EXPERIMENTAL STUDY ON DETERIORATION OF CONCRETE DUE TO ACID RAIN AND DETERIORATION CONTROL BY SURFACE COATING

An experimental study is carried out for three consective years on volcanic acid rain effect on concrete specimens with and without cracks. Also at the same time the effective protection for coating material are investigated. And the following results are obtained; (1) The acid rain causes yellowish coloring to the surface of concrete. (2) Although the acid rain do not causes neutralization but accelerates the corrosion of rebar. (3) There's a high probability that the acid rain causes surface deterioration to the coating materials. (4) When sutaible coating material is used the surface deterioration of concrete can be prevented effectively.