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Formation and stability of 3CaO dot CaCl2 dot 12H2O
Formation of 3CaO dot CaCl2 dot 12H2O, 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-H 2O system was examined under different conditions. X-ray diffraction (XRD) analysis indicates that 3CaO dot CaCl2 dot 12H 2O cannot be detected in the original slurry, but is detected after acetone washing of the slurry. 3CaO dot CaCl2 dot 12H2O disappears when the acetone-washed sample is air-dried at 20 degree C and 20% relative humidity. Thus, cautions should be taken during the preparation of samples during the examination of calcium chloride attacked concrete.
Formation and stability of 3CaO dot CaCl2 dot 12H2O
Formation of 3CaO dot CaCl2 dot 12H2O, 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-H 2O system was examined under different conditions. X-ray diffraction (XRD) analysis indicates that 3CaO dot CaCl2 dot 12H 2O cannot be detected in the original slurry, but is detected after acetone washing of the slurry. 3CaO dot CaCl2 dot 12H2O disappears when the acetone-washed sample is air-dried at 20 degree C and 20% relative humidity. Thus, cautions should be taken during the preparation of samples during the examination of calcium chloride attacked concrete.
Formation and stability of 3CaO dot CaCl2 dot 12H2O
Shi, Caijun (author)
Cement and Concrete Research ; 31 ; 1373-1375
2001
3 Seiten, 6 Quellen
Article (Journal)
English
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