Klaartje de Weerdt

About

Current research and teaching

Since 2014 I work as Professor at the Department of Structural Engineering, NTNU Trondheim. I am dividing my time between research and teaching.

In the autumn I teach Building Materials (TKT4240) to the 1st year Civil Engineering MSc students together with Prof. Tore Kvande. In spring I teach Concrete Structures I (TKT4175) to 3rd year Civil Engineering MSc students together with Prof. Jan Arve Øverli. In addition I contribute to the 4th year Concrete Technology I classes (TKT4215), Concrete Technology for Bridge (KT6004) as part of an experience based MSc program, as well as courses organized by the Norwegian Concrete Association.

Our research team is working on topics oriented towards cement hydration and concrete durability, with other words, concrete from cradle to grave.

Why do we need research on concrete? Cement is the glue of concrete. When it reacts with water it forms solid hydrates which glue the aggregates (stones) in the concrete together to form an artificial rock. The production of conventional Portland cement is associated with large amounts of CO2 emissions. One way of reducing these emissions is by replacing part of the Portland cement with supplementary materials such as limestone, fly ash (by product of coal fired power plants), blast furnace slag (byproduct of iron production), or calcined clay. The resulting composite cements behave differently than the conventional Portland cements both in fresh concrete (e.g. flow, interaction with chemical admixtures etc.) and as a hardened material (e.g. durability and mechanical properties). Research is needed to understand the behavior of these composite cements and to give provide a basis to potentially adapt the practice, regulations and test methods.

Through collaboration with other departments at NTNU and SINTEF we have access to large variety of experimental facilities. For analysis of samples we use amongst others TGA, XRD, SEM, calorimetry, rheology, titration, and ICP-MS. For exposure of concrete we have together with SINTEF access to amongst others carbonation chambers, ASR reactors, spray chambers, frost cabinets.

Publications

2024

Lindgård, Jan; Pedersen, Bård; Oberhardt, Nikolas; Wigum, Børge Johannes; Ullnæss, Inger Lise; Aasly, Kurt. (2024) Norwegian research project on pyrrhotite in concrete aggregates – aim and status.
Academic chapter/article/Conference paper
Bagheri, Mahsa; Lothenbach, Barbara; Lindgård, Jan; Haugen, Marit Kristin; Danner, Tobias; Pedersen, Bård. (2024) Changes in the cement paste due to pyrrhotite reaction during accelerated mortar bar testing.
Academic chapter/article/Conference paper
Hemstad, Petter; Lothenbach, Barbara; Weerdt, Klaartje de. (2024) Distribution of sulphate and aluminium in hydrated cement pastes. Cement and Concrete Research
Academic article
Hov, Sølve; Zabłocka, Kamila; Paniagua Lopez, Ana Priscilla; Weerdt, Klaartje de. (2024) Elemental mapping by micro X-ray fluorescence to assess binder distribution of improved soils. Géotechnique Letters
Academic article
Weerdt, Klaartje de; Bagheri, Mahsa; Lindgård, Jan; Lindstad, Hallvard; Rodrigues, A.; Duchesne, J.. (2024) Changes in cement paste during accelerated mortar bar testing for pyrrhotite containing aggregate. Cement and Concrete Research
Academic article
Hemstad, Petter; Lothenbach, Barbara; Kjellsen, Knut Ose; Weerdt, Klaartje de. (2024) The effect of varying cement replacement level on alkali metal distribution in cement pastes. Cement & Concrete Composites
Academic article
Bary, Benoît; Machner, Alisa; Weerdt, Klaartje de. (2024) Simulation of chloride diffusion tests in cement paste and mortar made with CEM II and CEM VI cements. Cement and Concrete Research
Academic article
Zuschlag, Pamela; Machner, Alisa Lydia; Hemstad, Petter; Kjellsen, Knut Ose; Zajac, Maciej; Ben Haha, Mohsen. (2024) Hydration of Composite Cements Containing Novel SCMs. Nordic Concrete Research
Academic article
Rønning, Terje; Lindgård, Jan; Bagheri, Mahsa; Wigum, Børge Johannes; Danner, Tobias; Weerdt, Klaartje de. (2024) Alkalis Released from Aggregates – Significance for Concrete Performance Testing. Springer
Academic chapter/article/Conference paper

2023

Gu, Yushan; Machner, Alisa; Weerdt, Klaartje de; Šajna, Aljoša; Hanžič, Lucija; Müller, Arnaud. (2023) Modeling the durability of novel cementitious materials prepared with CEM II/C-M exposed to drying and carbonation. Construction and Building Materials
Academic article
Hemstad, Petter; Zuschlag, Pamela; Kjellemyr, Petter; Lindgård, Jan; Kjellsen, Knut O.; Rønning, Terje. (2023) Alkali metal distribution in composite cement pastes and its relation to accelerated ASR tests. Cement and Concrete Research
Academic article
Weerdt, Klaartje de; Bernard, Ellina; Kunther, Wolfgang; Pedersen, Malene Thostrup; Lothenbach, Barbara. (2023) Phase changes in cementitious materials exposed to saline solutions. Cement and Concrete Research
Academic article
Bagheri, Mahsa; Lindgård, Jan; Lothenbach, B.; Haugen, Marit Kristin; Danner, Tobias; Wigum, Børge Johannes. (2023) Changes in the cement paste due to pyrrhotite reaction during accelerated mortar bar testing .
Academic chapter/article/Conference paper
Weerdt, Klaartje de; Wilson, William; Machner, Alisa; Georget, Fabien. (2023) Chloride profiles – What do they tell us and how should they be used?. Cement and Concrete Research
Academic article

2022

Menéndez, Esperanza; Silva, António Santos; Duchesne, Josée; Berra, Mario; De Weerdt, Klaartje; Fernandes, Isabel. (2022) RILEM TC 258-AAA Round Robin Test: Alkali release from aggregates. Critical review of the test method AAR-8.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Hemstad, Petter; Justnes, Harald; Østnor, Tone Anita; Rønning, Terje F.; Lindgård, Jan. (2022) Fundamental study on ASR kinetics - effect of temperature on aggregate reactivity and pore-water composition.
Academic chapter/article/Conference paper
Machner, Alisa; Bjørndal, Marie Helene; Justnes, Harald; Hanžič, Lucija; Šajna, Aljoša; Gu, Yushan. (2022) Effect of leaching on the composition of hydration phases during chloride exposure of mortar. Cement and Concrete Research
Academic article
Fjendbo, Simon; Sørensen, Henrik E.; De Weerdt, Klaartje; Geiker, Mette Rica. (2022) Å forutsi kloridinntrenging i betong i sjøvann. Byggeindustrien
Popular scientific article
Manquehual Mery, Cristobal Javier; Jakobsen, Pål Drevland; Holter, Karl Gunnar; De Weerdt, Klaartje; Danner, Tobias Alexander; Bruland, Amund. (2022) Comparison of the condition of steel fiber-reinforced shotcrete with water-glass and alkali-free activators after more than 20 years of service in a subsea road tunnel. Construction and Building Materials
Academic article
Danner, Tobias; De Weerdt, Klaartje; Pedersen, Bård Magne; Lindgård, Jan. (2022) Investigations on the feasibility of the CWE method to verify potential alkali release from aggregates in Norwegian field concrete.
Academic chapter/article/Conference paper
Fjendbo, Simon; Sørensen, Henrik E.; De Weerdt, Klaartje; Jakobsen, Ulla Hjorth; Geiker, Mette Rica. (2022) Correlating the development of chloride profiles and microstructural changes in marine concrete up to ten years. Cement & Concrete Composites
Academic article
Wigum, Børge Johannes; Lindgård, Jan; De Weerdt, Klaartje; Pedersen, Bård Magne; Rønning, Terje F.. (2022) Alkali Aggregate Reactions (AAR) in concrete. The Norwegian endeavour during more than 3 decades of research.
Academic chapter/article/Conference paper
Manquehual, Cristobal Javier; Jakobsen, Pål Drevland; Holter, Karl Gunnar; De Weerdt, Klaartje; Bruland, Amund. (2022) Investigation of leaching in steel fiber-reinforced shotcrete exposed to fresh and saline groundwater in a subsea road tunnel. Cement and Concrete Research
Academic article
Gu, Yushan; Bary, Benoît; Machner, Alisa; De Weerdt, Klaartje; Bolte, Gerd; Ben Haha, Mohsen. (2022) Multi-scale strategy to estimate the mechanical and diffusive properties of cementitious materials prepared with CEM II/C-M. Cement & Concrete Composites
Academic article
Menéndez, Esperanza; Silva, António Santos; Fernandes, Isabel; Duchesne, Josée; Berra, Mario; De Weerdt, Klaartje. (2022) RILEM TC 258-AAA Round Robin Test: Alkali release from aggregates and petrographic analysis. Critical review of the test method AAR-8. Materiales de construcción
Academic article
Lindstad, Hallvard; Lindgård, Jan; Pedersen, Bård Magne; Wigum, Børge Johannes; Aasly, Kurt; Ullnæss, Inger Lise. (2022) Pyrrhotite in concrete aggregate. Introduction to mechanism, damage potential and ongoing research.
Academic chapter/article/Conference paper
El Bitouri, Youssef; Azéma, Nathalie; Le Saoût, Gwenn; Lauten, Rolf Andreas; Weerdt, Klaartje de. (2022) Effect of Plasticizer on Hydration and Rheological Behavior of Cement Pastes. CivilEng
Academic article
Fjendbo, Simon; De Weerdt, Klaartje; Sørensen, Henrik E.; Geiker, Mette Rica. (2022) When and How Should Chloride Profiles be Calibrated for Paste Fraction?. Nordic Concrete Research
Academic article
Danner, Tobias; Norden, Geir; De Weerdt, Klaartje; Justnes, Harald. (2022) Low-Grade Kaolinite Clays for Sustainable Binders – Effect of mineralogy and curing temperature on hydration products.
Chapter
Babaahmadi, Arezou; Machner, Alisa; Kunther, Wolfgang; Figueira, João; Hemstad, Petter; De Weerdt, Klaartje. (2022) Chloride binding in Portland composite cements containing metakaolin and silica fume. Cement and Concrete Research
Academic article

