不同尺度钢纤维混杂增强水泥基材料的力学性能研究

he mechanical properties of micro-diameter steel wool and medium-diameter steel hybrid fiber reinforced cement-based materials are investigated. At a constant fiber volume fraction，the increase of mechanical properties gained by hybrid fiber is higher than the mon-diameter fiber reinforced cement-based materials. Different size hybrid fiber shows distinct synergistic effects of bending strength and toughness of cement-based materials. The S/B is an importance factor of mechanicals properties of fiber reinforced cement-based materials. With the increase of S/B, it needs more medium-diameter steel fiber to substitute micro-diameter fiber in hybrid fiber system. The hybrid system of two different diameter fiber can gain distinct hybrid effects in fracture and toughness of cement-based materials.