硅酸盐通报2024，Vol.43Issue(4)：1380-1387,8.
掺珊瑚砂粉砂浆抗硫酸镁侵蚀性能研究
Magnesium Sulfate Attack Resistance of Mortar with Coral Sand Powder
摘要
Abstract
This paper investigated the magnesium sulfate resistance of mortar incorporating coral sand powder(CSP)combined with supplementary cementitious materials(SCMs).With erosion in magnesium sulfate(MgSO4)solution at 5 and 20 ℃ for 365 d,the magnesium sulfate attack resistance of mortar was analyzed through appearance,length change,compressive strength,X-ray diffraction pattern and Fourier transform infrared spectroscopy.It is found that the mortar with CSP deteriorates seriously when it is eroded to 365 d in magnesium sulfate solution at 5 ℃.Sulfate resistantance Portland cement(SRPC)with 20％(mass fraction)CSP exhibits better magnesium sulfate attack resistance than ordinary Portland cement(OPC)with 20％(mass fraction)CSP.Fly ash and slag can effectively improve the magnesium sulfate attack resistance of mortar with CSP at 5 ℃,while silica fume reduces the magnesium sulfate attack resistance at 20 ℃.At 5 ℃,the mortar with CSP mainly undergos magnesium and thaumasite sulfate corrosion accompanied by a small amount of gypsum generation,while at 20 ℃,magnesium and gypsum-type sulfate corrosion mainly occurs.关键词
珊瑚砂粉/硫酸镁侵蚀/碳硫硅钙石/粉煤灰/矿渣/硅灰Key words
coral sand powder/magnesium sulfate attack/thaumasite/fly ash/slag/silica fume分类
建筑与水利引用本文复制引用
马英,李淯伟,邰安..掺珊瑚砂粉砂浆抗硫酸镁侵蚀性能研究[J].硅酸盐通报,2024,43(4):1380-1387,8.基金项目
国家自然科学基金青年科学基金(51802151) （51802151）
