1　前言聚丙烯纤维已在加拿大、美国等国家广泛应用,其中美国希尔兄弟化学公司的杜拉纤维已打入我国市场,先后用于公路路面和桥面的修补,屋面、地下游泳池的刚性防水,地面、楼板、车道等大面积薄构件的早期防裂等,日益受到建筑行业的关注和欢迎。目前,我国已生产出用于混凝土中 1 Introduction Polypropylene fiber has been widely used in Canada, the United States and other countries, including the United States Hill Brothers Chemical Company Duola fiber has entered our market, has been used for road pavement and bridge repair, roof, underground swimming pool rigid waterproof , Floors, floors, lanes and other large areas of the early crack-resistant thin-walled components, increasingly by the construction industry's attention and welcome. At present, our country has been produced for use in concrete