Volume 2 - Issue 3, May - June 2026

The construction industry plays a vital role in the economic development of every nation; however, it is also one of the largest contributors to environmental pollution and greenhouse gas emissions. Ordinary Portland Cement (OPC), which is the primary binding material in conventional concrete, requires a highly energy-intensive manufacturing process involving the calcination of limestone at temperatures of about 1450°C. This process releases a significant amount of carbon dioxide (CO₂) into the atmosphere. It is estimated that the production of one ton of cement generates approximately one ton of CO₂, making the cement industry responsible for nearly 7–8% of global carbon dioxide emissions. The continuous increase in cement consumption due to rapid urbanization and infrastructure development has further intensified environmental concerns such as global warming, climate change, and depletion of natural resources.In response to these environmental challenges, researchers have focused on developing sustainable and eco-friendly alternatives to conventional cement-based concrete. Geopolymer Concrete (GPC) has emerged as one of the most promising and innovative construction materials. Unlike conventional concrete, geopolymer concrete eliminates or significantly reduces the use of Portland cement by utilizing industrial by-products rich in silica (SiO₂) and alumina (Al₂O₃), such as Fly Ash and Ground Granulated Blast Furnace Slag (GGBS). These materials are generated in large quantities from thermal power plants and steel industries, and their disposal often creates environmental problems. The utilization of these industrial wastes in concrete production promotes sustainable waste management and reduces environmental pollution. The binding mechanism of geopolymer concrete differs fundamentally from that of conventional concrete. In geopolymer concrete, alumino-silicate source materials react with alkaline activators, commonly sodium hydroxide (NaOH) and sodium silicate (Na₂SiO₃), through a process known as geopolymerization. Under highly alkaline conditions, silica and alumina dissolve from the source materials and reorganize to form a three-dimensional polymeric network consisting of Si–O–Al bonds. This geopolymeric gel acts as a strong binder that effectively binds the aggregates together and contributes to the development of high mechanical strength and superior durability. Geopolymer concrete offers several advantages over conventional concrete. It significantly reduces greenhouse gas emissions and dependence on cement production while effectively utilizing industrial waste materials. In addition, geopolymer concrete exhibits high early-age strength, excellent compressive and tensile strength, low shrinkage and creep, superior resistance to sulphate and acid attacks, low permeability, and enhanced performance at elevated temperatures. These characteristics make geopolymer concrete highly suitable for structural applications, precast elements, pavements, marine structures, and other infrastructure projects. This review paper presents a comprehensive analysis of previous research studies on geopolymer concrete, focusing on material composition, polymerization mechanisms, mechanical properties, curing techniques, durability characteristics, and environmental benefits. The findings of various studies indicate that geopolymer concrete possesses significant potential to replace conventional cement concrete and can contribute substantially toward sustainable development and green construction practices. Therefore, geopolymer concrete represents an effective, durable, and environmentally responsible alternative for future construction industries.

Mr. Karan Sunil Rathod, Mr. Ishant B. Dahat,"A Review on Enhancing The Properties of Concrete by Using Alkaline Solution and It's Comparative Study With Conventional Concrete" International Journal of Advanced Multidisciplinary Research and Educational Development, V2(3): Page(1156-1161) May-June 2026. ISSN: 3107-6513. www.ijamred.com. Published by Scientific and Academic Research Publishing.