Fly ash, a Source of Fireproof Concrete?

(Aggregate Research 5-27-09) Research by William Rickard and colleagues at the Curtin University of Technology (CUT), Perth, has shown that fly ash-based geopolymers exhibit remarkable fire resistance while maintaining superior mechanical strength. The team has made geopolymers, a cement-like material formed by dissolving materials that contain silicon and aluminium, such as fly ash, in a highly alkaline solution for use in high temperature applications such as fireproofing and building insulation. Rickard, who has been concentrating on high temperature applications of fly ash geopolymers, said he became interested in the field after reading of their engineering and environmental potential. "We have found the geopolymers have great fire resistance."