高强高性能混凝土在沈阳除冰盐环境下的氯离子扩散行为

Chloride diffusion of HSC-HPC exposed to de-icing salt condition in Shenyang

采用化学分析,测定了高强混凝土(HSC)和高性能混凝土(HPC)在3种氯盐暴露环境中的自由氯离子分布规律。结果表明:HSC-HPC的抗氯离子扩散行为并不取决于其抗压强度的大小,而与活性掺合料的种类和掺量密切相关,掺加粉煤灰(FA)能够降低其氯离子扩散速度,掺加硅灰(SF)将使其氯离子扩散速度提高。分析指出,HSC尤其是掺加FA的HPC,非常适合于东北地区恶劣的露天除冰盐环境。

Using chemical analysis, distributing rule of free chloride in high strength concrete（HSC）and high performance concrete（HPC）in three kinds of de-icing salts environments is measured. Results indicate that：The anti-chlorine diffusion capability of HSC-HPC is not determined by stress strength, but relates to what kind of mixture and its quantity, mixing fly ash（FA） can reduce diffused velocity of chloride. Silica fume（SF） increases chloride diffused velocity, Analysis indicates that, HSC, espe cially HPC that mixed FA. suits for the atrocious de-icing salts environment of North-east district.