桥面铺装层混凝土掺用聚丙烯纤维的工程应用

结合某大桥桥面铺装层混凝土工程，阐述了聚丙烯纤维混凝土的特性及其工作机理。在桥面铺装层混凝土中掺用聚丙烯纤维能够增强其抗拉、抗折、抗渗、抗冲击能力，并起到阻裂增韧的作用。对该桥桥面铺装层混凝土掺用聚丙烯纤维后的配合比进行了试验设计，现场试验和观测结果表明，对该桥桥面铺装层混凝土掺用聚丙烯纤维进行改性是非常有益的，该桥桥面铺装层聚丙烯纤维混凝土工程的设计和施工是成功的。

Application of Polypropylene Fiber Concrete in Deck Paving of a Bridge

In respect to the deck paving of a certain bridge, the properties and working mechanism of polypropylene fiber concrete are clarified in this paper. The use of polypropylene fiber in concrete of the bridge deck paving can improve its tensile strength, bending strength, permeability strength, impact ductility, cracking resistance and toughness. The ratio of polypropylene fiber and the bridge deck paving concrete is worked out by experiment. On-the-spot tests and observed results show that the use of polypropylene fiber into the concrete of bridge deck paving is very beneficial to the improvement of performance, and that the design and construction of the bridge deck paving polypropylene fiber concrete is successful.