Encyclopedia of Engineering Geology

Living Edition
| Editors: Peter Bobrowsky, Brian Marker

Geopolymers

  • Brant Walkley
Living reference work entry
DOI: https://doi.org/10.1007/978-3-319-12127-7_299-1

Synonyms

Definition

A broad class of materials produced by the reaction of an alkali solution and an aluminosilicate powder which can bind other materials (e.g., aggregate) into a hardened, cohesive mass.

In contrast to traditional cements , the aluminosilicate powder used in geopolymers is not hydraulic (i.e., does not harden through the addition of water) and contains little, if any, calcium oxide. Consequently, the aluminosilicate powder must be activated by reaction with an alkali solution to form a hardened binder. Geopolymers exhibit technical characteristics which often meet or exceed those of traditional Portland cement, with far lower CO2emissions. Consequently, the dominant application for geopolymers is in use as a sustainable construction material. Other applications include use in zeolite synthesis, sol-gel processing, radioactive waste immobilization, biomaterials,...

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References

  1. Duxson P, Fernández-Jiménez A, Provis JL, Lukey GC, Palomo A, van Deventer JSJ (2007) Geopolymer technology: the current state of the art. J Mater Sci 42(9):2917–2933CrossRefGoogle Scholar
  2. Habert G, Ouellet-Plamondon C (2016) Recent update on the environmental impact of geopolymers. RILEM Tech Lett 1(7):17–23.  https://doi.org/10.21809/rilemtechlett.2016.6 CrossRefGoogle Scholar
  3. Palomo A, Grutzeck MW, Blanco MT (1999) Alkali-activated fly ashes: a cement for the future. Cem Concr Res 29(8):1323–1329CrossRefGoogle Scholar
  4. Provis JL, van Deventer JSJ (2009) Geopolymers – structure, processing, properties and industrial applications. Woodhead Publishing, CambridgeGoogle Scholar
  5. Provis JL, Duxson P, Lukey GC, van Deventer JSJ (2005) Statistical thermodynamic model for Si/Al ordering in amorphous aluminosilicates. Chem Mater 17(11):2976–2986CrossRefGoogle Scholar

Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  1. 1.Department of Materials Science and EngineeringThe University of SheffieldSheffieldUK