2021

Justnes, Harald; De Weerdt, Klaartje; Østnor, Tone Anita. (2021) Portland Clinker-Fly Ash Cements – Relation between Compressive Strength and Microstructure. American Concrete Institute
Academic chapter/article/Conference paper
De Weerdt, Klaartje. (2021) Chloride binding in concrete: recent investigations and recognised knowledge gaps: RILEM Robert L’Hermite Medal Paper 2021. Materials and Structures
Academic article
Snellings, Ruben; Machner, Alisa Lydia; Bolte, Gerd; Kamyab, Hadi; Durdzinski, Pawel; Teck, Priscilla. (2021) Hydration kinetics of ternary slag-limestone cements: Impact of water to binder ratio and curing temperature. Cement and Concrete Research
Academic article
Hanžič, Lucija; Robič, Sebastijan; Machner, Alisa; Bjørndal, Marie Helene; De Weerdt, Klaartje; Gu, Yushan. (2021) Experimental carbonation study for a durability assessment of novel cementitious materials. Materials
Academic article
Machner, Alisa Lydia; Bjørndal, Marie Helene; Šajna, Aljoša; Mikanovic, Nikola; De Weerdt, Klaartje. (2021) Impact of leaching on chloride ingress profiles in concrete. Materials and Structures
Academic article
Fjendbo, Simon; Sørensen, Henrik E.; De Weerdt, Klaartje; Geiker, Mette Rica. (2021) The square root method for chloride ingress prediction - Applicability and limitations. Materials and Structures
Academic article

2020

Hemstad, Petter; Machner, Alisa; De Weerdt, Klaartje. (2020) The effect of artificial leaching with HCl on chloride binding in ordinary Portland cement paste. Cement and Concrete Research
Academic article
Guéguen Minerbe, Marielle; Feugeas, Françoise; Lors, Christine; Hayek, Mahmoud; Salgues, Marie; Habouzit, Frédéric. (2020) The influence of carbonation on the biocolonization of cementitious materials in the marine environment. Matériaux & Techniques
Academic article
Grimstad, Gustav; Paniagua Lopez, Ana Priscilla; De Weerdt, Klaartje. (2020) På vegen mot karbonnegativ stabil grunn. Byggeindustrien
Popular scientific article
Hayek, Mahmoud; Salgues, Marie; Habouzit, Frédéric; Bayle, Sandrine; Souche, Jean-Claude; De Weerdt, Klaartje. (2020) In vitro and in situ tests to evaluate the bacterial colonization of cementitious materials in the marine environment. Cement & Concrete Composites
Academic article

2019

De Weerdt, Klaartje; Lothenbach, Barbara; Geiker, Mette Rica. (2019) Comparing chloride ingress from seawater and NaCl solution in Portland cement mortar. Cement and Concrete Research
Academic article
Danielsen, Svein Willy; Hagelia, Per; Wigum, Børge Johannes; De Weerdt, Klaartje; Aasly, Kurt; Lindgård, Jan. (2019) Magnetkis i betongtilslag. Effekt på betongs bestandighet. Nordic Concrete Research (463)
Report
De Weerdt, Klaartje; Geiker, Mette Rica; Plusquellec, Gilles; Lindgård, Jan; Duchsne, Josee; Fournier, Benoit. (2019) Strategies for Quantification of Alkali Metal Release from Aggregates in Concrete. Rilem publications
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Plusquellec, Gilles; Belda Revert, Andres; Geiker, Mette Rica; Lothenbach, Barbara. (2019) Effect of carbonation on the pore solution of mortar. Cement and Concrete Research
Academic article
Belda Revert, Andres; Hornbostel, Karla; De Weerdt, Klaartje; Geiker, Mette Rica. (2019) Macrocell corrosion in carbonated Portland and Portland-fly ash concrete - Contribution and mechanism. Cement and Concrete Research
Academic article
Justnes, Harald; De Weerdt, Klaartje; Østnor, Tone Anita. (2019) Relation between strength of cements based on different clinkers and their microstructure.
Academic chapter/article/Conference paper
Machner, Alisa; Bjørndal, Marie Helene; De Weerdt, Klaartje. (2019) Ny sement for bedre miljø. Byggeindustrien
Popular scientific article

2018

Peng, Ya; Pedersen, Bård; Ng, Serina; De Weerdt, Klaartje; Jacobsen, Stefan. (2018) Filler and Water Reducer Effects on Sedimentation, Bleeding and Zeta-Potential of Cement Paste. Nordic Concrete Research
Academic article
Lindgård, Jan; Østnor, Tone Anita; Fournier, Benoit; Lindgård, Øyvind; Danner, Tobias; Plusquellec, Gilles. (2018) Determining alkali leaching during accelerated ASR performance testing and in field exposed cubes using cold water extraction (CWE) and µXRF. MATEC Web of Conferences
Academic article
Machner, Alisa; Hemstad, Petter; De Weerdt, Klaartje. (2018) Towards the Understanding of the pH Dependency of the Chloride Binding of Portland Cement Pastes. Nordic Concrete Research
Academic article
Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica. (2018) Carbonation-induced corrosion: Investigation of the corrosion onset. Construction and Building Materials
Academic article
Li, Xuerun; Snellings, Ruben; Antoni, Mathieu; Alderete, Natalia Mariel; Ben Haha, Mohsen; Bishnoi, Shashank. (2018) Reactivity tests for supplementary cementitious materials: RILEM TC 267-TRM phase 1. Materials and Structures
Academic article
Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica. (2018) Armeringskorrosjon i miljøvennlig betong. Byggeindustrien
Popular scientific article
Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica. (2018) Carbonation-induced corrosion, impact of sampling technique on predicted service life. Rilem publications
Academic chapter/article/Conference paper
Plusquellec, Gilles; Revert, Andres Belda; Geiker, Mette Rica; Lothenbach, Barbara; De Weerdt, Klaartje. (2018) Changes in pore solution composition in mortar due to carbonation. Rilem publications
Academic chapter/article/Conference paper
Machner, Alisa; Zajac, Maciej; Ben Haha, Mohsen; Kjellsen, Knut Ose; Geiker, Mette Rica; De Weerdt, Klaartje. (2018) Limitations of the hydrotalcite formation in Portland composite cement pastes containing dolomite and metakaolin. Cement and Concrete Research
Academic article
Machner, Alisa; Zajac, Maciej; Ben Haha, Mohsen; Kjellsen, Knut Ose; Geiker, Mette Rica; De Weerdt, Klaartje. (2018) Chloride-binding capacity of hydrotalcite in cement pastes containing dolomite and metakaolin. Cement and Concrete Research
Academic article
Machner, Alisa; Zajac, Maciej; Ben Haha, Mohsen; Kjellsen, Knut Ose; Geiker, Mette Rica; De Weerdt, Klaartje. (2018) Stability of the hydrate phase assemblage in Portland composite cements containing dolomite and metakaolin after leaching, carbonation, and chloride exposure. Cement & Concrete Composites
Academic article
Colombo, Alessia; Geiker, Mette Rica; Justnes, Harald; Lauten, Rolf A; De Weerdt, Klaartje. (2018) The effect of calcium lignosulfonate on ettringite formation in cement paste. Cement and Concrete Research
Academic article
Plusquellec, Gilles; Geiker, Mette Rica; Lindgård, Jan; De Weerdt, Klaartje. (2018) Determining the free alkali metal content in concrete – Case study of an ASR-affected dam. Cement and Concrete Research
Academic article
Belda Revert, Andres; De Weerdt, Klaartje; Hjorth Jakobsen, Ulla; Geiker, Mette Rica. (2018) Impact of Accelerated Carbonation on Microstructure and Phase Assemblage. Nordic Concrete Research
Academic article

