Recycled Waste Glass as Partial Cement Replacement in Sustainable Concrete: Mechanical and Fresh Properties Review

Cement production is one of the major sources of anthropogenic CO2 emissions in the world. In order to reduce its environmental impact, ground glass pozzolan (GGP) and other supplemental cementitious materials (SCMs) have drawn interest as potential substitutes. This review examines the potential of GGP as a SCM exploring the chemical composition of pozzolans, different types of glass used for GGP, and the impact of glass color on pozzolanic reactivity. Furthermore, the study gathers the most recent research articles on the fresh and mechanical properties of concrete including GGP, highlighting its benefits for workability, density, setting time, compressive strength, tensile strength, flexural strength, and punching strength. The results show that GGP, made from recycled waste glass, has pozzolanic properties that enhance the performance and sustainability of concrete. By incorporating GGP as a partial replacement for cement, the carbon footprint of concrete production can be lowered, supporting a circular economy and sustainable construction practices. This review paper emphasizes the technical viability and environmental advantages of using GGP in concrete, addressing the urgent need to reduce the environmental impact of cement production.