海边暴露环境下混凝土抗氯离子渗透性试验研究

Experimental Study of Resistance of Concrete to Chloride Ion Permeability under Sea Environment

对不同配合比的混凝土试件,在海边大气区、潮汐区、水下区进行暴露试验,同时测定氯离子含量随深度变化曲线。试验结果表明,实际海边暴露环境下混凝土的损伤程度大小为潮汐区>水下区>大气区,试件内氯离子含量随着暴露龄期的增加而增加,随时间水胶比的增加而减小。对于水胶比相同的混凝土试件,掺入粉煤灰等矿物掺合料可以有效提高混凝土抵抗氯离子侵入的性能。

Concrete Elements with different proportion were tested under exposure to sea air zone, tidal zone and underwater environment. Meanwhile, the curves of chloride Ion content with deep change were measured. The result showed that the degree of injury of the concrete sample was tidal zone underwater air zone under sea exposure environment. The content of chloride increased with prolongation of sea exposure period, and depressed in pace with increase of water/cement ratio. The concrete mixed with mineral admixtures such as fly ash could effectively heighten concrete performance on anti-chloride for the sample under the condition of same water cement ratio.