关键词: 透水混凝土;聚丙烯纤维;橡胶颗粒;透水系数;抗压强度

Abstract: It based on the influence factors of polypropylene fiber and rubber crumbs, researched the influence factors by measuring compressive strength and flexural strength at 28 d,the porosity, permeability coefficient of pervious concrete,and got the relationship between the dosage of polypropylene fiber and rubber particles and mechanical performance and the permeability performance of the pervious concrete.The test results showed that when the particle size is 4.75-9.5 mm,the compressive strength and the flexural strength at 28 d of the pervious concrete were improved,but the permeability coefficient were decreased.Compared with the addition of rubber crumbs,the mechanical properties of pervious concrete can be improved more obviously in adding polypropylene fiber.And with the increase of the proportion of polypropylene fiber and rubber crumbs, the increasing extent of the compressive strength and the flexural strength at 28 d of pervious concrete gradually lessen,but the permeability coefficient were decreased gradually.

Key words: pervious concrete;polypropylene fiber;rubber crumb;permeability coefficient;compressive strength