ИССЛЕДОВАНИЕ СВОЙСТВ АКТИВНЫХ МИНЕРАЛЬНЫХ ДОБАВОК ДЛЯ ПРИМЕНЕНИЯ В ГИДРОТЕХНИЧЕСКОМ СТРОИТЕЛЬСТВЕ

Abstract

Improving the technology of construction production contributes to improving the quality of construc-tion of hydraulic structures and their reliability. In recent decades, rolled compacted concrete has be-come widespread in the construction of dams in our country and in world practice. The technology of rolled compacted concrete in hydraulic engineering projects has a number of advantages: it reduces labor costs and expenses, allows fully mechanization the concreting process with implement of high-performance equipment, and thereby increases the rate of construction of massive structures. The use of mineral fillers in rolled concrete will reduce heat generation, contribute to a reduced adiabatic rise in the temperature of concrete, improve its performance and increase durability. The test method for assessing pozzolanic activity of volcanic scoria, fly ash, crushed powder of basalt and volcanic tuff by degree of absorbed lime from a saturated calcium hydroxide solution with a simultaneous change in volume is described. The studies have shown that volcanic scoria and crushed powder of basalt are additives with the lowest volume increase at the age of 30 days, they show the high pozzolanic proper-ties and can be selected as initial pozzolanic materials for production rolled compacted concrete with significant economic and environmental advantages.