Effects of UV Radiation on the Carbonation of Cement-Based Materials with Supplementary Cementitious Materials

Solar light with high-energy ultraviolet (UV) radiation acting on the surface of cement-based materials easily changes properties by affecting their carbonation reaction. In order to elucidate difference in process under UV different supplementary cementitious (SCMs), depth (apparent pH values), chemical composition (XRD, FTIR, and TG analysis), mechanical (compressive strength microhardness) were evaluated. The results revealed that accelerated reaction, which enhanced decrease rate formation stable calcite, thereby improving macromechanical micromechanical materials. addition, differs according added SCM. particular, silica fume substantially increased radiation, resulting a 53.3% increase calcium carbonate coverage, 10.0% compressive strength, 20.9% mean microhardness, whereas incorporation blast furnace slag resulted smaller effect irradiation-induced carbonation. facilitates crystallographic transformation containing metakaolin, more crystals products. This study provides theoretical framework serves as an important reference for design strong practical engineering applications.