钱江五桥纤维沥青混凝土桥面铺装

Fiber Asphalt Concrete Bridge Pavement in Fifth Qiantang River Bridge

为了提高钱江五桥沥青铺装的使用性能,表面层采用了纤维沥青混凝土。纤维具有加劲、吸附和增韧作用,经比较采用聚酯纤维。试验和实际使用表明,掺有纤维的沥青混凝土,在抗松散、抗水损害和抗车辙性能方面均有明显提高,使用一年多无任何病害。同时在桥面上设置盲沟,加强排水,也起到保护铺装的作用。

In order to improve performance of asphalt bridge pavement, fiber asphalt concrete has been used in fifth qiantang river bridge. Fiber has reinforcement, adsorption and toughness function. A polyester fiber was selected. Tests and practices showed that performances of fiber asphalt concrete, such as loosing resistance, moisture damage resistance and rutting resistance, were improved clearly. The bridge pavement has used for one year and its conditions were very good. On other hand, blind drains established near safety guard can drain quickly, which plays a role in protection bridge pavement.