温湿度の繰返し変化によるコンクリート用断面修復材の物質移動抵抗性の変化に関する研究

概要

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The damaged RC structures due to corrosion of embedded steel bars are usually repaired by such repair materials as polymer modified cement mortar (PCM). Compatibility in dimension, permeability, and chemical and electrochemical properties with existing concrete are required for repair materials in optimal repair system. There is, however, little information about performance of repair materials over time. In this paper changes of such properties as air permeability, water penetration and capillary water suction in PCM were investigated under cyclic accelerated environmental condition, i.e. wetting-and-drying and high-and-low temperature. The experimental results are discussed based on the change of micro-pore size distribution. The patterns of degradation of PCM are classified into two types, i.e. the deterioration in PCM matrix and the damage in surface polymer film.
社団法人日本建築学会の論文
2005-06-30