This study aims to evaluate the performance of silica fume (SF) and nano-silica (NS) on enhancing the sulfuric acid resistance of mortar mixtures. The NS and SF were added as substitutions for cement at various dosages. The cured samples were immersed in the sulfuric acid solution with a pH of 2 for 75 d. A compressive strength test and absorption and voids tests were conducted before sulfuric acid immersion. It was found that the addition of SF and NS reduced the volume of permeable voids and increased compressive strength. A thermo-gravimetric analysis was carried out to investigate the hydration of mixtures. The mixtures with SF showed a higher level of pozzolanic reaction compared with mixtures with NS. After the 75 d of immersion, the mixtures with 5% SF and 1% NS showed the best resistance against sulfuric acid because they showed the lowest mass change and length change.

这项研究旨在评估硅粉（SF）和纳米二氧化硅（NS）在增强砂浆混合物耐硫酸性方面的性能。添加了NS和SF以各种剂量替代水泥。将固化的样品浸入pH为2的硫酸溶液中75 d。在硫酸浸没之前进行抗压强度测试和吸收和空隙测试。发现添加SF和NS减少了可渗透空隙的体积并增加了抗压强度。进行热重分析以研究混合物的水合。与含NS的混合物相比，含SF的混合物表现出更高的火山灰反应水平。浸泡75天后，