Deterioration preventive for concrete or mortar and method for preventing deterioration of concrete or mortar

摘要

PCT No. PCT/JP97/00370 Sec. 371 Date Aug. 10, 1998 Sec. 102(e) Date Aug. 10, 1998 PCT Filed Feb. 13, 1997 PCT Pub. No. WO97/30005 PCT Pub. Date Aug. 21, 1997The present invention provides a deterioration inhibitor for concrete or mortar which does not pollute water and which, in a small amount, can prevent the deterioration of concrete or mortar due to sulfur oxidizing bacteria for a long time, and also provides a method of inhibiting the deterioration of concrete or mortar which uses the deterioration inhibitor. A phthalocyanine compound is an effective component of the deterioration inhibitor for concrete or mortar. In the method of inhibiting the deterioration of concrete or mortar, the phthalocyanine compound is added to concrete or mortar.