2017

Hisdal, Jorun-Marie; De Weerdt, Klaartje; Strømmen, Ingvald; Kvande, Tore. (2017) UROP ruler. Byggeindustrien
Article in business/trade/industry journal
De Weerdt, Klaartje; Hepsøe, Per Martin; Lindgård, Jan. (2017) Relative humidity measurements in concrete. NTNU
Masters thesis
Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica. (2017) State-of-the-art report: Service life modelling, carbonation of concrete and corrosion in carbonated concrete. NTNU
Report
Plusquellec, Gilles; Geiker, Mette Rica; Lindgård, Jan; Duchesne, Josée; Fournier, Benoit; De Weerdt, Klaartje. (2017) Determination of the pH and the free alkali metal content in the pore solution of concrete: Review and experimental comparison. Cement and Concrete Research
Academic article
Shi, Zhenguo; Geiker, Mette Rica; De Weerdt, Klaartje; Østnor, Tone Anita; Lothenbach, Barbara; Winnefeld, Frank. (2017) Role of calcium on chloride binding in hydrated Portland cement–metakaolin–limestone blends. Cement and Concrete Research
Academic article
Colombo, Alessia; Geiker, Mette Rica; Justnes, Harald; Lauten, Rolf Andreas; De Weerdt, Klaartje. (2017) On the effect of calcium lignosulfonate on the rheology and setting time of cement paste. Cement and Concrete Research
Academic article
Machner, Alisa; Zajac, Maciej; Ben Haha, Mohsen; Kjellsen, Knut O.; Geiker, Mette Rica; De Weerdt, Klaartje. (2017) Portland metakaolin cement containing dolomite or limestone – Similarities and differences in phase assemblage and compressive strength. Construction and Building Materials
Academic article
Revert, Andres Belda; Geiker, Mette Rica; De Weerdt, Klaartje; Hjorth Jakobsen, Ulla. (2017) SEM-EDS analysis of products formed under natural and accelerated carbonation of concrete with CEM I, CEM II/B-M and CEM II/B-V.
Academic chapter/article/Conference paper
Danner, Tobias; De Weerdt, Klaartje; Geiker, Mette Rica. (2017) µ-XRF – CHARACTERISATION OF CHLORIDE INGRESS AND SELF-HEALING IN CRACKED CONCRETE.
Academic chapter/article/Conference paper
Revert, Andres Belda; Hornbostel, Karla; De Weerdt, Klaartje; Geiker, Mette Rica. (2017) Determination of the polarization resistance of steel in carbonated fly-ash concrete- effect of measurement technique.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Plusquellec, Gilles; Lindgård, Jan; Wigum, Børge Johannes; Kermit, Peter Holiman. (2017) Determining alkali content in ASR performance-tested concrete. NTNU
Masters thesis
Geiker, Mette Rica; De Weerdt, Klaartje; Ferreiro Garzón, Sergio; Jensen, Mads Mønster; Johannesson, Björn; Michel, Alexander. (2017) Screening of Low Clinker Binders, Compressive Strength and Chloride Ingress. Nordic Concrete Research
Academic article
Machner, Alisa; Zajac, Maciej; Ben Haha, Mohsen; Kjellsen, Knut Ose; Geiker, Mette Rica; De Weerdt, Klaartje. (2017) Investigation of the products of the dolomite reaction in Portland cement pastes.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Plusquellec, Gilles; Danner, Tobias; Geiker, Mette Rica. (2017) Ser betong i nytt lys med mikro-XRF. Byggeindustrien
Popular scientific article
Shi, Zhenguo; Geiker, Mette Rica; Lothenbach, Barbara; De Weerdt, Klaartje; Garzón, Sergio Ferreiro; Enemark-Rasmussen, Kasper. (2017) Friedel's salt profiles from thermogravimetric analysis and thermodynamic modelling of Portland cement-based mortars exposed to sodium chloride solution. Cement & Concrete Composites
Academic article
Colombo, Alessia; Geiker, Mette Rica; Justnes, Harald; Lauten, Rolf Andreas; De Weerdt, Klaartje. (2017) On the mechanisms of consumption of calcium lignosulfonate by cement paste. Cement and Concrete Research
Academic article
Plusquellec, Gilles; De Weerdt, Klaartje. (2017) Cold water extraction (CWE). Procedure for the determination of the alkali content and pore solution composition. NTNU
Report
Geiker, Mette Rica; De Weerdt, Klaartje; Ferreiro Garzón, Sergio; Jensen, Mads Mønster; Johannesson, Björn; Michel, Alexander. (2017) Durability testing of low clinker blends - chloride ingress in similar strength mortar exposed to seawater.
Academic chapter/article/Conference paper
Luong, Judy Yuen Wah; Aarstad, Kari; De Weerdt, Klaartje; Bjøntegaard, Øyvind. (2017) Excavated rock materials from tunnels for sprayed concrete.
Academic chapter/article/Conference paper
Machner, Alisa; De Weerdt, Klaartje; Geiker, Mette Rica; Kjellsen, Knut O.. (2017) Bedre egenskaper med dolomitt i sement. Byggeindustrien
Popular scientific article

2016

Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica. (2016) Carbonation Characterization of Mortar with Portland Cement and Fly Ash, Comparison of Techniques. Nordic Concrete Research
Academic article
Plusquellec, Gilles; De Weerdt, Klaartje. (2016) Alkalireaksjoner i betong - rollen til alkalier. Byggeindustrien
Popular scientific article
Plusquellec, Gilles; Geiker, Mette Rica; Duchesne, Josée; Lindgård, Jan; De Weerdt, Klaartje. (2016) Review of methods to determine the pH and the free alkali content of the pore solution in concrete. The International Conference on Alkali-Aggregate Reaction (ICAAR)
Academic article
De Weerdt, Klaartje; Bernhardt, Markus; Geiker, Mette Rica; Skjølsvold, Ola; Kjellsen, Knut Ose. (2016) Influence of cast and cut surface on chloride ingress resistance of concrete in marine splash zone.
Academic chapter/article/Conference paper
Shi, Zhenguo; Geiker, Mette Rica; De Weerdt, Klaartje; Lothenbach, Barbara; Kaufmann, J.; Garzon, Sergio Ferreiro. (2016) Chloride resistance of Portland cement – calcined clay – limestone mortars.
Academic chapter/article/Conference paper
Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica. (2016) Investigation of the effect of partial replacement of Portland Cement by Fly Ash on carbonation using TGA and SEM-EDS. Rilem publications
Academic chapter/article/Conference paper
Vurucu, Havvagul; De Weerdt, Klaartje; Plusquellec, Gilles. (2016) Alkali-silica reaction in concrete dams: Alkali leaching in the Votna dam. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
Masters thesis
Colombo, Alessia; Geiker, Mette Rica; De Weerdt, Klaartje. (2016) Plastifiserende stoffer til betong på nanonivå. Byggeindustrien
Popular scientific article
Shi, Z; Geiker, Mette Rica; De Weerdt, Klaartje; Østnor, Tone Anita; Lothenback, B.; Winnefeld, F.. (2016) Impact of cations on chloride binding in hydrated portland cement – metakaolin – limestone blends.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Geiker, Mette Rica. (2016) Workshop on Moisture in Concrete, Trondheim, Norway 6–7 February 2012. Measurement of moisture and relative humidity in concrete. FA 3 Technical performance. FA 3.2 Service life. SINTEF akademisk forlag COIN Projet report (81)
Report
Jakobsen, Ulla Hjorth; De Weerdt, Klaartje; Geiker, Mette Rica. (2016) Elemental zonation in marine concrete. Cement and Concrete Research
Academic article
Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica. (2016) Karbonatisering av miljøvennlig betong. Byggeindustrien
Popular scientific article
De Weerdt, Klaartje; Orsakova, Denisa; Muller, Arnaud CA; Larsen, Claus K; Pedersen, Bård; Geiker, Mette Rica. (2016) Towards the understanding of chloride profiles in marine exposed concrete, impact of leaching and moisture content. Construction and Building Materials
Academic article
Weerdt, Klaartje de; Bernhardt, Markus; Geiker, Mette Rica; Skjølsvold, Ola; Kjellsen, Knut Ose. (2016) Influence of cast and cut concrete surfaces on chloride ingress resistance of concrete in marine splash zone. Sustainable Construction Materials and Technologies
Academic article

2015

De Weerdt, Klaartje; Østnor, Tone Anita; Justnes, Harald. (2015) Microstructure of clinker – fly ash interactions. COIN Projet report (69)
Report
Revert, Andres Belda; De Weerdt, Klaartje; Geiker, Mette Rica. (2015) Carbonation front characterization: pH colour indicators.
Academic chapter/article/Conference paper
Machner, Alisa; Bussetti, Lucie; Geiker, Mette Rica; De Weerdt, Klaartje. (2015) Critical investigation of TGA sample preparation for composite cements.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Geiker, Mette Rica. (2015) Hvor er kloridene i betong?. Anleggsmagasinet
Popular scientific article
Shi, Zhenguo; Geiker, Mette Rica; De Weerdt, Klaartje; Lothenbach, Barbara; Kaufmann, Josef; Kunther, Wolfgang. (2015) Durability of portland cement blends including calcined clay and limestone: Interactions with sulfate, chloride and carbonate ions. RILEM Bookseries
Academic article
Hammer, Tor Arne; Kjellmark, Gunrid; Smeplass, Sverre; De Weerdt, Klaartje. (2015) Practical methods to assess segregation risk of SCC on site. FA: Competitive constructions. SP 2.1 Robust and highly flowable concrete with controlled surface quality. COIN Projet report (59)
Report
De Weerdt, Klaartje; Geiker, Mette Rica; Orsakova, Denisa. (2015) Investigation of concrete from Solsvik field station - 4 concrete cores investigated after 16 years of submerged exposure. Statens vegvesens rapporter (353)
Report
De Weerdt, Klaartje; Colombo, Alessia; Coppola, L.; Justnes, Harald; Geiker, Mette Rica. (2015) Impact of the associated cation on chloride binding of Portland cement paste. Cement and Concrete Research
Academic article
De Weerdt, Klaartje; Justnes, Harald. (2015) The effect of sea water on the phase assemblage of hydrated cement paste. Cement & Concrete Composites
Academic article
De Weerdt, Klaartje; Justnes, Harald; Jakobsen, Ulla Hjorth; Geiker, Mette Rica. (2015) M-S-H formation in marine exposed concrete.
Academic chapter/article/Conference paper
Colombo, Alessia; De Weerdt, Klaartje; Geiker, Mette Rica; Justnes, Harald. (2015) Effect of fly ash on the consumption of lignosulfonate by cement paste.
Academic chapter/article/Conference paper
Lothenbach, Barbara; Durdzinski, Pawel; De Weerdt, Klaartje. (2015) Thermogravimetric Analysis. CRC Press
Academic chapter/article/Conference paper
Jensen, MM; De Weerdt, Klaartje; Johannesson, B; Geiker, Mette Rica. (2015) Use of a multi-species reactive transport model to simulate chloride ingress in mortar exposed to NaCl solution or sea-water. Computational Materials Science
Academic article

