- Geopolymer is a term
covering a class of synthetic aluminosilicate materials with
potential use in a number of areas, essentially as a replacement for
Portland cement and for advanced high-tech composites, ceramic
applications or as a form of cast stone.
- Geopolymer binders and
geopolymer cements are generally formed by reaction of an
aluminosilicate powder with an alkaline silicate solution at roughly
- Geopolymer cements can
also be made from sources of pozzolanic materials, such as lava or
fly ash from coal.
- Geopolymer concrete
based on pozzolana is a new material that does not need the presence
of Portland cement as a binder.
- Since no limestone is
used as a material, geopolymer cement has excellent properties
within both acid and salt environments.
- Sea water can be used
for the blending of the geopolymer cement.
- Geopolymer materials
represent an innovative technology that is generating considerable
interest in the construction industry, particularly in light of the
ongoing emphasis on sustainability.
geopolymer cements that can be used under conditions similar to
those suitable for portland cement are the current focus of
extensive world-wide research efforts.
- The production of
versatile, cost-effective geopolymer cements that can be mixed and
hardened essentially like portland cement would represent a “game
changing” advancement, revolutionizing the construction of
starts with the alkalination step involving NaOH or KOH. Its
mechanism can be followed with MAS-NMR spectroscopy.
- The fly ash-based
geopolymer paste binds the loose coarse aggregates, fine aggregates
and other un-reacted materials together to form the geopolymer
concrete, with or without the presence of admixtures. The
manufacture of geopolymer concrete is carried out using the usual
concrete technology methods.
- Geopolymers are made
of inorganic polymers.
- The properties and
uses of geopolymers are being explored in many scientific and
industrial disciplines such as modern inorganic chemistry, physical
chemistry, colloid chemistry and in all types of engineering process
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