Brief Introduction of Geopolymer Concrete
Keywords
Geopolymer Concrete, Alkali Activator, Sodium Silicate, Fly Ash
Geopolymer concrete is a kind of concrete formed by mixing silicon-aluminum raw materials (metakaolin, fly ash, slag, etc.), coarse and fine aggregates, and alkali activators (NaOH solution, Na2SiO3 solution, etc.) in appropriate proportions through geopolymerization. A green low-carbon new building material. Geopolymer concrete has relatively excellent mechanical properties, corrosion resistance, high temperature resistance, etc.
Geopolymer is an inorganic polymer with three-dimensional network structure composed of AlO4 and SiO4 tetrahedral structural units. It is amorphous to semi-crystalline and belongs to non-metallic materials. This material has excellent mechanical properties, acid and alkali resistance, fire resistance and high temperature resistance. It has the possibility of replacing ordinary Portland cement and can use mineral waste and construction waste as raw materials. It is used in building materials, high-strength materials, sealing materials etc. There are applications in nuclear solid waste materials, and high temperature resistant materials.
Raw materials
Natural minerals containing aluminosilicate substances (such as metakaolin), industrial solid waste (such as fly ash, slag, steel slag, red mud and various tailings, etc.) are the main materials;
Alkali Activator
A technical term for alkali-activated gelling materials, called catalysts in chemistry. Generally refers to caustic alkali, silicate, aluminate, phosphate, sulfate, carbonate and other substances containing alkaline elements.
