This document summarizes an experimental study on the performance of fly-ash interlocking bricks. Fly ash, stone dust, and sand were used to cast interlocking bricks in varying proportions. The bricks were then tested at 14, 28, and 90 days to determine compressive strength, water absorption, and density. The results found that compressive strength initially increases with fly ash content up to a maximum point and then decreases. Water absorption increases with higher fly ash content. Density of the bricks was 7.5-25% higher than conventional clay bricks. The study concludes that fly ash bricks can provide sufficient strength for construction use and are a viable recycling alternative to traditional clay bricks.