This document summarizes an experimental investigation into the effects of partially replacing cement with fly ash in rubberized concrete. Concrete mixes were prepared with 0%, 10%, and 20% fly ash replacement of cement and 5% rubber replacement of coarse aggregate. Testing showed that workability decreased with rubber and 10% fly ash but increased with 20% fly ash. Compressive strength initially decreased but then increased with higher fly ash percentages. The study aims to promote more sustainable concrete production by utilizing waste materials like rubber and fly ash.