矿物掺合料抗氯离子扩散性能的试验研究

Experimental study on chloride-ion-resistance diffusion of mineral admixture

按照德国Aachen工业大学建筑材料研究所(ibac)采用的氯离子电迁移快速试验方法(RCM)测定混凝土中氯离子非稳定态快速迁移的扩散系数。试验结果表明:氯离子的扩散系数随粉煤灰、硅灰和高炉矿渣的掺量增加而降低,同时氯离子的扩散系数还与掺合料的种类有关,抗氯离子渗透能力依次为SF>SG>FA。分析并研究了粉煤灰、硅灰和高炉矿渣对混凝土抗氯离子渗透性能的影响。

This paper intends to test the non-steady-state diffusion coefficient of rapid migration according to the rapid test method on Chloride ion migration forced by electric current conducted by the architecture material institute of German Aachen Industry University. The experimental results show that the diffusion coefficient of chlorideion decreases with the rise of quantity of fly ash, silica fume and blast furnace slag, and relates to the type of the admixtures. The osmosis ability of chloride ion is as follows：SF〉SG〉FA. Finally, the effect of fly ash, silica fume and blast furnace slag on osmosis performance of anti-chloride ion in concrete is analyzed and discussed.