Secondly , protective layer thickness is too thin to protect concrete reinforced bar and reduce durability.
保护层厚度不够导致钢筋外露引起锈蚀，降低了桥梁的耐久性；
The calculation method about the minimum lining thickness of concrete protective layer is given in the cold region.
提出了寒区混凝土防护层渠道最低衬砌厚度的计算方法。
The protective layer of the side wall waterproof layer and waterproof layer should be closely combined, the thickness of the protective layer shall comply with the design requirements.
侧墙卷材屋顶防水层的保护层与屋顶防水层应结合紧密、保护层厚度应吻合设计要求。
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