Granite stone powder phosphoric acid-based geopolymer and preparation method thereof

Patent metadata

Field	Value
Publication number	US-11932578-B1
Application number	US-202318504109-A
Country	US
Kind code	B1
Filing date	Nov 7, 2023
Priority date	Nov 8, 2022
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

A granite stone powder phosphoric acid-based geopolymer and a preparation method thereof are provided. The granite stone powder phosphoric acid-based geopolymer is prepared from following raw materials in parts by weight: 35-70 parts of granite stone powder, 15-50 parts of metakaolin, 8-50 parts of fly ash, 8-30 parts of acid activation solution and 8-30 parts of solvent.

First claim

What is claimed is:

1. A granite stone powder phosphoric acid-based geopolymer, wherein the granite stone powder phosphoric acid-based geopolymer is prepared from following raw materials in parts by weight: 35-70 parts of granite stone powder, 15-50 parts of metakaolin, 8-50 parts of fly ash, 8-30 parts of acid activation solution and 8-30 parts of solvent; wherein
a particle size D50 of the granite stone powder is 20-30 μm;
the fly ash is F-type fly ash, the main chemical components of the fly ash are: SiO 2 30-55%, Al 2 O 3 20-30%, Fe 2 O 3 3-6%, CaO 3-6% and SO 3 0.5-3% by mass percentage;
a mass ratio of the metakaolin to the fly ash is 1:(0.4-2);
the acid activation solution is a mixed solution of sulfuric acid and phosphoric acid; a concentration of the sulfuric acid is 16-19M; a concentration of the phosphoric acid is 12-18M;
a mass ratio of the sulfuric acid to the phosphoric acid is 1:(19-26); and
the solvent is water.

2. The granite stone powder phosphoric acid-based geopolymer according to claim 1 , wherein a mass ratio of a total amount of the granite stone powder, the metakaolin and the fly ash to the solvent is 1:(0.2-0.3).

3. The granite stone powder phosphoric acid-based geopolymer according to claim 1 , wherein a mass ratio of a total amount of the granite stone powder, the metakaolin and the fly ash to the acid activation solution is 1:(0.2-0.3).

4. The granite stone powder phosphoric acid-based geopolymer according to claim 1 , wherein the granite stone powder phosphoric acid-based geopolymer is prepared from the following raw materials in parts by weight: 35-60 parts of granite stone powder, 25-35 parts of metakaolin, 10-35 parts of fly ash, 22-25 parts of acid activation solution and 22-25 parts of solvent.

5. The granite stone powder phosphoric acid-based geopolymer according to claim 1 , wherein the main chemical components of the granite stone powder are: SiO 2 50-70%, Al 2 O 3 10-20%, Fe 2 O 3 0.5-3% and CaO 0-3% by mass percentage; and the main chemical components of the metakaolin are: SiO 2 35-60%, Al 2 O 3 30-50%, MgO 0.1-1%, CaO 0-2% and Fe 2 O 3 0-3% by mass percentage.

6. A method for preparing the granite stone powder phosphoric acid-based geopolymer according to claim 1 , comprising the following steps:
uniformly mixing the granite stone powder, the metakaolin and the fly ash to obtain a mixture; and
uniformly mixing the mixture, the acid activation solution and the solvent, and molding and curing to obtain a cured granite stone powder phosphoric acid-based geopolymer.

7. The method for preparing the granite stone powder phosphoric acid-based geopolymer according to claim 6 , wherein a curing temperature is 60-80° C., and curing time is 18-36 h.

Assignees

• Univ Wuhan Tech

Inventors

• Ren liuyi
• Zhang Lu
• Bao Shenxu
• Zhang Yimin
• Qiu Zhiming
• Zhou Yuxiao

Classifications

• C04B28/342

  the phosphate binder being present in the starting composition as a mixture of free acid and one or more reactive oxides · CPC title

• C04B28/006 Primary

  containing mineral polymers, e.g. geopolymers of the Davidovits type · CPC title

• C04B22/165 Primary

  Acids · CPC title

• C04B14/048

  Granite · CPC title

• C04B14/106

  Kaolin · CPC title