The properties of fiber-vermiculite concrete composite are investigated. Analysis of the results showed that reinforcement with basalt fibers of the matrix increases the flame retardant properties. The presence of basalt fibers in the composite significantly increases the strength and flame retardant properties of the initial matrix and reduces the thickness of the flame retardant layer. The highest values of bending strength are achieved with a 0.9% reinforcement percentage and a ratio of fiber length to diameter equal to 1444.

Keywords: composite, basalt fiber, reinforcement, vermiculite concrete, dispersed, strength, bending, flame retardant properties, compression, matrix, thickness, percentage of reinforcement