For the purpose to study about the characteristics of the process of the corrosion-induced deterioration detected on surface of RC wall with mortar finish, RC wall specimens were electrified and measured the amount of the deteriorations as crack, delamination and spalling by hammer and visual examination periodically. From the results, in the case the cover thickness was small, the delamination increased with the progress of the rebar corrosion, which behavior were not liner but agogics. And in the case the cover thickness was large, the cracks along the rebar increased on mortar surface with the progress of the rebar corrosion.

For proffer the authorization standard of the act on facilitation reconstruction of deteriorated RC condominium buildings, studied on evaluation methods and criteria about buildings having the risk of falling cover concrete caused by rebar corrosion that exist in a wide. The approach is integrating the deterioration grade of the member of the buildings by visual examination. Through trial and case study used real aging RC condominium buildings, suggested evaluation methods could estimate the grade of rebar corrosion occurred on the exterior of the RC buildings. *1 国土技術政策総合研究所建築研究部 主任研究官・博士(工学) (〒 305-0804 茨城県つくば市立原 1) *2 国土技術政策総合研究所建築研究部 室長・博士(工学) *3 (国研)建築研究所材料研究グループ 研究員・博士(工学) *4 (国研)建築研究所材料研究グループ 主任研究員・博士(工学) *5 (国研)建築研究所材料研究グループ グループ長・博士(学術) *6 (国研)建築研究所材料研究グループ シニアフェロー・博士(工学) *7 (国研)建築研究所材料研究グループ 客員研究員・博士(工学) *8 ㈱八洋コンサルタント *9 ㈱八洋コンサルタント *10 (一社)建築研究振興協会