A study on a simple evaluation method for sulfuric acid resistivity of acid-resistant cementitious materials

对污水处理厂等与硫酸腐蚀有关的结构中胶凝材料的耐酸电阻率的简单评价方法进行了实验和分析研究。结果发现，可以通过水泥水合物粉与硫酸反应时硫酸溶液pH值的变化来预测水泥水合物因硫酸而变质。然而，在劣化预测中，必须考虑水泥水合物的孔隙结构，其对劣化率的影响不容忽视。

A simple evaluation method of the acid resistivity of cementitious materials used for structures which are concerned about sulfuric acid deterioration, such as sewage treatment plants, was investigated experimentally and analytically. As a result, it was found that the deterioration prediction of cement hydrates due to sulfuric acid can be made from the changes of the value of pH in sulfuric acid solution where pulverized cement hydrates were reacted with sulfuric acid. In the deterioration prediction, however, the pore structure of cement hydrates must be considered since its effect on the deterioration rate cannot be negligible.