| 摘要 |
PROBLEM TO BE SOLVED: To estimate highly accurately in a short-term material age, a concrete dry shrinkage factor in a long-term material age, in order to control concrete shrinkage crack caused by concrete dry shrinkage. SOLUTION: In this method, a drying period calculation reference period required for reaching a concrete dry shrinkage factor which is a half of the final concrete dry shrinkage factor is set from a change-with-time characteristic coefficient determined by multiplying a factor exerting an influence on the concrete dry shrinkage as a coefficient. An extrapolation primary complementary coefficient is determined based on the drying period calculation reference period and one piece of short-term drying period measured data. The concrete dry shrinkage factor at an optional drying period-elapsed time after the drying period calculation reference period is estimated from the drying period calculation reference period and the extrapolation primary complementary coefficient. COPYRIGHT: (C)2008,JPO&INPIT
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