セメントの初期水和におけるCa(OH)_2の過飽和溶解

概要

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As a measure of supersaturation with respect to Ca(OH)2 in the solution of portland cement paste, W/C=0.6, a saturation ratio was used, which was defined by the ratio of actually determined product m′Ca2+⋅m′2OH- to the solubility product, both in molalities, at the same ionic strength. For three of five cements examined, there was seen the time correspondance between the occurrence of maximum saturation ratio of about 3 and the beginning of intensive rise of heat liberation rate. This was ture for the cement paste with or without addition of soluble salt after pre-leaching treatment of cement with a large amount of water. For the other two cements, the maximum saturation ratio was established in an hour, while the rise of heat liberation rate was two to three hours late.
社団法人日本セラミックス協会の論文
1974-06-01