Principles of Design of Fine Carbonate Concretes with Improved Crack-Resistance

Principles of the creation of efficient fine carbonate concretes with improved crack-resistance with the use of local anthropogenic raw materials – wastes of carbonate rocks crushing both as a filler of the optimized grain composition and as a fine-disperse mineral additive, as well as the role of joint application of a limestone filler and the superplasticizer in improving the operational properties of these concretes are considered. The limestone filler and superplasticizer in the composition of a complex additive promote the uniform distribution of the cement inside the mineral matrix of the concrete that positively influences on the process of concrete hardening and formation of its structure and properties. The complex additive reduces the capillary porosity of the composite, at that the fine-disperse limestone filler provides reinforcement of the cement matrix at the micro-level. For qualitative assessment of the concrete crack-resistance, the coefficient of crack-resistance is proposed in a simple and convenient form for analyzing.

V.V. BELOV, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
P.V. KULYaEV, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Tver State Technical University (22, Afanasiy Nikitin Еmbankment, Tver, 170026, Russian Federation)

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