Geopolymer composition, a method for preparing the same and its uses

摘要

A geopolymer composition for use as a cement or concrete is provided, the composition comprising: (a) fly ash (FA); (b) ground granulated blast-furnace slag (GGBS); and (c) high-magnesium nickel slag (HMNS) and an activator. The composition may comprise a filler such as aggregate, an allotrope of carbon, a rubber, an elastomer or a plant material. A method for forming a geopolymer composition is also provided, the method comprising: providing a geopolymer precursor comprising: (a) fly ash (FA); (b) ground granulated blast-furnace slag (GGBS); and (c) high-magnesium nickel slag (HMNS); combining components (a) to (c) with an activator, the activator may comprise a silicate and a base in solution in a solvent; and allowing the resulting mixture to cure. The filler may be one or more allotropes of carbon, in particular a carbon nanostructure material, for example nanotubes, nanobuds and nanoribbons which may be added in a solvent such as acetone. The geopolymer composition finds use in form a wide range of construction components and structures. Also disclosed is a method of electrically heating the geopolymer and of detecting flaws in the geopolymer by measuring electrical conductivity.