Formation and stability of 3CaO•CaCl2•12H2O

被引：33
|
作者：
Shi, C [1 ]
机构：
[1] CJS Technol Inc, Burlington, ON L7M 2Z2, Canada
来源：
CEMENT AND CONCRETE RESEARCH | 2001年 / 31卷 / 09期
关键词：
formation; stability; X-ray diffraction; 3CaO-CaCl2 center dot 12H(2)O;
D O I：
10.1016/S0008-8846(01)00576-2
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Formation of 3CaO . CaCl2. 12H(2)O, which is a very unstable complex salt, in deteriorated concrete attacked by calcium chloride has been regarded as a main cause for the deterioration of cement concrete. In this study, a slurry from Ca(OH)(2)-CaCl2-H2O System was examined under different conditions. X-ray diffraction (XRD) analysis indicates that 3CaO-CaCl2. 12H(2)O cannot be detected in the original slurry, but is detected after acetone washing of the slurry. 3CaO . CaCl2. 12HO disappears when the acetone-washed sample is air-dried at 20 degreesC and 20% relative humidity. Thus, cautions should be taken during the preparation of samples during the examination of calcium chloride attacked concrete. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1373 / 1375
页数：3
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