ВЛИЯНИЕ ЗОЛЫ ГИДРОУДАЛЕНИЯ НА СВОЙСТВА ТЯЖЕЛОГО БЕТОНА ДЛЯ СТРОИТЕЛЬСТВА ДОРОЖНОГО ПОКРЫТИЯ

Abstract

Cement concrete covering is characterized by considerable durability, compared to others. But due to the high construction costs, it is not popular in Russia. To reduce costs in the construction of cement concrete pavement it is proposed to replace part of the cement, or part of the cement and sand in equal proportions simultaneously with pond ash. The paper presents the test data of heavy concrete with pond ash at different concepts of component replacement (replacement of 10% of cement; 7.5% of cement and 7.5% of sand). The effect of ash from pond ash of CHPP-4 of Omsk was studied. Omsk on the following properties of heavy concrete: strength, water absorption, density, frost resistance, abrasion. It was shown that the introduction of pond ash can have a positive effect on the strength of heavy concrete at late hardening periods (90 and 180 days). A radiographic analysis of heavy concrete with pond ash and a control ashless sample was carried out. It was found that at the introduction of pond ash into heavy concrete, pozzolanic reaction takes place, the product of which are calcium hydrosilicates. The formation of calcium hydrosilicates has a positive effect on the properties of heavy concrete. The use of pond ash as a component of heavy concrete reduces its cost and improves the environmental situation in the country.