Influence of dispersed reinforcement on frost resistance of high-strength basalt concrete

¹ RUDN University, 6 Miklukho-Maklaya St, Moscow, 117198, Russia
² Moscow State University of Civil Engineering, 26, Yaroslavskoye shosse, Moscow, 129337, Russia
³ Peter the Great St. Petersburg Polytechnic University, 29 Polytechnicheskaya St, St. Petersburg, 195251, Russia

^* Corresponding author: okolnikova_ge@mail.ru

Abstract

This work is devoted to the study of the influence of various types of dispersed reinforcement of basalt fiber on increasing the frost resistance of high-strength modified basalt concrete. The article presents the results of experimental studies of one composition of coarse aggregate concrete modified with the admixture "Embelit 8-100" and three compositions of basalt fiber concrete. 3 types were considered as dispersed reinforcement: mono-reinforcement with basalt fiber of 24 mm length – soft fiber, mono-reinforcement with basalt micro-reinforcement of 25-40 mm length – stiff fiber, poly-reinforcement with a mixture of soft and stiff fiber in a ratio of 1:1. According to the test results, experimental values of physical and mechanical characteristics of coarse aggregate high-strength concrete and basalt fiber concrete with three types of dispersed reinforcement (at the age of 7, 14, 28 days) were determined: cube strength, concrete compressive strength class, elastic modulus, frost resistance grade concrete. The analysis of the effect of different types of dispersed reinforcement on increasing the strength and frost resistance of coarse aggregate basalt concrete modified with the admixture "Embelit 8-100" was also carried out. The conclusion is made about the prospects of using mono-reinforcement in the form of soft basalt fiber to increase the frost resistance of high-strength basalt concrete.