摘 要：以煅烧后粉煤灰为耐酸粉料，水玻璃为胶结料制作耐酸腐蚀砂浆。以不同浓度和种类的酸液模拟酸性介质环境进行酸性腐蚀试验，参照GB 50212-2014中对于水玻璃混凝土的相关要求，通过检测试块抗压强度及质量损失率确定试块的耐酸性能。研究得到耐酸腐蚀性能较优的水玻璃砂浆配方，初步验证了粉煤灰作为耐酸粉料制作水玻璃砂浆的可行性。以扫描电镜观察试块经腐蚀处理后的内部结构，并通过XRD分析其构型，对粉煤灰中各成分与水玻璃所产生的反应进行了讨论，得出了以粉煤灰为耐酸粉料的水玻璃砂浆的耐酸机理。
Abstract: The experiment used sodium silicate as the adhesive part of the new cement mortar according to its special principle of solidification. Different kinds and concentrations of acid were used to simulate the acidic condition, and a test on compressive strength and residual weight was used to identify the corrosion resistance of the sample according to GB 50212-2002. An orthogonal test showed that a formula with a best corrosion resistance which proved that using fly ash as acid-resisting powder in sodium silicate cement mortar was practicable. Scanning electron microscope was used to observe the cross profile of the sample, combined with a powder X-ray diffraction (XRD) to analyse its internal structure changes. The statistics showed that fly ash was mainly made up of mullite, which contains Al-O bonds and Si-O bonds, and some metal oxides combined with them, Si-O bonds from sodium silicate made them more stable, their combination improved the concrete’s compressive strength.