# US 2018/0022646 A1 · Particulate compositions for the formation of geopolymers, their use and methods for forming geopolymers therewith, and geopolymers obtained therefrom > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0022646 A1 - Document ID: US20180022646A1 - Status: Published application - Kind: A1 - Application number: 15/553,691 - Filed: 2016-02-29 - Published: 2018-01-25 - Earliest claimed: 2015-02-27 - Assignees: Imerys Ceramics France - Applicants: Imerys Ceramics France - Inventors: Alexandre AUTEF - Web page: https://patentgrep.com/patent/US20180022646A1 ## CPC - C04B 28/006: {containing mineral polymers, e.g. geopolymers of the Davidovits type} - C04B 12/005: {Geopolymer cements, e.g. reaction products of aluminosilicates with alkali metal hydroxides or silicates} - C04B 18/02: Agglomerated materials {, e.g. artificial aggregates} - C04B 40/0042: {Powdery mixtures} - Y02P 40/10: Production of cement, e.g. improving or optimising the production methods; Cement grinding - Y02W 30/91: Use of waste materials as fillers for mortars or concrete - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS - Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT ## Abstract The present invention relates to dry particulate composition for forming a geopolymer, comprising an alkali metal hydroxide, an alkali metal silicate, and an aluminosilicate. The invention further relates to methods for forming geopolymers and geopolymers formed according to said methods or using the said dry particulate compositions. ## Claims ### Claim 1 A dry particulate composition for forming a geopolymer, comprising: (i) an alkali metal hydroxide, (ii) an alkali metal silicate, and (iii) an aluminosilicate, wherein at least 45 wt.-% of the aluminosilicate is in an amorphous state, based on the total weight of aluminosilicate in the composition, and the aluminosilicate has a product of the specific surface area in m2/g and the amorphous phase content in the range from 1 to 15. ### Claim 2 (depends on 1) A dry particulate composition according to claim 1, wherein at least 50 wt.-% of the aluminosilicate is in an amorphous state. ### Claim 3 (depends on 1) A dry particulate composition according to claim 1, comprising from 1 wt.-% to 25 wt.-% alkali metal hydroxide, from 15 wt.-% to 50 wt.-% alkali metal silicate, and from 30 wt.-% to 80 wt-% aluminosilicate, expressed as a proportion of the total weight of the dry particulate composition. ### Claim 4 (depends on 1) A dry particulate composition according to claim 1, wherein the said alkali metal hydroxide is selected from the group consisting of NaOH, KOH, LiOH, RbOH, CsQH, and mixtures thereof. ### Claim 5 (depends on 1) A dry particulate composition according to claim 1, wherein the alkali metal of the said alkali metal silicate is selected from the group consisting of Na, K, Li, Rb, Cs, and mixtures thereof. ### Claim 6 (depends on 1) A dry particulate composition according to claim 1, wherein said aluminosilicate is selected from the group consisting of metakaolin, fly ash, halloysite, metahalloysite, slag, rock dust, fine sand, activated clay, kaolin, mica, fine feldspar and mixtures thereof. ### Claim 7 (depends on 1) A dry particulate composition according to claim 1, wherein at least 50 wt.-% of said aluminosilicate is in an amorphous state, based on the total weight of aluminosilicate in the composition and said aluminosilicate has a product of the specific surface area in m2/g and the amorphous phase content in the range from 5 to 15. ### Claim 8 (depends on 1) A dry particulate composition according to claim 1, wherein at least 70 wt.-% of said aluminosilicate is in an amorphous state, based on the total weight of aluminosilicate in the composition and said aluminosilicate has a product of the specific surface area in m2/g and the amorphous phase content in the range from 10 to 15. ### Claim 9 (depends on 1) A dry particulate composition according to claim 1, wherein the aluminosilicate in the amorphous state has a specific surface area in the range from 7 to 15 m2/g. ### Claim 10 (depends on 1) A method of preparing a geopolymer comprising the step of mixing a dry particulate composition according to claim 1 with water. ### Claim 11 (depends on 10) A method according to claim 10, wherein the amount of water is 50 wt.-% or less, based on the total weight of particulate composition and water. ### Claim 12 (depends on 10) A method according to claim 10, further comprising the step of adding aggregated materials after the addition of water and prior to geopolymerisation of the mixture. ### Claim 13 (depends on 10) A geopolymer obtained by a method according to any claim 10. ### Claim 14 (depends on 10) A method according to claim 10, further comprising the production of products or articles selected from mortars, concretes, cements, coatings, waste management articles for toxic or nuclear waste immobilization, geopolymeric high-tech/fiber reinforced composites, geopolymeric foams, e.g. for insulation, fire-proof coatings, foundry equipment, bricks, resins, binders, roads, or pavements. ### Claim 15 (canceled) ### Claim 16 (depends on 10) A method according to claim 10, wherein at least 50 wt.-% of the aluminosilicate is in an amorphous state. ### Claim 17 (depends on 10) A method according to claim 10, wherein the dry particulate composition comprises from 1 wt.-% to 25 wt.-% alkali metal hydroxide, from 15 wt.-% to 50 wt-% alkali metal silicate, and from 30 wt.-% to 80 wt.-% aluminosilicate, expressed as a proportion of the total weight of the dry particulate composition. ### Claim 18 (depends on 10) A method according to claim 10, wherein said aluminosilicate is selected from the group consisting of metakaolin, fly ash, halloysite, metahalloysite, slag, rock dust, fine sand, activated clay, kaolin, mica, mice, fine feldspar and mixtures thereof. ### Claim 19 (depends on 10) A method according to claim 10, wherein at least 50 wt. % of said aluminosilicate is in an amorphous state, based on the total weight of aluminosilicate in the composition and said aluminosilicate has a product of the specific surface area in m2/g and the amorphous phase content in the range from 5 to 15. ### Claim 20 (depends on 10) A method according to claim 10, wherein at least 70 wt. % of said aluminosilicate is in an amorphous state, based on the total weight of aluminosilicate in the composition and said aluminosilicate has a product of the specific surface area in m2/g and the amorphous phase content in the range from 10 to 15. ### Claim 21 (depends on 10) A method according to claim 10, wherein the aluminosilicate in the amorphous state has a specific surface area in the range from 7 to 15 m2/g.