材齢20年における圧縮強度80～180N/mm~2級の 高強度コンクリートの諸物性

摘要

Mechanical properties of 80 to 180MPa class high strength concrete at the age of 20 years were examined. Conclusions are as follows. (1)Long-term strength development ratio of high strength concrete is increased when water-binder ratio becomes low.(2) Drying shrinkage ratio of high strength concrete increases between the age of 10 years and the age of 20 years.(3) Core strength and rebound number of mock up column with high strength concrete are also increased by increase of the age.(4)Elastic modulus and poisson's ratio at the age of 20 years can be estimate by conventional estimate equation.(5) Carbonation has not occurred to surface of mock up column with high strength concrete at the age of 20 years.%長期的に保管している高強度コンクリートの試験体を用いて,最長材齢20年の試験を行った結果,以下の結論を得た.1)本実験の方法で養生した20℃封かん養生供試体であっても,圧縮強度は材齢の経過とともに増加する傾向にあった.