Abstract
Experimental studies were performed about a long-term length change and carbonation of high strength concrete. The concretes with water-binder ratio of 15-65% were examined. The following conclusions were obtained as results of examination. 1) Length change and weight change of concrete at 6 months became so small that a water-binder ratio becomes low. 2) When the water binder ratio became low, length change of the concrete continued long time. 3) By the accelerated carbonation test, the water portoland cement ratio of the concrete that is not carbonation at 26 weeks was less than about 40%. 4) Even if accelerated carbonation test results of long-term was used, depth of carbonation could be expressed by the function of the square root of age.
