| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a concrete product having neither thermal expansion nor reduction in long-term mechanical strength even by abrupt heating cure. SOLUTION: A kneaded concrete mixed with a component to form ettringite is molded, the atmosphere temperature of the mold is rapidly heated to >=75 deg.C, heated and cured at the atmosphere temperature for 1.5 hour at the longest, hardened and the mold is removed. Otherwise, the mold is put in a heating atmosphere set to >=65 deg.C in advance, heated and cured at the atmosphere temperature for 1.5 at the longest and the mold is removed. |