2014

De Weerdt, Klaartje; Justnes, Harald. (2014) The Effect of Excessive Sea Water on the Phase Assemblage of Hydrated Cement Paste.
Academic chapter/article/Conference paper
Peng, Ya; De Weerdt, Klaartje; Pedersen, Bård; Jacobsen, Stefan. (2014) Measuring sedimentation and bleeding of fresh paste with hydrostatic pressure. Nordic Concrete Research
Academic article
De Weerdt, Klaartje; Orsáková, D.; Geiker, Mette Rica. (2014) The impact of sulphate and magnesium on chloride binding in Portland cement paste. Cement and Concrete Research
Academic article
Colombo, Alessia; Danner, Tobias ; De Weerdt, Klaartje; Geiker, Mette Rica; Justnes, Harald. (2014) Impact of mixing on early hydration of cement paste with lignosulphonate.
Academic chapter/article/Conference paper
Peng, Ya; De Weerdt, Klaartje; Pedersen, Bård; Jacobsen, Stefan. (2014) Hydrostatic pressure to measure sedimentation and bleeding.
Academic chapter/article/Conference paper
Aarstad, Kari; Østnor, Tone Anita; Kaspersen, Kristin; De Weerdt, Klaartje. (2014) Snakker ikke nok om utseendet (betongoverflater). SINTEF akademisk forlag
Popular scientific chapter/article
De Weerdt, Klaartje; Hammer, Tor Arne. (2014) Betong som ikke skiller seg. SINTEF akademisk forlag
Popular scientific chapter/article
Østnor, Tone Anita; Aarstad, Kari; Kaspersen, Kristin; De Weerdt, Klaartje. (2014) Brukermanual for BetongGUI – analyse og karakterisering av porer på betongoverflaten. SINTEF akademisk forlag COIN Projet report (51)
Report
Geiker, Mette Rica; De Weerdt, Klaartje; Hornbostel, Karla; Kioumarsi, Mohammad Mahdi; Hendriks, Max ; Larsen, Claus K. (2014) Prediction of reinforcement corrosion in concrete structures.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Ytterdal, Silje Gystad; Geiker, Mette Rica. (2014) On the impact of phase changes on chloride profiles in concrete.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Justnes, Harald; Geiker, Mette Rica. (2014) Changes in the phase assemblage of concrete exposed to sea water. Cement & Concrete Composites
Academic article
Peng, Ya; Jacobsen, Stefan; De Weerdt, Klaartje; Pedersen, Bård. (2014) Model and test methods for stability of fresh cement paste. Advances in Civil Engineering Materials
Academic article

2013

Martius-Hammer, Tor Arne; Smeplass, Sverre; De Weerdt, Klaartje; Peng, Ya. (2013) Stability of SCC – robustness for changes in water content and sand grading. FA 2 Competitive constructions. SP 2.1 Robust highly flowable concrete. COIN Projet report (47)
Report
De Weerdt, Klaartje; Østnor, Tone Anita; Justnes, Harald. (2013) Fly ash – Limestone Synergy in Ternary Cements. FA 1 Environmentally friendly concrete. SP 1.1 Low carbon-footprint binder systems. COIN Projet report (46)
Report
Geiker, Mette Rica; De Weerdt, Klaartje; Hornbostel, Karla; Kioumarsi, Mohammad Mahdi; Max, Hendriks. (2013) Levetid av armerte betongkonstruksjoner.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Colombo, Alessia; Geiker, Mette Rica. (2013) Impact of the associated cation on chloride binding in Portland cement paste.
Academic chapter/article/Conference paper
Justnes, Harald; De Weerdt, Klaartje; Geiker, Mette Rica. (2013) CHLORIDE BINDINGS IN CONCRETE EXPOSED TO SEA WATER AND SALT SOLUTIONS. Rilem publications
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Østnor, Tone Anita; Justnes, Harald; Ben Haha, Mohsen; Kjellsen, Knut Ose. (2013) Fly-ash limestone synergy in triple cement.
Academic chapter/article/Conference paper
Wirthova, Michaela; De Weerdt, Klaartje; Jacobsen, Stefan. (2013) Static yield stress measurements on SCC, mortar and matrix. NTNU, Dept of Structural Engineering
Report
De Weerdt, Klaartje; Geiker, Mette Rica; Justnes, Harald. (2013) 10 year old concrete wall in tidal zone examined by SEM-EDS.
Academic chapter/article/Conference paper

2012

De Weerdt, Klaartje; Ben Haha, M.; Le Saout, G.; Kjellsen, Knut O.; Justnes, Harald; Lothenbach, B.. (2012) The effect of temperature on the hydration of composite cements containing limestone powder and fly ash. Materials and Structures
Academic article
Peng, Ya; Jacobsen, Stefan; De Weerdt, Klaartje; Pedersen, Bård; Marstrander, Britt Blom. (2012) Overview of Rheological Parameters Affecting Stability of SCC. American Concrete Institute
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Geiker, Mette Rica. (2012) Modelling the reaction of fly ash and slag in blended cements.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Geiker, Mette Rica. (2012) Changes in the phase assemblage of concrete exposed to seawater - case study.
Academic chapter/article/Conference paper
De Weerdt, Klaartje. (2012) 50 prosent mindre CO2-utslipp med lavkarbonsement. Murmesteren
Interview Journal
De Weerdt, Klaartje; Eide, Mari Bøhnsdalen; Smeplass, Sverre; Wirthova, Micheala. (2012) The effect of stabilization with either filler or chemical stabilizer on the surface quality of concrete elements : FA 2 Competitive constructions : SP 2.1 Robust highly flowable concrete. COIN Projet report (39)
Report
De Weerdt, Klaartje; Geiker, Mette Rica. (2012) On the application of thermodynamic modelling for the prediction of the hydrate assemblage formed by blended cements.
Academic chapter/article/Conference paper
Kaspersen, Kristin; Østnor, Tone Anita; Eide, Mari Bøhnsdalen; De Weerdt, Klaartje. (2012) Characterisation of concrete surfaces in Askimporten tunnel: COIN project report 45 - 2012. COIN Projet report (45)
Report
Cepuritis, Rolands; Jacobsen, Stefan; Pedersen, Bård; Vikan, Hedda Vestøl; De Weerdt, Klaartje. (2012) Rheology of matrix and SCC with different mineral fillers and admixtures : FA 2 Competitive constructions : SP 2.1 High quality manufactured sand for concrete. COIN Projet report (41)
Report

2011

De Weerdt, Klaartje. (2011) Blended Cement with Reduced CO2 Emission - Utilizing the Fly Ash - Limestone Synergy. Tapir Akademisk Forlag Tapir Akademisk Forlag
Doctoral dissertation
De Weerdt, Klaartje; Kjellsen, Knut O.; Sellevold, Erik Johan; Justnes, Harald. (2011) Synergy between fly ash and limestone powder in ternary cements. Cement & Concrete Composites
Academic article
De Weerdt, Klaartje; Ben Haha, M.; Le Saout, G.; Kjellsen, Knut O.; Justnes, Harald; Lothenbach, B.. (2011) Hydration mechanisms of ternary Portland cement containing limestone powder and fly ash. Cement and Concrete Research
Academic article
Justnes, Harald; Østnor, Tone Anita; De Weerdt, Klaartje; Vikan, Hedda Vestøl. (2011) Calcined marl and clay as mineral addition for more sustainable concrete structures. CI-Premier Pte Ltd
Academic chapter/article/Conference paper
Vikan, Hedda Vestøl; De Weerdt, Klaartje; Smeplass, Sverre. (2011) Rheological properties of self-consolidating concrete stabilized with fillers or admixtures. Rilem publications
Academic chapter/article/Conference paper
Vikan, Hedda Vestøl; De Weerdt, Klaartje. (2011) Rheological properties of self-consolidating concrete stabilized with fillers or admixtures.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Justnes, Harald; Lothenbach, Barbara; Ben Haha, Mohsen. (2011) The effect of limestone powder additions on strength and microstructure of fly ash blended cements. Consejo Superior de Investigaciones Científicas (CSIC)
Academic chapter/article/Conference paper
Østnor, Tone Anita; De Weerdt, Klaartje; Justnes, Harald; Bjøntegaard, Øyvind. (2011) Reactivity and microstructure of ternary cement pastes. Consejo Superior de Investigaciones Científicas (CSIC)
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Sellevold, Erik Johan; Kjellsen, Knut O.; Justnes, Harald. (2011) Fly ash-limestone ternary cements: effect of component fineness. Advances in Cement Research
Academic article
Cepuritis, Rolands; Jacobsen, Stefan; Pedersen, Bård; Vikan, Hedda; Rudberg, Espen André; De Weerdt, Klaartje. (2011) Rheology of matrix with different crushed mineral fillers and admixtures.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Justnes, Harald; Kjellsen, Knut O.. (2011) Synergetic effect between fly ash and limestone powder in Portland composite cement.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Vikan, Hedda Vestøl. (2011) Rheological properties of stabilized SCC – using fillers, admixtures or a combination : FA 2 Competitive constructions SP 2.1 Robust highly flowable concrete. COIN Projet report (38)
Report
De Weerdt, Klaartje. (2011) Nordic Concrete rheology workshop : – Trondheim, Norway 3–4 October 2011 : FA 2 Competitive constructions : SP 2.1 Robust highly flowable concrete and SP 2.3 High quality manufactured sand for concrete / Klaartje De Weerdt (editor). COIN Projet report (35)
Report
De Weerdt, Klaartje. (2011) Geopolymers – State of the art : FA 1 Environmentally friendly concrete : SP 1.1 Low carbon-footprint binder systems. COIN Projet report (37)
Report

2010

De Weerdt, Klaartje; Justnes, Harald; Kjellsen, Knut O.; Sellevold, Erik Johan. (2010) Fly ash-limestone ternary composite cements: synergetic effect at 28 days. Nordic Concrete Research
Academic article
Ben Haha, M.; De Weerdt, Klaartje; Lothenbach, Barbara. (2010) Quanfification of the degree of reaction of fly ash. Cement and Concrete Research
Academic article
Vikan, Hedda Vestøl; De Weerdt, Klaartje. (2010) Stability of SCC - chemical stabilisers versus filler : FA 2.1 Robust highly flowable concrete, SP 2.1.4 Workability. COIN Projet report (25)
Report

