Effect of Stearic Acid on Ettringite Formation

查看全文 作　　者：Essam A.KisharDepartment of Chemistry, Faculty of Girls, Ain Shams University, Cairo, Egypt [ Manuscript received March 29, 2001, in revised form June 11, 2001]

出　　处：《Journal of Materials Science & Technology》索引2002年第18卷第3期,共3页

摘　　要：The hydration reaction of a mixture of tricalcium aluminate (C3A) and gypsum with the molar ratio of 1:3 was carried out at room temperature and a water/solid ratio of 4.0. The hydration was carried out in presence of 0, 1 and 3% stearic acid and the mixes were designated as A, B and C, respectively. Ettringite was the only hydration product formed in the presence and absence of stearic acid. Phase composition, microstructure, infra-red analysis as well as degree of hydration were carried out for the different hydration mixtures. The rate of ettringite formation in the presence of 3% stearic acid was accelerated during the first half hour of hydration, and then retardation was occurred. In the presence of 1% stearic acid the ettringite formation was accelerated first till 3 days, then retardation was observed at later hydration ages. 关键词：硬脂酸水合作用钙矾石室温条件

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Effect of Stearic Acid on Ettringite Formation

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