coarse aggregate

In the article, based on the literature analysis, it was shown that the particle shape, size, quantity, and ratio between the fractions of coarse aggregate affect the workability of concrete mixtures, as well as the density, strength, and durability of concrete. This applies to all types of concrete mixtures, from self-compacting (SCC) to rigid (RCC). However, studies mainly focus on cube-shaped aggregates, while crushed ones, which has a flake-like shape, is widely used in concrete. In Ukraine, quartzite crushed stone with 25–55% flake particles are used in pavement concrete.

This article proves the possibility of replacing aggregates in concrete mixtures with rubber, which is obtained by grinding used car tires. It was found that the replacement of crushed coarse aggregate in the amount of 10 vol.% with ground rubber from used car tires increases the bending strength by 23% The compressive strength does not change significantly.