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Article

The Effect of the Composition of a Concrete Mixture on Its Volume Changes

1
Faculty of Civil Engineering, Institute of Technology of Buildings Materials and Components, Brno University of Technology, Veveri 331/95, 602 00 Brno, Czech Republic
2
Department of Material Disintegration, Institute of Geonics of the CAS, Studentska 1768, 708 00 Ostrava, Czech Republic
*
Author to whom correspondence should be addressed.
Academic Editors: Dolores Eliche Quesada and Sukhoon Pyo
Materials 2021, 14(4), 828; https://doi.org/10.3390/ma14040828
Received: 28 November 2020 / Revised: 29 January 2021 / Accepted: 3 February 2021 / Published: 9 February 2021
(This article belongs to the Section Construction and Building Materials)
The presented research aims to clarify the specific effect of the individual components of concrete with Portland cement CEM I 42.5 R on the volume changes of concrete. The effect of the filler component was evaluated from the point of view of the composition and type of aggregate (crushed versus mined) and from the point of view of the mineralogical composition of the aggregate. Concrete formulas with a maximum aggregate grain size of 16 and 22 mm were assessed. The effect of the binder component on the shrinkage of the concrete was monitored on the concrete mixtures produced using the same aggregate and maintaining the same strength class of concrete, C 45/55. The effect of the addition of finely ground limestone, finely ground granulated blast furnace slag and coal high-temperature fly ash was monitored. It was found that the maximum aggregate grain and the type of grading curve do not have a significant effect on the volume changes of concrete. Concretes with mined aggregates showed lower shrinkage than concretes with crushed aggregates. The most significant is the effect of the type of aggregate on the volume changes in the first 24 h. Mineral additives have a positive effect on the elimination of the volume changes of concrete, while the addition of high-temperature fly ash proved to be the most suitable. View Full-Text
Keywords: concrete; volume changes; shrinkage; crushed and mined aggregate; finely ground limestone; finely ground granulated blast furnace slag; coal high-temperature fly ash concrete; volume changes; shrinkage; crushed and mined aggregate; finely ground limestone; finely ground granulated blast furnace slag; coal high-temperature fly ash
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MDPI and ACS Style

Ťažký, M.; Bodnárová, L.; Ťažká, L.; Hela, R.; Meruňka, M.; Hlaváček, P. The Effect of the Composition of a Concrete Mixture on Its Volume Changes. Materials 2021, 14, 828. https://doi.org/10.3390/ma14040828

AMA Style

Ťažký M, Bodnárová L, Ťažká L, Hela R, Meruňka M, Hlaváček P. The Effect of the Composition of a Concrete Mixture on Its Volume Changes. Materials. 2021; 14(4):828. https://doi.org/10.3390/ma14040828

Chicago/Turabian Style

Ťažký, Martin, Lenka Bodnárová, Lucia Ťažká, Rudolf Hela, Milan Meruňka, and Petr Hlaváček. 2021. "The Effect of the Composition of a Concrete Mixture on Its Volume Changes" Materials 14, no. 4: 828. https://doi.org/10.3390/ma14040828

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