Geopolymer and preparation method thereof

A geopolymer and slurry technology, applied in cement production, etc., can solve the problems of large specificity, low economy, and high price of solid sodium silicate, achieve high performance strength, reduce costs, and solve large-scale frosting problem effect

Active Publication Date: 2019-12-20
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese invention patent application (publication number CN103449744A, publication date 2013-12-18) discloses a fly ash-based geopolymer and a preparation method thereof, using fly ash and silica fume, solid sodium silicate, and industrial sodium hydroxide as The ratio of 1:0.3:0.12:0.06, mixing and stirring for 28 days to make geopolymers, the silica fume and solid sodium silicate used in this method are expensive, the specific gravity is large, and the economy is not strong

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The raw materials are weighed according to the following parts by weight: 65 parts of fly ash, 30 parts of alkali slag, 0.5 part of grinding aid, 5 parts of zeolite powder, 2 parts of sodium hydroxide and 3 parts of water glass;

[0028] Above-mentioned raw material is carried out according to the following steps:

[0029] 1) Mix fly ash, alkali slag and water and send them into a wet ball mill, then add grinding aids to the wet ball mill for grinding to obtain slurry A, the parts by weight of water are 26 parts, and the median value of slurry A is The particle size is 1000nm;

[0030] 2) sending zeolite powder and water into a wet ball mill for wet grinding to obtain slurry B, the parts by weight of water are 4 parts, and the median particle size of slurry B is 10 μm;

[0031] 3) mixing the slurry A obtained in step 1) and the slurry B obtained in step 2) to obtain a mixed slurry C;

[0032] 4) adding sodium hydroxide and water glass to the slurry C to obtain a solid...

Embodiment 2

[0036] The raw materials are weighed according to the following parts by weight: 75 parts of fly ash, 35 parts of alkali slag, 0.6 part of grinding aid, 7 parts of zeolite powder, 2 parts of sodium hydroxide and 3 parts of water glass;

[0037] Above-mentioned raw material is carried out according to the following steps:

[0038] 1) Mix fly ash, alkali slag and water and send them into the wet ball mill, then add the grinding aid into the wet ball mill for grinding to obtain slurry A, the parts by weight of water are 30 parts, and the median value of slurry A is The particle size is 680nm;

[0039] 2) sending zeolite powder and water into a wet ball mill for wet grinding to obtain slurry B, the parts by weight of water are 6 parts, and the median particle size of slurry B is 9 μm;

[0040] 3) mixing the slurry A obtained in step 1) and the slurry B obtained in step 2) to obtain a mixed slurry C;

[0041] 4) adding sodium hydroxide and water glass to the slurry C to obtain a ...

Embodiment 3

[0045] The raw materials are weighed in the following parts by weight: 80 parts of fly ash, 40 parts of alkali slag, 0.7 part of grinding aid, 7 parts of zeolite powder, 4 parts of sodium hydroxide and 3 parts of water glass;

[0046] Above-mentioned raw material is carried out according to the following steps:

[0047] 1) Mix fly ash, alkali slag and water and send them into a wet ball mill, then add grinding aids into the wet ball mill for grinding to obtain slurry A, the parts by weight of water are 40 parts, and the median value of slurry A is The particle size is 430nm;

[0048] 2) sending zeolite powder and water into a wet ball mill for wet grinding to obtain slurry B, the parts by weight of water are 8 parts, and the median particle size of slurry B is 7 μm;

[0049] 3) mixing the slurry A obtained in step 1) and the slurry B obtained in step 2) to obtain a mixed slurry C;

[0050] 4) adding sodium hydroxide and water glass to the slurry C to obtain a solid-liquid mi...

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Abstract

The invention discloses a preparation method of a geopolymer. The method comprises the following steps: mixing fly ash, alkaline residue and water, and feeding an obtained mixture into a wet ball mill; adding a grinding aid into the wet ball mill for grinding to obtain slurry A; feeding zeolite powder and water into the wet ball mill for wet grinding to obtain slurry B; mixing the slurry A and theslurry B to obtain mixed slurry C; and adding sodium hydroxide and water glass into the slurry C to obtain the fly ash geopolymer solid-liquid mixed slurry. The hazard problems caused by chloride ions in alkaline residue in conventional technology is solved, the use amount of strong base is reduced, the frosting phenomenon is reduced, the performance of the water reducing agent is not influenced,and the working performance is adjustable; the prepared concrete finished product is superior to the geopolymer prepared by the traditional process in the aspects of strength, durability and the like.

Description

technical field [0001] The invention belongs to the technical field of building materials, and specifically refers to a geopolymer and a preparation method. Background technique [0002] Geopolymers were proposed by the Frenchman Davidovits. The research on this material is to solve the problems of poor heat resistance of organic polymer materials. Geopolymers are also called inorganic polymers, mineral polymers, etc. Geopolymers can be prepared from natural minerals or industrial solid wastes under the action of chemical activators. They are gelling materials with a three-dimensional network structure. Geopolymers have excellent mechanical properties, high temperature resistance and corrosion resistance. They can replace Portland cement in the field of building materials, solid seal treatment of heavy metal waste and nuclear waste, porous adsorption materials, and high-performance composite materials. It also performed well in other fields. [0003] The raw material initi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26C04B7/36C04B12/00C04B28/00C04B111/20
CPCC04B7/243C04B7/36C04B12/005C04B28/006C04B2111/2023C04B14/02C04B14/06C04B2103/302Y02P40/10
Inventor 贺行洋曾令豪郑星赟杨进苏英王迎斌江波梁文胡华超秦景燕刘富勤
Owner HUBEI UNIV OF TECH
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