海洋环境中混凝土桥的钢筋防锈技术

Technical Countermeasures for Rust-resistence of Rebar in RC Bridge under Marine Environment

混凝土内部的高碱性能使钢筋表面形成一层钝化膜 ,保护钢筋免受锈蚀。然而 ,混凝土对钢筋的保护作用及其有效时间决定于混凝土的保护层厚度、混凝土质量、接触氯盐 (来自原材料和环境 )状况等因素。本文对海洋环境中混凝土桥的钢筋锈蚀原因进行了分析 ,并提出了相应的技术对策。

The high alkalescence inside the concrete will form a passivation membrane for the rebar surface to protect it from being corroded. However, the protection function and valid time of the concrete to the rebar depend on such factors as the thickness of the coating, quality of the concrete and contact chlorine salt(from raw material and environment). This paper analyses the rust of rebars in the RC bridge under marine environment and puts forward corresponding technical countermeasures.