The document discusses the use of waste glass powder, fly ash, and GGBS as partial replacements for cement in concrete. The objectives are to determine the optimal percentage replacements and their effects on the mechanical properties and durability of concrete. The methodology describes tests conducted to evaluate the workability, compressive strength, split tensile strength, flexural strength, pullout strength, water absorption, rebound hammer test, and chloride permeability of concrete mixtures with varying replacement levels of cement. The results show improvements in strength and durability up to 15% replacement, with workability decreasing as the percentage of replacements increases.