Abstract: The composite silicate cementing systems with 0%, 5% and 10% (mass fraction) cement replacement ratio by silica fume were immersed in 10% (mass fraction) sodium sulfate and weak alkaline solution for 210 d, the attack products and contents were studied. The attack products were characterized by XRD, SEM and EDS. The contents of gypsum in composite silicate cementing system with silica fume were calculated by using K value, the contents of free and total sulfate ion in composite silicate cementing system with silica fume were determined by spectrophotometry. The results show that the main attack products of composite silicate cementing system with silica fume are gypsum and ettringite in 10% sodium sulfate and weak alkaline solution, and the formation of attack products causes the specimen to expand and crack. The contents of free and total sulfate ion and the attack product in composite silicate cementing system with silica fume obviously decrease, and the expansion rates decrease with the increase of silica fume. Silica fume has a certain improvement effect on the expansion of composite silicate cementing system with silica fume.
李 燕,杨旭光,孙道胜,王爱国,刘开伟. 弱碱环境下硅灰复合硅酸盐胶凝材料体系硫酸盐侵蚀产物[J]. 《材料导报》期刊社, 2017, 31(24): 26-29.
LI Yan, YANG Xuguang, SUN Daosheng, WANG Aiguo, LIU Kaiwei. Sulfate Attack Product of Composite Silicate Cementing System with Silica Fume in Weak Alkaline. Materials Reports, 2017, 31(24): 26-29.
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2017, Vol. 31 
