Study of Physical and Mechanical Properties of Fiber Concretes with Different Compositions

The article touches upon the development of dispersed reinforced concrete components and the improvement of their physical and mechanical properties, which can be used in road and defense structures, bridges, and takeoff and landing zones, i.e. To study the properties of dispersed reinforced concrete with basalt fibers, according to the standard requirements, water permeability and strength determination tests were carried out by changing the type and amount of additives used and the length and quantitative content (concentration) of basalt fibers. Multifunctional micro-reinforced fine-grained concrete compositions have been developed based on basalt fiber, where the limit of compression strength varies from 65.6 to 78.35MPa, flexural strength from 6.4 to 9.1MPa, and water permeability from 3.7 to 1.8%. Among the compositions of micro-reinforced concrete with basalt fiber, the best strength result was recorded in the case of 2% basalt fiber and 10% micro silica, with compression and flexural strengths of 78.35 and 9.1MPa, respectively. The best water absorption result of 1.8% was obtained only with basalt fiber concrete when the fiber content was increased to 3.2%. As a result, water absorption was reduced by 62% compared to the initial concrete. The increases in flexural and compression strengths were 42.19% and 13.8%, respectively.