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Fly ash geopolymer foam concrete and its preparation method

A geopolymer and foam concrete technology, applied in the field of building materials, can solve problems such as efflorescence, high cost, structural damage, etc., and achieve the effect of solving low strength

Active Publication Date: 2022-02-11
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alkaline activators used in this method are caustic alkali and liquid water glass, which are expensive, and strong alkali will cause serious pan-alkaline phenomenon in the later stage, which may cause structural damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take the raw material by the following parts by weight:

[0028] 60 parts of fly ash, 30 parts of alkali slag, 0.5 parts of grinding aid, 4 parts of silica fume, 1 part of surfactant, 0.35 parts of foaming agent, 2 parts of sodium hydroxide and 3 parts of water glass;

[0029] Above-mentioned raw material is carried out according to the following steps:

[0030] 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 median particle size of slurry A is 1-3 μm, and water Parts by weight are 35 parts;

[0031] 2) Put silica fume, surfactant and foaming agent into the wet ball mill, then add water into the wet ball mill and wet grind to obtain slurry B, the median particle size of slurry B is 150-800nm ​​in parts by weight of water for 2 copies;

[0032] 3) mixing the slurry A obtained in step 1) and the slurry B obtained in step 2) to obtain a mixed slurry C;

[0033] ...

Embodiment 2

[0037] Take the raw material by the following parts by weight:

[0038] 65 parts of fly ash, 35 parts of alkali slag, 0.6 parts of grinding aid, 5 parts of silica fume, 2 parts of surfactant, 0.43 parts of foaming agent, 3 parts of sodium hydroxide and 3 parts of water glass;

[0039] Above-mentioned raw material is carried out according to the following steps:

[0040] 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 median particle size of slurry A is 1-3 μm, and water Parts by weight are 45 parts;

[0041] 2) Put silica fume, surfactant and foaming agent into the wet ball mill, then add water into the wet ball mill and wet grind to obtain slurry B, the median particle size of slurry B is 150-800nm ​​in parts by weight of water for 4 copies;

[0042] 3) mixing the slurry A obtained in step 1) and the slurry B obtained in step 2) to obtain a mixed slurry C;

[0043]...

Embodiment 3

[0047] Take the raw material by the following parts by weight:

[0048] 75 parts of fly ash, 45 parts of alkali slag, 0.65 parts of grinding aid, 7 parts of silica fume, 4 parts of surfactant, 0.6 parts of foaming agent, 4 parts of sodium hydroxide and 4 parts of water glass;

[0049] Above-mentioned raw material is carried out according to the following steps:

[0050] 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 median particle size of slurry A is 1-3 μm, and water Parts by weight are 55 parts;

[0051]2) Put silica fume, surfactant and foaming agent into the wet ball mill, then add water into the wet ball mill and wet grind to obtain slurry B, the median particle size of slurry B is 150-800nm ​​in parts by weight of water for 5 copies;

[0052] 3) mixing the slurry A obtained in step 1) and the slurry B obtained in step 2) to obtain a mixed slurry C;

[0053] ...

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Abstract

The invention discloses a method for preparing fly ash geopolymer foam concrete. The fly ash, alkali slag and water are mixed and sent to a wet ball mill, and then a grinding aid is added to the wet ball mill for grinding to obtain a slurry A‑Send silica fume, surfactant and foaming agent into the wet ball mill, and then add water into the wet ball mill for wet grinding to obtain slurry B‑Mix slurry A and slurry B to obtain mixed slurry C‑Add hydrogen Sodium oxide and water glass are added to the slurry C to obtain a solid-liquid mixed slurry of fly ash geopolymer foam concrete; the problem of low strength and easy to be affected by moisture in traditional foam concrete is solved; the prepared concrete product is far more expensive in terms of capital cost It is lower than traditional foam concrete, and its strength and high temperature resistance are superior to geopolymer concrete prepared by traditional technology.

Description

technical field [0001] The invention belongs to the technical field of building materials, and specifically refers to a fly ash geopolymer foam concrete and a preparation method thereof. Background technique [0002] Foamed concrete is to fully foam the foaming agent mechanically through the foaming system of the foaming machine, and evenly mix the foam with the cement slurry, and then go through the pumping system of the foaming machine for cast-in-place construction or mold molding. A new type of lightweight thermal insulation material containing a large number of closed pores formed by curing. As a lightweight porous material, compared with ordinary concrete, foam concrete has excellent properties such as heat preservation, waste utilization, shock absorption, and wave absorption. Foamed concrete is widely used in thermal insulation materials, wall materials, foundation treatment, filling in mining areas, etc., and has attracted increasing attention. [0003] Geopolymer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B38/10
CPCC04B28/006C04B2201/20C04B2201/50C04B2201/32C04B18/08C04B18/0481C04B2103/302C04B18/146C04B24/16C04B24/14C04B22/062C04B12/04C04B38/10Y02P40/10
Inventor 贺行洋曾令豪郑星赟杨进苏英王迎斌杨明鉴曾景义张芸宁胡华超梁文
Owner HUBEI UNIV OF TECH
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