PVA及玄武岩纤维对水泥基复合材料力学性能的影响.

The physical and mechanical properties of cement-based materials can be improved by adding fiber. However, the influence of organic-inorganic hybrid fibers on the properties of cement materials is seldom studied. In this paper, mechanical properties of cement-based materials with single PVA fiber, single basalt fiber and two kinds of fiber were tested. The results showed that when only 1.6% short PVA fiber was added, the mechanical properties of cement-based materials were improved the best. The flexural strength of cement-based materials decreased by 7%, the compressive strength increased by 31% and the flexural ratio decreased by 24%. With only 0.3% basalt fiber staple, cement-based materials showed the best improvement in mechanical properties, with the flexural strength reduced by 8%, the compressive strength increased by 15.7% and the flexural strength decreased by 20%. When adding 0.3% short basalt fiber and 0.5% short PVA fiber, the flexural strength of cement-based composites had little effect, but the compressive strength was significantly improved, and the flexural compression ratio was relatively reduced, which showed the best comprehensive performance. [ABSTRACT FROM AUTHOR]