geopolymer
Sign in to savethumb|SEM image of a geopolymer granule prepared from metakaolin by alkaline activation to be further used as a sorbent. A geopolymer is an inorganic, often ceramic-like material, that forms a stable, covalently bonded, non-crystalline to semi-crystalline network through the reaction of aluminosilicate materials with an alkaline or acidic solution. Many geopolymers may also be classified as alkali-activated cements or acid-activated binders. They are mainly produced by a chemical reaction between a chemically reactive aluminosilicate powder e.g. metakaolin or other clay-derived powders, natura
Article
26 sectionsContents
- Composition
- Geopolymer synthesis
- Covalent bonding
- Oligomer formation
- Geopolymer 3D-frameworks and water
- Commercial applications
- Geopolymer cements and concretes
- Geopolymer resins and binders
- Arts and archaeology
- Research on Geopolymers
- Geopolymer cements
- Alkali-activated materials vs. geopolymer cements
- User-friendly alkaline-reagents
- Examples of materials that are sometimes called geopolymer cements
- {{CO2}} emissions during manufacturing
- The need for standards
- Health effects
- Geopolymers as ceramics
- Room-temperature processed materials
- Thermal processing of geopolymers to produce ceramics
- Geopolymer applications in arts and archaeology
- Egyptian pyramid stones
- Roman cements
- See also
- References
- External links
thumb|SEM image of a geopolymer granule prepared from metakaolin by alkaline activation to be further used as a sorbent. A geopolymer is an inorganic, often ceramic-like material, that forms a stable, covalently bonded, non-crystalline to semi-crystalline network through the reaction of aluminosilicate materials with an alkaline or acidic solution. Many geopolymers may also be classified as alkali-activated cements or acid-activated binders. They are mainly produced by a chemical reaction between a chemically reactive aluminosilicate powder e.g. metakaolin or other clay-derived powders, natural pozzolan, or suitable glasses, and an aqueous solution (alkaline or acidic) that causes this powder to react and re-form into a solid monolith. The most common pathway to produce geopolymers is by the reaction of metakaolin with sodium silicate, which is an alkaline solution, but other processes are also possible.
The term geopolymer was coined by Joseph Davidovits in 1978 due to the rock-forming minerals of geological origin used in the synthesis process. These materials and associated terminology were popularized over the following decades via his work with the Institut Géopolymère (Geopolymer Institute).