Formation and stability of 3CaO center dot CaCl2 center dot 12H(2)O

Authors
Citation
C. Shi, Formation and stability of 3CaO center dot CaCl2 center dot 12H(2)O, CEM CONCR R, 31(9), 2001, pp. 1373-1375
Citations number
6
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Material Science & Engineering
Journal title
CEMENT AND CONCRETE RESEARCH
ISSN journal
0008-8846 → ACNP
Volume
31
Issue
9
Year of publication
2001
Pages
1373 - 1375
Database
ISI
SICI code
0008-8846(200109)31:9<1373:FASO3C>2.0.ZU;2-Y
Abstract
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 slu rry from Ca(OH)(2)-CaCl2-H2O System was examined under different conditions . X-ray diffraction (XRD) analysis indicates that 3CaO-CaCl2. 12H(2)O canno t be detected in the original slurry, but is detected after acetone washing of the slurry. 3CaO . CaCl2. 12HO disappears when the acetone-washed sampl e is air-dried at 20 degreesC and 20% relative humidity. Thus, cautions sho uld be taken during the preparation of samples during the examination of ca lcium chloride attacked concrete. (C) 2001 Elsevier Science Ltd. All rights reserved.