МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ ВЛИЯНИЯ ЗАПОЛНИТЕЛЕЙ НА ОСНОВЕ ОТХОДОВ ГОРНОДОБЫВАЮЩИХ ПРЕДПРИЯТИИ НА ФИЗИКО-МЕХАНИЧЕСКИЕ СВОЙСТВА ТЯЖЕЛОГО БЕТОНА

Abstract

This article presents the results of mathematical modeling of the effect of the composition of heavy concrete on natural aggregates and man-made waste. Based on the obtained dependences, it was determined that cement consumption (X₁) has the strongest effect on the change in average density. Due to the rather significant difference in the densities of cement stone and aggregates based on man-made waste, this effect is quite obvious. A negative linear effect of the water-cement ratio (X₂) on the density of the composite was revealed, which is explained by an increase in the porosity of the cement stone with an increase in its water content, which subsequently leads to a decrease in the density of the material. The positive effect of changing the strength of heavy concrete with an increase in the cement content (x₁ = + 0.99) and the water-cement ratio (x₂ = + 1.9) has been established. Like most hydration-hardened concretes, an increase in the binder content has a beneficial effect on the formation of the strength characteristics of the material. It is determined that the changes in the response surfaces (Y_ρ and Y_R) have almost the same direction, as well as identical causal relationships with the input factors (X₁ and X₂). In all mixtures, a 50% ratio of factors gave a good result.