| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of controlling strength in expansive concrete using cement wherein the content rate of tricalcium silicate is below 50%, capable of estimating correctly concrete strength of an actual structure, even in the case of the expansive concrete using the cement wherein the content of C<SB>3</SB>S is below 50% and an expansive additive, whose strength control is impossible by the method of JIS A 1132. SOLUTION: In the method using the cement wherein the content of tricalcium silicate is below 50% and the expansive additive, a period until detachment of a formwork of a specimen for a strength test is set to four days or longer after the next day of a placement day. In the strength management method of the expansive concrete, the formwork of the specimen for the strength test is detached on condition that an environmental temperature until detachment of the formwork is below 30°C, and that the integrated temperature is 120(°C×day) or more. COPYRIGHT: (C)2006,JPO&NCIPI
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