Geopolymer concrete (GPC) has emerged as a revolutionary alternative to conventional cement-based concrete in response to growing environmental concerns and the need for sustainable construction materials. Traditional concrete relies heavily on Ordinary Portland Cement (OPC) as a binder, the production of which contributes significantly to global carbon dioxide (CO₂) emissions. It is estimated that cement manufacturing alone accounts for nearly 7–8% of total global CO₂ emissions. To address this issue, researchers and engineers have developed geopolymer concrete, which eliminates the use of cement and instead utilizes industrial by-products such as fly ash and Ground Granulated Blast Furnace Slag (GGBS) as binding materials. The fundamental principle behind geopolymer concrete is the process of geopolymerization. This is a chemical reaction between alumina-silicate materials (like fly ash and GGBS) and alkaline activators such as sodium hydroxide (NaOH) and sodium silicate (Na₂SiO₃). When these materials react, they form a three-dimensional polymeric chain and ring structure consisting of Si–O–Al bonds, which provides strength and durability to the concrete. Unlike conventional hydration in OPC concrete, geopolymerization is faster and can produce higher early strength, especially under heat curing conditions. In addition to its environmental benefits, geopolymer concrete exhibits excellent engineering properties. It offers high compressive strength, low shrinkage, and superior resistance to aggressive environmental conditions such as acid attack, sulphate attack, and chloride ingress. These properties make GPC highly suitable for infrastructure projects, marine structures, and areas exposed to harsh environmental conditions. However, despite these advantages, there are still some limitations, such as variability in source materials, the need for alkaline activators, and challenges in large-scale field applications.