A study of the optimal percentage of Waste Foundry Sand to be used in Concrete with 15% Ceramic tile waste replacing coarse aggregate was done. Previous researches into the use of Ceramic tiles in substitution of Coarse aggregate in concrete have placed the optimum percentage around 15-20%. With this in mind, an investigation was carried out to establish the suitability of replacing fine aggregate in the ceramic blended concrete with Waste Foundry sand and its ramifications on the strength properties of the concrete.

The crushed ceramic tiles replaced 20mm crushed natural stone whereas the waste Foundry sand replaced natural river sand.

In this study Waste foundry sand was blended with fine aggregate in portions of 10% 20% 30% and 40% replacement. The corresponding strength of each sample was taken. The results showed that the replacement of 20% had the highest strength and stability characteristics. The results also confirmed a decrease in workability with increasing waste foundry sand content.