2008

De Weerdt, Klaartje; Justnes, Harald. (2008) The reactivity of Fly Ash and Limestone in Cementitious Systems.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Justnes, Harald. (2008) Comparing Intergrinding and Separate Grinding of Blended Cements.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Justnes, Harald. (2008) Microstructure of Binder from the Pozzolanic Reaction between Lime and Siliceous Fly Ash, and the effect of Limestone Addition.
Academic chapter/article/Conference paper

2007

De Weerdt, Klaartje. (2007) Ternary Blended Cements with Fly Ash and Limestone. Part I: Activation of Fly Ash. State of the art. SINTEF Rapport (SBF BK A07023)
Report

Journal publications

Hemstad, Petter; Lothenbach, Barbara; Weerdt, Klaartje de. (2024) Distribution of sulphate and aluminium in hydrated cement pastes. Cement and Concrete Research
Academic article
Hov, Sølve; Zabłocka, Kamila; Paniagua Lopez, Ana Priscilla; Weerdt, Klaartje de. (2024) Elemental mapping by micro X-ray fluorescence to assess binder distribution of improved soils. Géotechnique Letters
Academic article
Weerdt, Klaartje de; Bagheri, Mahsa; Lindgård, Jan; Lindstad, Hallvard; Rodrigues, A.; Duchesne, J.. (2024) Changes in cement paste during accelerated mortar bar testing for pyrrhotite containing aggregate. Cement and Concrete Research
Academic article
Hemstad, Petter; Lothenbach, Barbara; Kjellsen, Knut Ose; Weerdt, Klaartje de. (2024) The effect of varying cement replacement level on alkali metal distribution in cement pastes. Cement & Concrete Composites
Academic article
Bary, Benoît; Machner, Alisa; Weerdt, Klaartje de. (2024) Simulation of chloride diffusion tests in cement paste and mortar made with CEM II and CEM VI cements. Cement and Concrete Research
Academic article
Zuschlag, Pamela; Machner, Alisa Lydia; Hemstad, Petter; Kjellsen, Knut Ose; Zajac, Maciej; Ben Haha, Mohsen. (2024) Hydration of Composite Cements Containing Novel SCMs. Nordic Concrete Research
Academic article
Gu, Yushan; Machner, Alisa; Weerdt, Klaartje de; Šajna, Aljoša; Hanžič, Lucija; Müller, Arnaud. (2023) Modeling the durability of novel cementitious materials prepared with CEM II/C-M exposed to drying and carbonation. Construction and Building Materials
Academic article
Hemstad, Petter; Zuschlag, Pamela; Kjellemyr, Petter; Lindgård, Jan; Kjellsen, Knut O.; Rønning, Terje. (2023) Alkali metal distribution in composite cement pastes and its relation to accelerated ASR tests. Cement and Concrete Research
Academic article
Weerdt, Klaartje de; Bernard, Ellina; Kunther, Wolfgang; Pedersen, Malene Thostrup; Lothenbach, Barbara. (2023) Phase changes in cementitious materials exposed to saline solutions. Cement and Concrete Research
Academic article
Weerdt, Klaartje de; Wilson, William; Machner, Alisa; Georget, Fabien. (2023) Chloride profiles – What do they tell us and how should they be used?. Cement and Concrete Research
Academic article
Machner, Alisa; Bjørndal, Marie Helene; Justnes, Harald; Hanžič, Lucija; Šajna, Aljoša; Gu, Yushan. (2022) Effect of leaching on the composition of hydration phases during chloride exposure of mortar. Cement and Concrete Research
Academic article
Fjendbo, Simon; Sørensen, Henrik E.; De Weerdt, Klaartje; Geiker, Mette Rica. (2022) Å forutsi kloridinntrenging i betong i sjøvann. Byggeindustrien
Popular scientific article
Manquehual Mery, Cristobal Javier; Jakobsen, Pål Drevland; Holter, Karl Gunnar; De Weerdt, Klaartje; Danner, Tobias Alexander; Bruland, Amund. (2022) Comparison of the condition of steel fiber-reinforced shotcrete with water-glass and alkali-free activators after more than 20 years of service in a subsea road tunnel. Construction and Building Materials
Academic article
Fjendbo, Simon; Sørensen, Henrik E.; De Weerdt, Klaartje; Jakobsen, Ulla Hjorth; Geiker, Mette Rica. (2022) Correlating the development of chloride profiles and microstructural changes in marine concrete up to ten years. Cement & Concrete Composites
Academic article
Manquehual, Cristobal Javier; Jakobsen, Pål Drevland; Holter, Karl Gunnar; De Weerdt, Klaartje; Bruland, Amund. (2022) Investigation of leaching in steel fiber-reinforced shotcrete exposed to fresh and saline groundwater in a subsea road tunnel. Cement and Concrete Research
Academic article
Gu, Yushan; Bary, Benoît; Machner, Alisa; De Weerdt, Klaartje; Bolte, Gerd; Ben Haha, Mohsen. (2022) Multi-scale strategy to estimate the mechanical and diffusive properties of cementitious materials prepared with CEM II/C-M. Cement & Concrete Composites
Academic article
Menéndez, Esperanza; Silva, António Santos; Fernandes, Isabel; Duchesne, Josée; Berra, Mario; De Weerdt, Klaartje. (2022) RILEM TC 258-AAA Round Robin Test: Alkali release from aggregates and petrographic analysis. Critical review of the test method AAR-8. Materiales de construcción
Academic article
El Bitouri, Youssef; Azéma, Nathalie; Le Saoût, Gwenn; Lauten, Rolf Andreas; Weerdt, Klaartje de. (2022) Effect of Plasticizer on Hydration and Rheological Behavior of Cement Pastes. CivilEng
Academic article
Fjendbo, Simon; De Weerdt, Klaartje; Sørensen, Henrik E.; Geiker, Mette Rica. (2022) When and How Should Chloride Profiles be Calibrated for Paste Fraction?. Nordic Concrete Research
Academic article
Babaahmadi, Arezou; Machner, Alisa; Kunther, Wolfgang; Figueira, João; Hemstad, Petter; De Weerdt, Klaartje. (2022) Chloride binding in Portland composite cements containing metakaolin and silica fume. Cement and Concrete Research
Academic article
De Weerdt, Klaartje. (2021) Chloride binding in concrete: recent investigations and recognised knowledge gaps: RILEM Robert L’Hermite Medal Paper 2021. Materials and Structures
Academic article
Snellings, Ruben; Machner, Alisa Lydia; Bolte, Gerd; Kamyab, Hadi; Durdzinski, Pawel; Teck, Priscilla. (2021) Hydration kinetics of ternary slag-limestone cements: Impact of water to binder ratio and curing temperature. Cement and Concrete Research
Academic article
Hanžič, Lucija; Robič, Sebastijan; Machner, Alisa; Bjørndal, Marie Helene; De Weerdt, Klaartje; Gu, Yushan. (2021) Experimental carbonation study for a durability assessment of novel cementitious materials. Materials
Academic article
Machner, Alisa Lydia; Bjørndal, Marie Helene; Šajna, Aljoša; Mikanovic, Nikola; De Weerdt, Klaartje. (2021) Impact of leaching on chloride ingress profiles in concrete. Materials and Structures
Academic article
Fjendbo, Simon; Sørensen, Henrik E.; De Weerdt, Klaartje; Geiker, Mette Rica. (2021) The square root method for chloride ingress prediction - Applicability and limitations. Materials and Structures
Academic article
Hemstad, Petter; Machner, Alisa; De Weerdt, Klaartje. (2020) The effect of artificial leaching with HCl on chloride binding in ordinary Portland cement paste. Cement and Concrete Research
Academic article
Guéguen Minerbe, Marielle; Feugeas, Françoise; Lors, Christine; Hayek, Mahmoud; Salgues, Marie; Habouzit, Frédéric. (2020) The influence of carbonation on the biocolonization of cementitious materials in the marine environment. Matériaux & Techniques
Academic article
Grimstad, Gustav; Paniagua Lopez, Ana Priscilla; De Weerdt, Klaartje. (2020) På vegen mot karbonnegativ stabil grunn. Byggeindustrien
Popular scientific article
Hayek, Mahmoud; Salgues, Marie; Habouzit, Frédéric; Bayle, Sandrine; Souche, Jean-Claude; De Weerdt, Klaartje. (2020) In vitro and in situ tests to evaluate the bacterial colonization of cementitious materials in the marine environment. Cement & Concrete Composites
Academic article
De Weerdt, Klaartje; Lothenbach, Barbara; Geiker, Mette Rica. (2019) Comparing chloride ingress from seawater and NaCl solution in Portland cement mortar. Cement and Concrete Research
Academic article
De Weerdt, Klaartje; Plusquellec, Gilles; Belda Revert, Andres; Geiker, Mette Rica; Lothenbach, Barbara. (2019) Effect of carbonation on the pore solution of mortar. Cement and Concrete Research
Academic article
Belda Revert, Andres; Hornbostel, Karla; De Weerdt, Klaartje; Geiker, Mette Rica. (2019) Macrocell corrosion in carbonated Portland and Portland-fly ash concrete - Contribution and mechanism. Cement and Concrete Research
Academic article
Machner, Alisa; Bjørndal, Marie Helene; De Weerdt, Klaartje. (2019) Ny sement for bedre miljø. Byggeindustrien
Popular scientific article
Peng, Ya; Pedersen, Bård; Ng, Serina; De Weerdt, Klaartje; Jacobsen, Stefan. (2018) Filler and Water Reducer Effects on Sedimentation, Bleeding and Zeta-Potential of Cement Paste. Nordic Concrete Research
Academic article
Lindgård, Jan; Østnor, Tone Anita; Fournier, Benoit; Lindgård, Øyvind; Danner, Tobias; Plusquellec, Gilles. (2018) Determining alkali leaching during accelerated ASR performance testing and in field exposed cubes using cold water extraction (CWE) and µXRF. MATEC Web of Conferences
Academic article
Machner, Alisa; Hemstad, Petter; De Weerdt, Klaartje. (2018) Towards the Understanding of the pH Dependency of the Chloride Binding of Portland Cement Pastes. Nordic Concrete Research
Academic article
Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica. (2018) Carbonation-induced corrosion: Investigation of the corrosion onset. Construction and Building Materials
