Among major tasks involved inthe replacement of a thermai power p ] ant are the dernolishment and dismantlement of the existing plant , and the ac − companying disposal ofwastes . In disassembling and dismantling the existing plant , it is important to study a method to use members of the existing structure in their original conditions , to the maximum extent possible , In view of these circumstances , we studied [ he soundness , as a concrete material , of a rein勲 ) rced concrete cajsson

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... tion that has suffered aged deterioration , Our study revealed no such structure − re1乱ted problems as concrete cracking , alkali− aggregate reaction and reinforcement corrosion , Also , the concrete compresslve s亡 rength was higher than the design standard by a suf丘 cient margin . Based on these results, wejudged that the studieCl caissen was sound regarding