Dispersion Reinforcement of Cement Systems by Amorphous Glass–Metal Fibers
摘要
Fibers are fabricated from a Co69Fe4Cr4Si12B11 alloy glass covered amorphous microwire. They have two types of sizes: the diameter is D = 17 and 50 μm and the length is 7 and 15 mm, respectively. The influence of their geometric parameters and concentration (0.5–3%) and the method of introduction on the mobility, the average density, and the bending and compressive strengths of cement systems (mortars) has been studied. The bending strength of the cement system is found to increase by 54% in the case of its reinforcement with amorphous glass–metal fibers of diameter D = 17 μm in an amount of 0.5% of the Portland cement weight and by 22% in the case of reinforcement with fiber of diameter D = 50 μm in an amount of 1%. The compressive strength changes insignificantly herewith. The introduction of fibers increases the crack resistance coefficient of the cement systems under study from 0.098 to 0.116–0.164.