ВИЗНАЧЕННЯ МОДУЛЯ ПРУЖНОСТІ ФІБРОБЕТОНИ ПРИЗМ, ЯКІ ЗАЗНАЛИ ВПЛИВУ ПІДВИЩЕНИХ І ВИСОКИХ ТЕМПЕРАТУР

Abstract

This article describes the methodology for conducting experimental studies to determine the modulus of elasticity for fiber-reinforced concrete prisms that have been pre-heated to various temperatures. Based on the tests conducted, a comparison was made of the elastic moduli of the experimental samples with the available standard coefficients. Based on the results of experimental studies, graphs of the temperature dependence of the elastic modulus of concrete and fiber-reinforced concrete are constructed. The nature of the change in the modulus of elasticity for fiber-reinforced concrete samples is similar to ordinary concrete. Based on this, the same methodology was adopted for fiber-reinforced concrete to determine the decrease in elastic modulus as for ordinary concrete. For fiber concrete with basalt and steel fiber, coefficients were obtained that take into account a decrease in the elastic modulus.