Use of Clay Tile Chips as Coarse Aggregate in Concrete

Roof of majority of old buildings in Kerala is constructed with Mangalore pattern clay tiles. Hence, a large amount of broken clay tiles are produced during the demolition of these old buildings. In this study, the potential of using the broken clay tiles as aggregate in concrete is studied. The crushed natural stone aggregate in concrete is replaced by 25, 50, 75 and 100% by volume. The control mix containing natural aggregate and mix with clay tile aggregates partially or fully replaced prepared in the laboratory and tested. The compressive strength, modulus of elasticity, modulus of rupture, tensile strength were determined. The test results indicated that replacement of natural aggregate by 25% by volume with the broken clay tile can be recommended. Thereafter, the reduction in the strength is found to be significant. (paper)