Geopolymer is a type of material formed through a chemical reaction between aluminosilicate materials and alkaline activators. This reaction results in a network of covalently bonded atoms that form a solid glass-like structure. Geopolymers are considered environmentally friendly, as they can be made from industrial waste materials such as fly ash or slag, reducing the need for traditional Portland cement production which emits large amounts of carbon dioxide. They have a range of applications in construction, including as a binder for concrete, mortar, and coatings. Geopolymer research focuses on developing new formulations, optimizing production processes, and expanding the use of geopolymers in various industries.