保水性セラミックブロックの打ち水効果の持続性

抄録

In recent years, heat management by a temperature reduction effect, such as a water sprinkling effect, is strongly desired because of suppression of global warming. In this study, in order to evaluate the sustainability of the water sprinkling effect of pavement blocks, we attempted to clarify the evaporation performance from the inside of the blocks by the viewpoint of wettability. Specifically, the wettabilities were analyzed by measurement of static and dynamic contact angles and of the pavement blocks with different surface porous spaces. Water evaporation properties were measured from the fully water-containing block. As a result of sustainability of water evaporation, the ceramic block, which has a small porous space and a slow water absorption rate, was capable of transport water from the wetting sand to the inside, and had the ability to transport the inside water to the evaporation surface. In order to maintain the water sprinkling effect of the paving block, the water diffusion behavior for maintaining the sustainability of water evaporation on the surface layer is important, and the water inside the block is diffused to the surface. It was found from these results that it is necessary to absorb moisture from the external environment on the block surface.