Review of Self Compacting Geopolymer Concrete Using Slag Sand as Fine Aggregate

The manufacture of ordinary Portland cement produces a lot of CO2s in the atmosphere. The production of cement emits approximately 5% of worlds carbon. Carbon dioxide emissions from the cement industry are a major environmental concern, which is increasing day by day searching for an alternative replacement for cement has become very important. Self-compacting concrete (SCC) offers advantages in complex formwork and congested reinforcement, but its reliance on Portland cement raises environmental concerns. Geopolymer concrete is an eco-friendly construction material that utilizes industrial by-products such as fly ash, ground granulated blast furnace slag, rice husk ash, and metakaolin as binders. Recycling these waste materials for construction offers a sustainable solution to environmental concerns and presents a cost-effective building alternative. This review explores the potential of integrating the self-compacting properties of SCC with the sustainability of GPC by using slag sand as a fine aggregate. It examines key aspects such as workability, mechanical strength, durability, and microstructure of SCC-GPC incorporating slag sand. Additionally, it highlights the challenges, existing research gaps, and future research directions in this area.