Rolands Cepuritis
Materialteknisk, 3-202, Gløshaugen, Richard Birkelands vei 1a
Forskning
Microproportioning with Crushed Sand (MiKS)
Microproportioning with Crushed Sand (MiKS) is a research project, investigating the effect of crushed sand on concrete rheology.
NEWSCEM - New Supplementary Materials (SCMs) in Cement Production
The primary objective was to determine which SCMs, and combinations of SCMs, that will allow Norcem to continue to increase the use of SCMs in their products in a situation where the availability of high quality fly-ash is diminishing.
SUPERCON - Sprayed sUstainable PErmanent Robotized CONcrete tunnel lining
SUPERCON aimed to find solutions that make it possible to strengthen the "Norwegian way" of supporting tunnels as a time- and cost-effective tunnel concept, tailored to fit most rock conditions and variations in traffic density.
COIN - FA 2.3 Production of high quality manufactured aggregate for concrete
The objective was to develop a technology platform for production, mix design and use of manufactured aggregate giving concrete properties equal or better than concrete with natural sand.
Publikasjoner
Sand production with VSI crushing and air classification: Optimising fines grading for concrete production with micro-proportioning
Crushed sand fines have a large effect on fresh concrete rheological properties, which can be controlled through a concrete micro-proportioning approach, i.e. optimisation of the particle size distribution in the very fine range of the grading (⩽250 μm).
Measuring Rheological Properties of Cement Pastes: Most common Techniques, Procedures and Challenges
This technical letter describes the most common techniques and procedures used to assess the rheological properties of cement paste, as well as challenges during measurements and actions to counter these challenges.
Carbonation of calcium sulfoaluminate belite binder: mechanism and its implication on properties
This study focuses on evaluating the microstructural and mechanical alterations due to carbonation in a calcium sulfoaluminate belite (CSAB) binder system and understanding the underlying mechanism of development of the carbonation front.
Neural network predictions of the simulated rheological response of cement paste in the FlowCyl
In this study, two artificial neural networks, multi-layer perceptron and radial basis function, are trained by results of a CFD model that simulates the cement flow in the FlowCyl equipment.
[PATENT] A jointless concrete composite pavement
The present invention provides a pavement system that avoids the need for traditional contraction joints regardless of dimension of the pavement, a hitherto unknown property for exterior pavements.
Pile-Supported Slabs for Sites with Poor Geotechnical Conditions
This article summarizes the basic slab-on-pile construction process and provides results from a load test conducted on a slab constructed using shrinkage-compensating steel fiber-reinforced concrete.
Formidling
New type of crushed sand to replace natural sand in concrete production
The availability of natural sand for concrete production is facing challenges. This means that the industry has a huge need to solve this challenge by finding suitable technology for usable crushed sand production.
International team runs trials for low carbon cement in Estonia
In the spring of 2021 a full-scale clay calcination trial was carried out at one of the cement kilns of Kunda Nordic Tsement, Estonia.
Kortreist stein løser knipe
Grusforekomster blir stadig mindre tilgjengelige som materialressurs for byggenæringen. Knust fjell kan bli redningen.
2022
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Academic lecture(2022) New concrete mix-design tool for concrete micro-proportioning with manufactured sand. Svenska Betongföreningen XXIV Nordic Concrete Research Symposium 2022 , Stockholm 2022-08-16 - 2022-08-19
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Academic lecture(2022) Voids ratio of manufactured sand – influence of test method, grain shape and size distribution. Svenska Betongföreningen XXIV Nordic Concrete Research Symposium 2022 , Stockholm 2022-08-16 - 2022-08-19
2021
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Lecture(2021) Nytt verktøy for betongproporsjonering med knust sand: Resultater fra MIKS-prosjektet. Tekna / Norsk Betongforening Norsk Betongdag , Clarion Hotell, Trondheim 2021-10-20 - 2021-10-22
2020
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Academic lecture(2020) Study into “sprayability” of Sprayed Concrete for immediate rock support and permanent tunnel linings. Norsk Betongforening XXIV NORDIC CONCRETE RESEARCH SYMPOSIUM August 11th – 14th 2020, Sandefjord, Norway Utsatt pga korona , Sandefjord 2020-08-11 - 2020-08-14
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Academic lecture(2020) PACKING OF CRUSHED SAND – INFLUNECE OF TEST METHOD, GRAIN SHAPE AND SIZE DISTRIBUTION. fib - Fédération Internationale du Béton CONCRETE STRUCTURES FOR RESILIENT SOCIETY, Proceedings of the fib Symposium 2020, Edited by: Bin Zhao & Xilin Lu , 22-24 November 2020, Online, Shanghai, China, pp 126-134. 2020-11-22 - 2020-11-24
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Academic lecture(2020) Rheology modelling of matrix with filler from manufactured sand: powder surface area vs an empirical equation for micro-proportioning. Norsk Betongforening XXIV NORDIC CONCRETE RESEARCH SYMPOSIUM August 11th – 14th 2020, Sandefjord, Norway - Utsatt pga korona , Sandefjord 2020-08-11 - 2020-08-14
2019
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Academic lecture(2019) Microproportioning paste with crushed aggregate filler by use of specific surface area. 15th International Congress on the Chemistry of Cement (ICCC 2019) , Prague 2019-09-16 - 2019-09-20
2018
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Academic lecture(2018) FlowCyl: one-parameter cement paste rheology test developed at NTNU, Norway. UA-LGCgE, Arras, France International RILEM Workshop on Rheological Measurements of Cement-based Materials – IRWRMC 2018 , Arras 2018-05-30 - 2018-05-31
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Academic lecture(2018) Decreasing the Magnitude of Shear Rates in the FlowCyl. FIB - Concrete Institute of Australia The International Federation for Structural Concrete 5th International fib Congress , Melbourne 7 – 11 October 2018 2018-11-07 - 2018-11-11
2014
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Academic lecture(2014) From manufactured to engineered sand for concrete. Norwegian Concrete Association Concrete Innovation Conference (CIC2014), Oslo , Oslo 2014-06-11 - 2014-06-13
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Academic lecture(2014) From manufactured to engineered sand for concrete (10 page conference paper). Norwegian Concrete Association CIC2014 - COncrete INnovation conference , Oslo 2014-06-09 - 2014-06-11