Degree of healthy evaluation method of concrete and repair manner null of degradation

摘要

PROBLEM TO BE SOLVED: To simply and accurately measure the deterioration depth of concrete corroded by a sulfuric acid component by utilizing the color reaction of a reagent as a sulfuric acid ion judging method. ;SOLUTION: At first, a fragile part crumbling into decay is removed by the sulfuric acid component. Next, concrete from which a core is removed is measured on the spot. The presence of sulfuric ions is judged by utilizing the color reaction of a reagent. For example, when a 0.2% aq. sol.. of chloroforfonazo III is sprayed and a 2% barium chloride aq. soln. is sprayed, the impregnation part of sulfuric ions shows a green color and a not- impregnated part shows a redish-purple color when an 0.2% aq. soln. of dimethylsulfonazo III is sprayed and a 2% aq. soln. of barrium chloride soln. is sprayed, the impregnated part of sulfuric ions shows a redish-purple color and the non-impregnated part shows a bluish-green color.;COPYRIGHT: (C)1997,JPO