Concrete is the most widely used construction material globally due to its versatility, durability, and cost-effectiveness. However, the production of conventional concrete requires a substantial amount of cement and sand, which leads to environmental concerns and depletion of natural resources. In the present study, an attempt has been made to prepare the sustainable concrete using partial replacement of cement with GGBS and sand by pond ash with glass fiber. The cement and sand have been replaced by 20% and 40% by GGBS and pond ash, respectively. A constant proportion of fiber (0.1% of cement) is added to evaluate the combined effect on properties of concrete. The experimental tests on fresh concrete (i.e., workability) and hardened concrete (i.e., compressive strength test, flexural strength test, and ultrasonic pulse velocity test) were performed to study the effect of partial replacement of GGBS and pond ash in the concrete. Based on durability, replacement of 20% cement up to 40% sand is recommended by GGBS and pond ash, respectively, together with glass fiber.