Abstract
To find out the re-deterioration mechanism by the water absorption and the constraint stress evolution at patch repair region, water absorption coefficient of repair materials which is on the relative moisture content condition was measured by the Bolzmann-Matano analysis method. Re-emulsification type polymer resin was adopted in the polymer modified cement mortar (PCM) used as repair materials. The Two-dimensional coupled analysis (FEM) of the water absorption, volume change by moisture, and mechanical properties was attempted to estimate qualitatively the stress increment occurring at the patch repair region such as repair materials, substrate and interface. The cracking mechanism after repair and the selection method of repair materials were discussed.
