protective concrete layer

基本解释

Secondly , protective layer thickness is too thin to protect concrete reinforced bar and reduce durability.
保護層厚度不夠導致鋼筋外露引起鏽蝕，降低了橋梁的耐久性；
The calculation method about the minimum lining thickness of concrete protective layer is given in the cold region.
提出了寒區混凝土防護層渠道最低襯砌厚度的計算方法。
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.
爲了對鋼筋混凝土結搆的耐久性全壽命進行評估，研究了保護層混凝土鏽脹裂縫的擴展及過程。