Alkali-Activated Material
AssigneeLiverpool John Moores University
InventorsMonower SADIQUE, Abdullah KADHIM
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Abstract
A geopolymeric composition for forming an alkali-activated concrete material, the geopolymeric composition comprising metakaolin (MK), a source of calcium oxide and a source of aluminosilicate other than metakaolin (MK). A method for forming an alkali-activated concrete material and the use of such an alkali-activated concrete material are also described.
Claims21
A composition for forming an alkali-activated concrete material, the composition comprising a geopolymeric composition, water and an aggregate, wherein the geopolymeric composition comprises metakaolin (MK), a source of calcium oxide and a source of aluminosilicate other than metakaolin (MK).
A method of forming an alkali-activated concrete material, the method comprising:
- (1) mixing a geopolymeric composition, water and an aggregate to obtain a concrete mix;
- and
- (2) curing the concrete mix obtained in step (1);
- wherein the geopolymeric composition comprises metakaolin (MK), a source of calcium oxide and a source of aluminosilicate other than metakaolin (MK).
A composition according to claim 1, wherein the geopolymeric composition comprises from 25 wt % to 35 wt % of metakaolin (MK).
A composition according to claim 1, wherein the source of calcium oxide is bypass dust (BPD), suitably wherein geopolymeric composition comprises from 25 wt % to 35 wt % of bypass dust (BPD).
A composition according to claim 1, wherein the source of aluminosilicate other than metakaolin (MK) is natural pozzolan (NP), suitably wherein the geopolymeric composition comprises from 30 wt % to 50 wt % of natural pozzolan (NP).
A composition according to claim 1, wherein the metakaolin (MK) comprises from 45 to 60 wt % silicon dioxide and/or from 30 to 50 wt % aluminium oxide.
A hybrid binder composition comprising a geopolymeric composition according to claim 1 and cement, preferably OPC.
An alkali-activated concrete material derived from a geopolymeric composition, water and an aggregate, wherein the geopolymeric composition comprises metakaolin (MK), a source of calcium oxide and a source of aluminosilicate other than metakaolin (MK);
- wherein the alkali-activated concrete material has a compressive strength of at least 10 M Pa as measured by compression testing.
Dependencies are inferred from the claim text.