Academic article
Li, Xuerun; Snellings, Ruben; Antoni, Mathieu; Alderete, Natalia Mariel; Ben Haha, Mohsen; Bishnoi, Shashank. (2018) Reactivity tests for supplementary cementitious materials: RILEM TC 267-TRM phase 1. Materials and Structures
Academic article
Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica. (2018) Armeringskorrosjon i miljøvennlig betong. Byggeindustrien
Popular scientific article
Machner, Alisa; Zajac, Maciej; Ben Haha, Mohsen; Kjellsen, Knut Ose; Geiker, Mette Rica; De Weerdt, Klaartje. (2018) Limitations of the hydrotalcite formation in Portland composite cement pastes containing dolomite and metakaolin. Cement and Concrete Research
Academic article
Machner, Alisa; Zajac, Maciej; Ben Haha, Mohsen; Kjellsen, Knut Ose; Geiker, Mette Rica; De Weerdt, Klaartje. (2018) Chloride-binding capacity of hydrotalcite in cement pastes containing dolomite and metakaolin. Cement and Concrete Research
Academic article
Machner, Alisa; Zajac, Maciej; Ben Haha, Mohsen; Kjellsen, Knut Ose; Geiker, Mette Rica; De Weerdt, Klaartje. (2018) Stability of the hydrate phase assemblage in Portland composite cements containing dolomite and metakaolin after leaching, carbonation, and chloride exposure. Cement & Concrete Composites
Academic article
Colombo, Alessia; Geiker, Mette Rica; Justnes, Harald; Lauten, Rolf A; De Weerdt, Klaartje. (2018) The effect of calcium lignosulfonate on ettringite formation in cement paste. Cement and Concrete Research
Academic article
Plusquellec, Gilles; Geiker, Mette Rica; Lindgård, Jan; De Weerdt, Klaartje. (2018) Determining the free alkali metal content in concrete – Case study of an ASR-affected dam. Cement and Concrete Research
Academic article
Belda Revert, Andres; De Weerdt, Klaartje; Hjorth Jakobsen, Ulla; Geiker, Mette Rica. (2018) Impact of Accelerated Carbonation on Microstructure and Phase Assemblage. Nordic Concrete Research
Academic article
Hisdal, Jorun-Marie; De Weerdt, Klaartje; Strømmen, Ingvald; Kvande, Tore. (2017) UROP ruler. Byggeindustrien
Article in business/trade/industry journal
Plusquellec, Gilles; Geiker, Mette Rica; Lindgård, Jan; Duchesne, Josée; Fournier, Benoit; De Weerdt, Klaartje. (2017) Determination of the pH and the free alkali metal content in the pore solution of concrete: Review and experimental comparison. Cement and Concrete Research
Academic article
Shi, Zhenguo; Geiker, Mette Rica; De Weerdt, Klaartje; Østnor, Tone Anita; Lothenbach, Barbara; Winnefeld, Frank. (2017) Role of calcium on chloride binding in hydrated Portland cement–metakaolin–limestone blends. Cement and Concrete Research
Academic article
Colombo, Alessia; Geiker, Mette Rica; Justnes, Harald; Lauten, Rolf Andreas; De Weerdt, Klaartje. (2017) On the effect of calcium lignosulfonate on the rheology and setting time of cement paste. Cement and Concrete Research
Academic article
Machner, Alisa; Zajac, Maciej; Ben Haha, Mohsen; Kjellsen, Knut O.; Geiker, Mette Rica; De Weerdt, Klaartje. (2017) Portland metakaolin cement containing dolomite or limestone – Similarities and differences in phase assemblage and compressive strength. Construction and Building Materials
Academic article
Geiker, Mette Rica; De Weerdt, Klaartje; Ferreiro Garzón, Sergio; Jensen, Mads Mønster; Johannesson, Björn; Michel, Alexander. (2017) Screening of Low Clinker Binders, Compressive Strength and Chloride Ingress. Nordic Concrete Research
Academic article
De Weerdt, Klaartje; Plusquellec, Gilles; Danner, Tobias; Geiker, Mette Rica. (2017) Ser betong i nytt lys med mikro-XRF. Byggeindustrien
Popular scientific article
Shi, Zhenguo; Geiker, Mette Rica; Lothenbach, Barbara; De Weerdt, Klaartje; Garzón, Sergio Ferreiro; Enemark-Rasmussen, Kasper. (2017) Friedel's salt profiles from thermogravimetric analysis and thermodynamic modelling of Portland cement-based mortars exposed to sodium chloride solution. Cement & Concrete Composites
Academic article
Colombo, Alessia; Geiker, Mette Rica; Justnes, Harald; Lauten, Rolf Andreas; De Weerdt, Klaartje. (2017) On the mechanisms of consumption of calcium lignosulfonate by cement paste. Cement and Concrete Research
Academic article
Machner, Alisa; De Weerdt, Klaartje; Geiker, Mette Rica; Kjellsen, Knut O.. (2017) Bedre egenskaper med dolomitt i sement. Byggeindustrien
Popular scientific article
Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica. (2016) Carbonation Characterization of Mortar with Portland Cement and Fly Ash, Comparison of Techniques. Nordic Concrete Research
Academic article
Plusquellec, Gilles; De Weerdt, Klaartje. (2016) Alkalireaksjoner i betong - rollen til alkalier. Byggeindustrien
Popular scientific article
Plusquellec, Gilles; Geiker, Mette Rica; Duchesne, Josée; Lindgård, Jan; De Weerdt, Klaartje. (2016) Review of methods to determine the pH and the free alkali content of the pore solution in concrete. The International Conference on Alkali-Aggregate Reaction (ICAAR)
Academic article
Colombo, Alessia; Geiker, Mette Rica; De Weerdt, Klaartje. (2016) Plastifiserende stoffer til betong på nanonivå. Byggeindustrien
Popular scientific article
Jakobsen, Ulla Hjorth; De Weerdt, Klaartje; Geiker, Mette Rica. (2016) Elemental zonation in marine concrete. Cement and Concrete Research
Academic article
Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica. (2016) Karbonatisering av miljøvennlig betong. Byggeindustrien
Popular scientific article
De Weerdt, Klaartje; Orsakova, Denisa; Muller, Arnaud CA; Larsen, Claus K; Pedersen, Bård; Geiker, Mette Rica. (2016) Towards the understanding of chloride profiles in marine exposed concrete, impact of leaching and moisture content. Construction and Building Materials
Academic article
Weerdt, Klaartje de; Bernhardt, Markus; Geiker, Mette Rica; Skjølsvold, Ola; Kjellsen, Knut Ose. (2016) Influence of cast and cut concrete surfaces on chloride ingress resistance of concrete in marine splash zone. Sustainable Construction Materials and Technologies
Academic article
De Weerdt, Klaartje; Geiker, Mette Rica. (2015) Hvor er kloridene i betong?. Anleggsmagasinet
Popular scientific article
Shi, Zhenguo; Geiker, Mette Rica; De Weerdt, Klaartje; Lothenbach, Barbara; Kaufmann, Josef; Kunther, Wolfgang. (2015) Durability of portland cement blends including calcined clay and limestone: Interactions with sulfate, chloride and carbonate ions. RILEM Bookseries
Academic article
De Weerdt, Klaartje; Colombo, Alessia; Coppola, L.; Justnes, Harald; Geiker, Mette Rica. (2015) Impact of the associated cation on chloride binding of Portland cement paste. Cement and Concrete Research
Academic article
De Weerdt, Klaartje; Justnes, Harald. (2015) The effect of sea water on the phase assemblage of hydrated cement paste. Cement & Concrete Composites
Academic article
Jensen, MM; De Weerdt, Klaartje; Johannesson, B; Geiker, Mette Rica. (2015) Use of a multi-species reactive transport model to simulate chloride ingress in mortar exposed to NaCl solution or sea-water. Computational Materials Science
Academic article
Peng, Ya; De Weerdt, Klaartje; Pedersen, Bård; Jacobsen, Stefan. (2014) Measuring sedimentation and bleeding of fresh paste with hydrostatic pressure. Nordic Concrete Research
Academic article
De Weerdt, Klaartje; Orsáková, D.; Geiker, Mette Rica. (2014) The impact of sulphate and magnesium on chloride binding in Portland cement paste. Cement and Concrete Research
Academic article
De Weerdt, Klaartje; Justnes, Harald; Geiker, Mette Rica. (2014) Changes in the phase assemblage of concrete exposed to sea water. Cement & Concrete Composites
Academic article
Peng, Ya; Jacobsen, Stefan; De Weerdt, Klaartje; Pedersen, Bård. (2014) Model and test methods for stability of fresh cement paste. Advances in Civil Engineering Materials
Academic article
De Weerdt, Klaartje; Ben Haha, M.; Le Saout, G.; Kjellsen, Knut O.; Justnes, Harald; Lothenbach, B.. (2012) The effect of temperature on the hydration of composite cements containing limestone powder and fly ash. Materials and Structures
Academic article
De Weerdt, Klaartje. (2012) 50 prosent mindre CO2-utslipp med lavkarbonsement. Murmesteren
Interview Journal
De Weerdt, Klaartje; Kjellsen, Knut O.; Sellevold, Erik Johan; Justnes, Harald. (2011) Synergy between fly ash and limestone powder in ternary cements. Cement & Concrete Composites
Academic article
De Weerdt, Klaartje; Ben Haha, M.; Le Saout, G.; Kjellsen, Knut O.; Justnes, Harald; Lothenbach, B.. (2011) Hydration mechanisms of ternary Portland cement containing limestone powder and fly ash. Cement and Concrete Research
Academic article
De Weerdt, Klaartje; Sellevold, Erik Johan; Kjellsen, Knut O.; Justnes, Harald. (2011) Fly ash-limestone ternary cements: effect of component fineness. Advances in Cement Research
Academic article
De Weerdt, Klaartje; Justnes, Harald; Kjellsen, Knut O.; Sellevold, Erik Johan. (2010) Fly ash-limestone ternary composite cements: synergetic effect at 28 days. Nordic Concrete Research
Academic article
Ben Haha, M.; De Weerdt, Klaartje; Lothenbach, Barbara. (2010) Quanfification of the degree of reaction of fly ash. Cement and Concrete Research
Academic article

