Peer-reviewed articles 17,970 +


Dr. Lenka Scheinherrova; Michal Benes; Milan Steffek; Dr. Jitka Krejsova; Robert Cerny
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Green building materials are gaining attention for achieving carbon neutrality in civil engineering. To reduce CO2 emissions from cement, using low-cement or cement-free materials with local supplementary cementitious materials (SCMs) is promising. Blended cements with SCMs enhance long-term strength, but low-clinker blends often have low early strength. To address this, understanding the hydration of ordinary Portland cement is crucial. While C3S has been studied, the role of C3A, the most reactive component of cement, has been explored less. This study aims to produce C3A in laboratory conditions, assessing the effects of calcination temperature and time on its composition and morphology. The C3A samples are prepared using the empirically computed amounts of CaCO3 and Al2O3. The proposed design aims to produce pure cubic C3A, with up to 3 wt.% of unreacted CaO and no mayenite C12A7 as side products. The results obtained demonstrated that the duration for which the maximum temperature is maintained before extracting the samples from the furnace is a crucial factor that exerts the most significant influence on the presence of mayenite in the C3A structure. The synthesized C3A will then be added into blends, and its impact on early strength will be evaluated. The findings from this study have the potential to provide valuable insights for designing and producing more environmentally friendly cements, with a specific focus on achieving superior early strength performance.
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[2.] Snellings, R., Suraneni, P., Skibsted, J., Future and emerging supplementarycementitious materials, Cement and Concrete Research, vol. 171, pp 107199,2023.
[3.] Sharma, M., Bishnoi, S., Martirena, F., Scrivener, K., Limestone calcined claycement and concrete: A state-of-the-art review, Cement and Concrete Research,vol. 149: pp 106564, 2021.
[4.] John, E., Lothenbach, B., Cement hydration mechanisms through time–a review,Journal of Materials Science, vol. 58, pp 9805-9833, 2023.
[5.] Scrivener, K.L., Matschei, T., Georget, F., Juilland, P., Mohamed, A.K.,Advances in hydration and thermodynamics of cementitious systems, Cementand Concrete Research, vol. 174, pp 107332, 2023.
[6.] Zunino, F., Scrivener, K.L., Recent advances in understanding the hydrationof limestone calcined clay cements (LC3). in Further Reduction of CO2-Emissions and Circularity in the Cement and Concrete Industry, 16thInternational Congress on the Chemistry of Cement 2023-ICCC2023. 2023.Thailand Concrete Association.
[7.] Minard, H., Garrault, S., Regnaud, L., Nonat, A., Mechanisms and parameterscontrolling the tricalcium aluminate reactivity in the presence of gypsum,Cement and Concrete Research, vol. 37, pp 1418-1426, 2007.
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[9.] Myers, R.J., Geng, G., Rodriguez, E.D., da Rosa, P., Kirchheim, A.P., Monteiro,P.J., Solution chemistry of cubic and orthorhombic tricalcium aluminatehydration, Cement and Concrete Research, vol. 100, pp 176-185, 2017.
[10.] Barnes, P., Bensted, J., Structure and performance of cements. 2002: CRC Press.
[11.] Quennoz, A., Hydration of C3A with calcium sulfate alone and in the presenceof calcium silicate. Thesis, 2011, EPFL.
[12.] Zunino, F., Scrivener, K.L., The influence of sulfate addition on hydrationkinetics and C-S-H morphology of C3S and C3S/C3A systems, Cement andConcrete Research, vol.160, pp 106930, 2022.
[13.] Doebelin, N., Kleeberg, R., Profex: a graphical user interface for the Rietveldrefinement program BGMN, Journal of applied crystallography, vol. 48, pp1573-1580, 2015.
[14.] Scheinherrova, L., Krejsova, J., Benes, M., Steffek, M., Cerny, R., Laboratorysynthesis of C3A on the kilogram scale: Preliminary results. In Journal ofPhysics: Conference Series (Vol. 2628, No. 1, p. 012026). IOP Publishing, 2023.
The presented work was financially supported by the Czech Science Foundation underproject GA23-06157S. The authors also thank Michal Dvorak for his kind guidance andsupport.
Proceedings of 23rd International Multidisciplinary Scientific GeoConference SGEM 2023
23rd International Multidisciplinary Scientific GeoConference SGEM 2023, 28-30 November, 2023
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference-SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
28-30 November, 2023
tricalcium aluminate, C3A, calcination temperature, mineral composition, morphology

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