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桥面板上的覆盖层,一般由防水层和沥青混凝土磨耗层所组成,对桥梁的寿命具有十分的重要性。防水层保持桥面混凝土板表面免遭冻融和化冰雪化学剂侵蚀。桥面防水层是必不可少的,因为人工操作的桥面混凝土板很少具有抗冻融的能力,并在使用化冰雪的化学剂时,能限制临界氯离子浓度(水泥重量的0.4％)渗入的深度小于20mm的不透水性。
Bridge deck cover, generally composed of waterproof layer and asphalt concrete wear layer, the life of the bridge is of great importance. The water-repellent layer keeps the deck slab surface free of freeze-thaw and chemical attack of snow and ice. Deck waterproofing is essential because manually operated bridge deck slabs rarely have resistance to freezing and thawing and limit the critical chloride concentration (0.4% by weight of the cement) when using chemical agents that convert ice and snow, Seepage depth of less than 20mm impermeability.