MECHANICAL PROPERTIES OF HYBRID FIBER REINFORCED RECYCLED SELF-COMPACTING CONCRETE

摘要

The mechanical properties and hybrid effect of self-compacting concrete (SCC) with basalt fiber, polyvinyl alcohol (PVA) fiber and polypropylene fiber were investigated.According to the experimental results, the incorporation of recycled aggregate result in the reduction of the compressive strength and splitting tensile strength;the incorporation of 0.9kg/m3 polypropylene fiber, 0.9kg/m3 PVA fiber or 4kg/m3 basalt fiber lead to the reduction of the compressive strength, but the increasing of the splitting tensile strength of recycled SCC.The incorporation of any two kinds of basalt-, polypropylene-and PVA fibers can significantly improve the splitting tensile strength of concrete.There is no obvious difference between the incorporation of three kinds or two kinds of fiber at the same time on mechanical properties of the concrete.However, the workability performance reduced remarkably when three kinds of fiber incorporated in the SCC at the same time.