为设计构造高性能再生透水混凝土,在混凝土中以一定的掺入量(2%、4%、6%、8%和10%)分别掺入玄武岩纤维、棉纤维、碳纤维和聚丙烯纤维,通过测试新型透水混凝土的坍落度、密度、渗水系数和抗压强度来确定最佳纤维掺入量。结果表明:纤维的掺入能够使得混凝土的坍落度下降;棉纤维、碳纤维和聚丙烯纤维对混凝土密度有着明显改善,而玄武岩纤维效果最差;纤维的掺入能够提高透水混凝土的渗水系数;各种纤维在一定的掺量下能够提高混凝土的抗压强度,但当超过一定量时,混凝土的抗压强度则逐渐下降。研究表明,在4种纤维中,棉纤维能够使得混凝土具有较高的抗压强度,因此建议在透水混凝土中掺入6%的棉纤维为最佳。

To design the construction of high performance recycled permeable concrete,basalt fiber,cotton fiber,carbon fiber and polypropylene fiber are respectively mixed into concrete with a certain amount (2%,4%,6%,8% and 10%),determine the optimum fiber content by testing the slump,density,permeability coefficient and compressive strength of the new permeable concrete.The results show that:the incorporation of fiber can reduce the slump of concrete;cotton fiber,carbon fiber and polypropylene fiber significantly improve the density of concrete,while basalt fiber is the worst;the incorporation of fiber can improve the permeability coefficient of pervious concrete;all kinds of fibers can improve the compressive strength of concrete at a certain amount,but when the amount exceeds a certain amount,the compressive strength of concrete gradually decreases.The researches show that among the four kinds of fibers,cotton fiber can make the concrete have high compressive strength,so it is suggested that 6% cotton fiber is the best.