Water Resistance of Basic Magnesium Sulfate Cement

被引：12
|
作者：
Wu Chengyou [1 ]
Zhang Huifang [2 ]
Zhang Wuyu [1 ]
Li Hui [1 ]
Xing Sainan [1 ]
Chen Wenhai [1 ]
机构：
[1] Qinghai Univ, Sch Civil Engn, Xining, Peoples R China
[2] Chinese Acad Sci, Qinghai Inst Salt Lake, Xining, Peoples R China
来源：
INTERNATIONAL SYMPOSIUM ON MATERIALS APPLICATION AND ENGINEERING (SMAE 2016) | 2016年 / 67卷
关键词：
REACTIVITY; RATIO;
D O I：
10.1051/matecconf/20166707008
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Water resistance of basic magnesium sulfate (BMS) cement has been studied in this paper. The solubility of main hydration of 5Mg(OH)(2)center dot MgSO4 center dot 7H(2)O in BMS cement has been analyzed by analyzing ions changes in 5Mg(OH)(2)center dot MgSO4 center dot 7H(2)O solution. Compressive strength and softening coefficient changes of BMS cement after immersing in water have been tested to evaluate water resistance of BMS cement. And crystal compositions and microstructure of BMS cement before and after immersing in water has been analyzed by XRD and SEM to study the mechanism. These results show that 5Mg(OH)(2)center dot MgSO4 center dot 7H(2)O possesses a low solubility at room temperature. Basic magnesium sulfate cement displayed an excellent water resistance based on additives in basic magnesium sulfate cement can inhibit the hydration of hard burnt MgO to sheet-like Mg(OH)(2) and reduce crystallization stress in BMS cement.
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页数：9
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