开级配胶粉改性沥青混凝土替代碎石盲沟应用于桥梁中面层的研究

Research on Application of Modified Asphalt Concrete with Open-graded Rubber Powder Instead of Gravel Blind Ditch in Surface Course of Bridge

桥梁排水孔附近沥青混凝土中面层常常采用碎石代替,用以提高桥面的排水能力。本项目采用开级配胶粉改性沥青混凝土替代碎石,在保证正常排水的前提下提高该区域的力学性能,延长桥梁使用寿命。

The surface course in asphalt concrete near the drain hole of bridge is often replaced by gravel, so as to improve the drainability of bridge deck. The modified asphalt concrete with open-graded rubber powder is adopted in this project to replace gravel, the mechanical property of this area is improved in the premise of guaranteeing the normal drainage, and the service life of bridge is prolonged.