BASIC PHYSICAL PROPERTIES OF POROUS CONCRETE USING WASTE ROOF TILES

Abstract

Waste roof tile is expected as concrete aggregate of recycled resources. Moisture content of the waste roof tile is about five times the height of normal coarse aggregate. The moisture content influences making and quality of concrete, but that have an effect of water-retention of porous concrete. Using waste roof tile possessed excellent water absorption and retention as a coarse aggregate of porous concrete is expected to improve the water retention performance of porous concrete. The aim of this study is to comprehend for basic physical properties of a porous concrete using waste roof tiles. Study Items are determining propriety the production of the porous concrete with required performances, various performances by tests using specimens and water retention performance of porous concrete using waste roof tiles. As the result, the porous concrete using waste roof tiles was found out possible to secure predetermined porosity. And also, it is no problem as porous concrete pavement for the sidewalks judging from these strength. Furthermore, porous concrete using waste roof tiles as coarse aggregate is about twice water retention compared with porous concrete using normal coarse aggregate. In the future, mitigation of heat island effect by porous concrete improving water retention performance is required verification at examination of outdoor.