抄録
The use of Engineered Cementitious Composite (ECC), which has metal-like deformation and crack opening restriction ability, as a retrofit material for structures, has been the subject of high expectations. For this application, the direct spray method has been commonly accepted. This study focused on experimentally clarifying the fundamental properties of direct sprayed ECC containing high-performance polyvinyl alcohol fibers. The experiments that were performed demonstrated that direct sprayed ECC was successfully processed and showed pseudo-strain hardening performance comparable to that of traditionally cast ECC reported in the literature. Furthermore, test results simulating concrete cover cracking due to re-bar corrosion demonstrated that direct sprayed ECC has significant potential to prolong service life of R/C members in a heavy chloride environment.
