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防水层的作用是防止由面层渗入的水进入桥面而破坏桥面板和腐蚀主梁钢筋,保证和延长桥梁的使用寿命。同时,防水层作为桥面铺装的一个结构层,又必须满足层间抗剪的要求。所以,作为桥面铺装防水层材料必须满足以下七个方面的要求:良好的不透水性能;与混凝土桥面和沥青面层有足够的粘结力;面层碾压后的无破损性;不低于面层设计寿命的耐久性;良好的耐高温和低温性能;对桥面准备状况有良好的适应性;抵御桥面裂缝的良好延伸性能。
The role of the waterproof layer is to prevent water infiltration from the surface into the bridge deck and the destruction of the bridge deck and corrosion of the main beam steel to ensure and extend the service life of the bridge. At the same time, waterproof layer as a bridge deck pavement structure, but also must meet the requirements of anti-shear layer. Therefore, as the bridge deck waterproofing material must meet the following seven requirements: Good impermeability; with the concrete deck and asphalt surface have enough adhesive force; surface layer without damage after rolling damage; Not less than the durability of the design life of the surface layer; good high temperature and low temperature performance; have good adaptability to the deck preparation condition; and resist the good extension performance of the deck cracks.