This document investigates the durability parameters of different grades of concrete. It studies parameters like water absorption, water absorptivity, oxygen permeability, and chloride permeability. The study aims to evaluate the effect of water-to-cement ratio and cement content on durability indices. It prepares different concrete mixtures with varying water-to-cement ratios (0.35, 0.5, 0.65) and cement contents (300, 350, 400 kg/m3) and tests them for compressive strength and various durability parameters. The results show that lower water-to-cement ratios and higher cement contents provide higher compressive strength and improved durability as measured by durability test indices. However, the