Part of book/report

Lindgård, Jan; Pedersen, Bård; Oberhardt, Nikolas; Wigum, Børge Johannes; Ullnæss, Inger Lise; Aasly, Kurt. (2024) Norwegian research project on pyrrhotite in concrete aggregates – aim and status.
Academic chapter/article/Conference paper
Bagheri, Mahsa; Lothenbach, Barbara; Lindgård, Jan; Haugen, Marit Kristin; Danner, Tobias; Pedersen, Bård. (2024) Changes in the cement paste due to pyrrhotite reaction during accelerated mortar bar testing.
Academic chapter/article/Conference paper
Rønning, Terje; Lindgård, Jan; Bagheri, Mahsa; Wigum, Børge Johannes; Danner, Tobias; Weerdt, Klaartje de. (2024) Alkalis Released from Aggregates – Significance for Concrete Performance Testing. Springer
Academic chapter/article/Conference paper
Bagheri, Mahsa; Lindgård, Jan; Lothenbach, B.; Haugen, Marit Kristin; Danner, Tobias; Wigum, Børge Johannes. (2023) Changes in the cement paste due to pyrrhotite reaction during accelerated mortar bar testing .
Academic chapter/article/Conference paper
Menéndez, Esperanza; Silva, António Santos; Duchesne, Josée; Berra, Mario; De Weerdt, Klaartje; Fernandes, Isabel. (2022) RILEM TC 258-AAA Round Robin Test: Alkali release from aggregates. Critical review of the test method AAR-8.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Hemstad, Petter; Justnes, Harald; Østnor, Tone Anita; Rønning, Terje F.; Lindgård, Jan. (2022) Fundamental study on ASR kinetics - effect of temperature on aggregate reactivity and pore-water composition.
Academic chapter/article/Conference paper
Danner, Tobias; De Weerdt, Klaartje; Pedersen, Bård Magne; Lindgård, Jan. (2022) Investigations on the feasibility of the CWE method to verify potential alkali release from aggregates in Norwegian field concrete.
Academic chapter/article/Conference paper
Wigum, Børge Johannes; Lindgård, Jan; De Weerdt, Klaartje; Pedersen, Bård Magne; Rønning, Terje F.. (2022) Alkali Aggregate Reactions (AAR) in concrete. The Norwegian endeavour during more than 3 decades of research.
Academic chapter/article/Conference paper
Lindstad, Hallvard; Lindgård, Jan; Pedersen, Bård Magne; Wigum, Børge Johannes; Aasly, Kurt; Ullnæss, Inger Lise. (2022) Pyrrhotite in concrete aggregate. Introduction to mechanism, damage potential and ongoing research.
Academic chapter/article/Conference paper
Danner, Tobias; Norden, Geir; De Weerdt, Klaartje; Justnes, Harald. (2022) Low-Grade Kaolinite Clays for Sustainable Binders – Effect of mineralogy and curing temperature on hydration products.
Chapter
Justnes, Harald; De Weerdt, Klaartje; Østnor, Tone Anita. (2021) Portland Clinker-Fly Ash Cements – Relation between Compressive Strength and Microstructure. American Concrete Institute
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Geiker, Mette Rica; Plusquellec, Gilles; Lindgård, Jan; Duchsne, Josee; Fournier, Benoit. (2019) Strategies for Quantification of Alkali Metal Release from Aggregates in Concrete. Rilem publications
Academic chapter/article/Conference paper
Justnes, Harald; De Weerdt, Klaartje; Østnor, Tone Anita. (2019) Relation between strength of cements based on different clinkers and their microstructure.
Academic chapter/article/Conference paper
Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica. (2018) Carbonation-induced corrosion, impact of sampling technique on predicted service life. Rilem publications
Academic chapter/article/Conference paper
Plusquellec, Gilles; Revert, Andres Belda; Geiker, Mette Rica; Lothenbach, Barbara; De Weerdt, Klaartje. (2018) Changes in pore solution composition in mortar due to carbonation. Rilem publications
Academic chapter/article/Conference paper
Revert, Andres Belda; Geiker, Mette Rica; De Weerdt, Klaartje; Hjorth Jakobsen, Ulla. (2017) SEM-EDS analysis of products formed under natural and accelerated carbonation of concrete with CEM I, CEM II/B-M and CEM II/B-V.
Academic chapter/article/Conference paper
Danner, Tobias; De Weerdt, Klaartje; Geiker, Mette Rica. (2017) µ-XRF – CHARACTERISATION OF CHLORIDE INGRESS AND SELF-HEALING IN CRACKED CONCRETE.
Academic chapter/article/Conference paper
Revert, Andres Belda; Hornbostel, Karla; De Weerdt, Klaartje; Geiker, Mette Rica. (2017) Determination of the polarization resistance of steel in carbonated fly-ash concrete- effect of measurement technique.
Academic chapter/article/Conference paper
Machner, Alisa; Zajac, Maciej; Ben Haha, Mohsen; Kjellsen, Knut Ose; Geiker, Mette Rica; De Weerdt, Klaartje. (2017) Investigation of the products of the dolomite reaction in Portland cement pastes.
Academic chapter/article/Conference paper
Geiker, Mette Rica; De Weerdt, Klaartje; Ferreiro Garzón, Sergio; Jensen, Mads Mønster; Johannesson, Björn; Michel, Alexander. (2017) Durability testing of low clinker blends - chloride ingress in similar strength mortar exposed to seawater.
Academic chapter/article/Conference paper
Luong, Judy Yuen Wah; Aarstad, Kari; De Weerdt, Klaartje; Bjøntegaard, Øyvind. (2017) Excavated rock materials from tunnels for sprayed concrete.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Bernhardt, Markus; Geiker, Mette Rica; Skjølsvold, Ola; Kjellsen, Knut Ose. (2016) Influence of cast and cut surface on chloride ingress resistance of concrete in marine splash zone.
Academic chapter/article/Conference paper
Shi, Zhenguo; Geiker, Mette Rica; De Weerdt, Klaartje; Lothenbach, Barbara; Kaufmann, J.; Garzon, Sergio Ferreiro. (2016) Chloride resistance of Portland cement – calcined clay – limestone mortars.
Academic chapter/article/Conference paper
Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica. (2016) Investigation of the effect of partial replacement of Portland Cement by Fly Ash on carbonation using TGA and SEM-EDS. Rilem publications
Academic chapter/article/Conference paper
Shi, Z; Geiker, Mette Rica; De Weerdt, Klaartje; Østnor, Tone Anita; Lothenback, B.; Winnefeld, F.. (2016) Impact of cations on chloride binding in hydrated portland cement – metakaolin – limestone blends.
Academic chapter/article/Conference paper
Revert, Andres Belda; De Weerdt, Klaartje; Geiker, Mette Rica. (2015) Carbonation front characterization: pH colour indicators.
Academic chapter/article/Conference paper
Machner, Alisa; Bussetti, Lucie; Geiker, Mette Rica; De Weerdt, Klaartje. (2015) Critical investigation of TGA sample preparation for composite cements.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Justnes, Harald; Jakobsen, Ulla Hjorth; Geiker, Mette Rica. (2015) M-S-H formation in marine exposed concrete.
Academic chapter/article/Conference paper
Colombo, Alessia; De Weerdt, Klaartje; Geiker, Mette Rica; Justnes, Harald. (2015) Effect of fly ash on the consumption of lignosulfonate by cement paste.
Academic chapter/article/Conference paper
Lothenbach, Barbara; Durdzinski, Pawel; De Weerdt, Klaartje. (2015) Thermogravimetric Analysis. CRC Press
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Justnes, Harald. (2014) The Effect of Excessive Sea Water on the Phase Assemblage of Hydrated Cement Paste.
Academic chapter/article/Conference paper
Colombo, Alessia; Danner, Tobias ; De Weerdt, Klaartje; Geiker, Mette Rica; Justnes, Harald. (2014) Impact of mixing on early hydration of cement paste with lignosulphonate.
Academic chapter/article/Conference paper
Peng, Ya; De Weerdt, Klaartje; Pedersen, Bård; Jacobsen, Stefan. (2014) Hydrostatic pressure to measure sedimentation and bleeding.
Academic chapter/article/Conference paper
Aarstad, Kari; Østnor, Tone Anita; Kaspersen, Kristin; De Weerdt, Klaartje. (2014) Snakker ikke nok om utseendet (betongoverflater). SINTEF akademisk forlag
Popular scientific chapter/article
De Weerdt, Klaartje; Hammer, Tor Arne. (2014) Betong som ikke skiller seg. SINTEF akademisk forlag
Popular scientific chapter/article
Geiker, Mette Rica; De Weerdt, Klaartje; Hornbostel, Karla; Kioumarsi, Mohammad Mahdi; Hendriks, Max ; Larsen, Claus K. (2014) Prediction of reinforcement corrosion in concrete structures.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Ytterdal, Silje Gystad; Geiker, Mette Rica. (2014) On the impact of phase changes on chloride profiles in concrete.
Academic chapter/article/Conference paper
Geiker, Mette Rica; De Weerdt, Klaartje; Hornbostel, Karla; Kioumarsi, Mohammad Mahdi; Max, Hendriks. (2013) Levetid av armerte betongkonstruksjoner.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Colombo, Alessia; Geiker, Mette Rica. (2013) Impact of the associated cation on chloride binding in Portland cement paste.
Academic chapter/article/Conference paper
Justnes, Harald; De Weerdt, Klaartje; Geiker, Mette Rica. (2013) CHLORIDE BINDINGS IN CONCRETE EXPOSED TO SEA WATER AND SALT SOLUTIONS. Rilem publications
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Østnor, Tone Anita; Justnes, Harald; Ben Haha, Mohsen; Kjellsen, Knut Ose. (2013) Fly-ash limestone synergy in triple cement.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Geiker, Mette Rica; Justnes, Harald. (2013) 10 year old concrete wall in tidal zone examined by SEM-EDS.
Academic chapter/article/Conference paper
Peng, Ya; Jacobsen, Stefan; De Weerdt, Klaartje; Pedersen, Bård; Marstrander, Britt Blom. (2012) Overview of Rheological Parameters Affecting Stability of SCC. American Concrete Institute
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Geiker, Mette Rica. (2012) Modelling the reaction of fly ash and slag in blended cements.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Geiker, Mette Rica. (2012) Changes in the phase assemblage of concrete exposed to seawater - case study.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Geiker, Mette Rica. (2012) On the application of thermodynamic modelling for the prediction of the hydrate assemblage formed by blended cements.
Academic chapter/article/Conference paper
Justnes, Harald; Østnor, Tone Anita; De Weerdt, Klaartje; Vikan, Hedda Vestøl. (2011) Calcined marl and clay as mineral addition for more sustainable concrete structures. CI-Premier Pte Ltd
Academic chapter/article/Conference paper
Vikan, Hedda Vestøl; De Weerdt, Klaartje; Smeplass, Sverre. (2011) Rheological properties of self-consolidating concrete stabilized with fillers or admixtures. Rilem publications
Academic chapter/article/Conference paper
Vikan, Hedda Vestøl; De Weerdt, Klaartje. (2011) Rheological properties of self-consolidating concrete stabilized with fillers or admixtures.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Justnes, Harald; Lothenbach, Barbara; Ben Haha, Mohsen. (2011) The effect of limestone powder additions on strength and microstructure of fly ash blended cements. Consejo Superior de Investigaciones Científicas (CSIC)
Academic chapter/article/Conference paper
Østnor, Tone Anita; De Weerdt, Klaartje; Justnes, Harald; Bjøntegaard, Øyvind. (2011) Reactivity and microstructure of ternary cement pastes. Consejo Superior de Investigaciones Científicas (CSIC)
Academic chapter/article/Conference paper
Cepuritis, Rolands; Jacobsen, Stefan; Pedersen, Bård; Vikan, Hedda; Rudberg, Espen André; De Weerdt, Klaartje. (2011) Rheology of matrix with different crushed mineral fillers and admixtures.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Justnes, Harald; Kjellsen, Knut O.. (2011) Synergetic effect between fly ash and limestone powder in Portland composite cement.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Justnes, Harald. (2008) The reactivity of Fly Ash and Limestone in Cementitious Systems.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Justnes, Harald. (2008) Comparing Intergrinding and Separate Grinding of Blended Cements.
Academic chapter/article/Conference paper
De Weerdt, Klaartje; Justnes, Harald. (2008) Microstructure of Binder from the Pozzolanic Reaction between Lime and Siliceous Fly Ash, and the effect of Limestone Addition.
Academic chapter/article/Conference paper

