Geopolymers and geopolymer aggregates
AssigneePolyagg Pty Ltd
InventorNicholas John Willis
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Abstract
The invention relates to geopolymer compositions, geopolymers and methods for their production and use. The geopolymers may be used as aggregates, and those aggregates may be used in concrete manufacture. The geopolymer composition comprises fly ash or a fly ash substitute, an aluminum phyllosilicate, an alkaline component and water, wherein the water is present at an amount of about 6% to about 10% by weight of the composition. The geopolymers are made by forming a geopolymer composition as described above, compacting the mixture by applying pressure of about 50 to about 90 kgf/cm2; and curing the compacted mixture to form the geopolymer.
Claims30
A geopolymer composition comprising fly ash or a fly ash substitute, an aluminium phyllosilicate, an alkaline component and water, wherein the water is present at an amount of about 6% to about 10% by weight of the composition and the alkaline component is present at an amount of about 6% to about 10% by weight of the composition and the alkaline component is an alkali metal hydroxide.
A geopolymer comprising a cured, compacted combination of fly ash or fly ash substitute, an aluminium phyllosilicate, an alkaline component and water, wherein the water constituted 6% to 10% by weight of the combination prior to curing, the alkaline component is present at an amount of about 6% to about 10% by weight of the combination prior to curing and the geopolymer has a density of at least about 1.40 q/cm3.
A method for producing a geopolymer comprising:
- i) combining fly ash or fly ash substitute, an aluminium phyllosilicate, an alkaline component and water to form a mixture, wherein the water is present at an amount of about 6% to about 10% by weight of the mixture and the alkaline component is present at an amount of about 6% to about 10% by weight of the mixture;
- ii) compacting the mixture by applying a pressure, wherein the pressure applied is at least about 50/kgf/cm2;
- and
- iii) curing the compacted mixture to form the geopolymer.
Dependencies are inferred from the claim text.