矿渣对氯离子的固化作用

The Binding Effect of Slag on the Chloride Ions

为研究矿渣本身对氯离子的固化作用,以石灰作为激发剂制备出硬化矿渣浆体,采用化学分析方法测定了矿渣固化氯离子的能力。结果表明:矿渣不但具有化学结合氯离子的能力,还具有物理吸附氯离子的能力,其固化等温线适合Freundlich关系曲线;随着pH值增大,矿渣固化氯离子的能力降低,其下降的幅度比硅酸盐水泥更大;与硅酸盐水泥不同,随着温度升高,矿渣固化氯离子的能力增强。

In order to investigate chloride binding in slag,hardened slag paste was prepared using lime as activators.Chloride binding ability of slag was detected by equilibrium method.The results show that,slag not only has the ability to chemically combine chloride ions,but also has physical adsorption ability to chloride ions.The chloride binding isotherm of slag shows a good fit to Freundlich-type adsorption.As the pH increasing,chloride binding ability of slag decreased,and the tendency of decrease was greater than the Portland cement.Different with Portland cement,as the temperature increasing,chloride binding ability of slag increased.