Report

Danielsen, Svein Willy; Hagelia, Per; Wigum, Børge Johannes; De Weerdt, Klaartje; Aasly, Kurt; Lindgård, Jan. (2019) Magnetkis i betongtilslag. Effekt på betongs bestandighet. Nordic Concrete Research (463)
Report
De Weerdt, Klaartje; Hepsøe, Per Martin; Lindgård, Jan. (2017) Relative humidity measurements in concrete. NTNU
Masters thesis
Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica. (2017) State-of-the-art report: Service life modelling, carbonation of concrete and corrosion in carbonated concrete. NTNU
Report
De Weerdt, Klaartje; Plusquellec, Gilles; Lindgård, Jan; Wigum, Børge Johannes; Kermit, Peter Holiman. (2017) Determining alkali content in ASR performance-tested concrete. NTNU
Masters thesis
Plusquellec, Gilles; De Weerdt, Klaartje. (2017) Cold water extraction (CWE). Procedure for the determination of the alkali content and pore solution composition. NTNU
Report
Vurucu, Havvagul; De Weerdt, Klaartje; Plusquellec, Gilles. (2016) Alkali-silica reaction in concrete dams: Alkali leaching in the Votna dam. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
Masters thesis
De Weerdt, Klaartje; Geiker, Mette Rica. (2016) Workshop on Moisture in Concrete, Trondheim, Norway 6–7 February 2012. Measurement of moisture and relative humidity in concrete. FA 3 Technical performance. FA 3.2 Service life. SINTEF akademisk forlag COIN Projet report (81)
Report
De Weerdt, Klaartje; Østnor, Tone Anita; Justnes, Harald. (2015) Microstructure of clinker – fly ash interactions. COIN Projet report (69)
Report
Hammer, Tor Arne; Kjellmark, Gunrid; Smeplass, Sverre; De Weerdt, Klaartje. (2015) Practical methods to assess segregation risk of SCC on site. FA: Competitive constructions. SP 2.1 Robust and highly flowable concrete with controlled surface quality. COIN Projet report (59)
Report
De Weerdt, Klaartje; Geiker, Mette Rica; Orsakova, Denisa. (2015) Investigation of concrete from Solsvik field station - 4 concrete cores investigated after 16 years of submerged exposure. Statens vegvesens rapporter (353)
Report
Østnor, Tone Anita; Aarstad, Kari; Kaspersen, Kristin; De Weerdt, Klaartje. (2014) Brukermanual for BetongGUI – analyse og karakterisering av porer på betongoverflaten. SINTEF akademisk forlag COIN Projet report (51)
Report
Martius-Hammer, Tor Arne; Smeplass, Sverre; De Weerdt, Klaartje; Peng, Ya. (2013) Stability of SCC – robustness for changes in water content and sand grading. FA 2 Competitive constructions. SP 2.1 Robust highly flowable concrete. COIN Projet report (47)
Report
De Weerdt, Klaartje; Østnor, Tone Anita; Justnes, Harald. (2013) Fly ash – Limestone Synergy in Ternary Cements. FA 1 Environmentally friendly concrete. SP 1.1 Low carbon-footprint binder systems. COIN Projet report (46)
Report
Wirthova, Michaela; De Weerdt, Klaartje; Jacobsen, Stefan. (2013) Static yield stress measurements on SCC, mortar and matrix. NTNU, Dept of Structural Engineering
Report
De Weerdt, Klaartje; Eide, Mari Bøhnsdalen; Smeplass, Sverre; Wirthova, Micheala. (2012) The effect of stabilization with either filler or chemical stabilizer on the surface quality of concrete elements : FA 2 Competitive constructions : SP 2.1 Robust highly flowable concrete. COIN Projet report (39)
Report
Kaspersen, Kristin; Østnor, Tone Anita; Eide, Mari Bøhnsdalen; De Weerdt, Klaartje. (2012) Characterisation of concrete surfaces in Askimporten tunnel: COIN project report 45 - 2012. COIN Projet report (45)
Report
Cepuritis, Rolands; Jacobsen, Stefan; Pedersen, Bård; Vikan, Hedda Vestøl; De Weerdt, Klaartje. (2012) Rheology of matrix and SCC with different mineral fillers and admixtures : FA 2 Competitive constructions : SP 2.1 High quality manufactured sand for concrete. COIN Projet report (41)
Report
De Weerdt, Klaartje. (2011) Blended Cement with Reduced CO2 Emission - Utilizing the Fly Ash - Limestone Synergy. Tapir Akademisk Forlag Tapir Akademisk Forlag
Doctoral dissertation
De Weerdt, Klaartje; Vikan, Hedda Vestøl. (2011) Rheological properties of stabilized SCC – using fillers, admixtures or a combination : FA 2 Competitive constructions SP 2.1 Robust highly flowable concrete. COIN Projet report (38)
Report
De Weerdt, Klaartje. (2011) Nordic Concrete rheology workshop : – Trondheim, Norway 3–4 October 2011 : FA 2 Competitive constructions : SP 2.1 Robust highly flowable concrete and SP 2.3 High quality manufactured sand for concrete / Klaartje De Weerdt (editor). COIN Projet report (35)
Report
De Weerdt, Klaartje. (2011) Geopolymers – State of the art : FA 1 Environmentally friendly concrete : SP 1.1 Low carbon-footprint binder systems. COIN Projet report (37)
Report
Vikan, Hedda Vestøl; De Weerdt, Klaartje. (2010) Stability of SCC - chemical stabilisers versus filler : FA 2.1 Robust highly flowable concrete, SP 2.1.4 Workability. COIN Projet report (25)
Report
De Weerdt, Klaartje. (2007) Ternary Blended Cements with Fly Ash and Limestone. Part I: Activation of Fly Ash. State of the art. SINTEF Rapport (SBF BK A07023)
Report

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