protective concrete layer

基本解释

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。
To evaluate the full-span durability life of reinforced concrete structure, the expanding process of corrosive crack in protective layer concrete is studied in this paper.
为了对钢筋混凝土结构的耐久性全寿命进行评估，研究了保护层混凝土锈胀裂缝的扩展及过程。