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Solid-waste-containing light-weight, heat-preservation and high-strength geopolymer and preparation method thereof

A geopolymer, high-strength technology, applied in the field of building materials, can solve the problems of poor mechanical properties and thermal insulation effect of building insulation materials, and achieve the effect of reducing the density of concrete and improving the utilization rate

Pending Publication Date: 2022-06-28
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a light-weight-insulation-high-strength geopolymer containing solid waste and a preparation method thereof to solve the problems of poor mechanical properties and thermal insulation effects of the above-mentioned building insulation materials

Method used

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  • Solid-waste-containing light-weight, heat-preservation and high-strength geopolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Present embodiment 1 light-weight thermal insulation geopolymer, by weight parts, its each component is as follows:

[0033] 9.6 parts of 106-113μm fly ash hollow microspheres (density 418.8 kg / m 3 , thermal conductivity is 0.08-0.1W / (m K)), 0.48 parts of silica fume of 0.3-18 μm, 1.86 parts of water, 7.78 parts of water glass, 1.0 parts of NaOH, purity of 98%, 0.1-0.8 mm Silica airgel 0.27 parts (density 40-150 kg / m 3 , thermal conductivity 0.013 W / (m K)).

[0034] The material preparation process is:

[0035] (1) Mix NaOH flaky solid with water, stir with a glass rod for 1-2min until NaOH is completely dissolved, and prepare an alkali solution with a concentration of 12mol / L;

[0036] (2) Mix the alkali solution with the weighed water glass solution, stir it with a glass rod for 2-3 minutes to disperse it evenly, obtain the alkali activator solution, and let it stand for 24 hours;

[0037](3) Inject silica airgel into the cavity of fly ash hollow microbeads by vac...

Embodiment 2

[0044] Present embodiment 2 lightweight thermal insulation geopolymer, by weight parts, its each component is as follows:

[0045] 9.6 parts of 106-113μm fly ash hollow microspheres (density 418.8 kg / m 3 , thermal conductivity is 0.08-0.1W / (m K)), 0.48 parts of silica fume of 0.3-18 μm, 2.18 parts of water, 7.23 parts of water glass, 0.93 parts of NaOH, purity of 98%, 0.1-0.8 mm Silica airgel 0.32 parts (density 40-150 kg / m 3 , thermal conductivity 0.013 W / (m K)).

[0046] Material preparation process:

[0047] Except step (1) mixing NaOH flaky solid with water, stirring with a glass rod for 1-2 min until NaOH is completely dissolved, and preparing an alkali solution with a concentration of 10 mol / L, the rest of the steps are the same as in Example 1.

Embodiment 3

[0049] Present embodiment 3 light-weight thermal insulation geopolymers, by weight parts, its each component is as follows:

[0050] 9.6 parts of 106-113μm fly ash hollow microspheres (density 418.8 kg / m 3 , thermal conductivity is 0.08-0.1W / (m K)), 0.48 parts of silica fume of 0.3-18 μm, 1.86 parts of water, 7.78 parts of water glass, 1.0 parts of NaOH, purity of 98%, 0.1-0.8 mm Silica airgel 0.19 parts (density 40-150 kg / m 3 , thermal conductivity 0.013 W / (m K)).

[0051] The material preparation process is the same as in Example 1.

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Abstract

The invention discloses a solid waste-containing light-weight, heat-preservation and high-strength geopolymer and a preparation method thereof. The geopolymer is prepared from the following components in parts by weight: 0.01-0.5 part of silicon dioxide aerogel, 0.1-0.6 part of silica fume, 5-15 parts of fly ash hollow microspheres, 0.5-1.5 parts of sodium hydroxide, 3-9 parts of water glass and 1-4 parts of water. Wherein the silicon dioxide aerogel is injected into cavities of the fly ash hollow microspheres. According to the light-weight, heat-preservation and high-strength geopolymer containing the solid waste and the preparation method of the geopolymer, the solid waste of the fly ash hollow microspheres is adopted as a raw material, the utilization rate of the solid waste is effectively increased, low carbon and environment friendliness are achieved, the silicon dioxide aerogel is injected into cavities of the hollow microspheres through a vacuum method, and through the coupling effect of the silicon dioxide aerogel and the hollow microspheres, the light-weight, heat-preservation and high-strength geopolymer containing the solid waste is obtained. And the concrete density can be effectively reduced by doping into concrete, and light thermal insulation concrete can be prepared.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a light-weight-insulation-high-strength geopolymer containing solid waste and a preparation method thereof. Background technique [0002] With the development of society, ultra-low energy consumption buildings have attracted much attention. Building energy conservation is an important part of energy conservation and emission reduction. The most effective way to improve building energy efficiency is to use thermal insulation materials, which have lower thermal conductivity than ordinary weight concrete. , thereby reducing building energy consumption and providing better fire performance. The use of solid waste as cementitious material on the one hand realizes the reuse of waste, on the other hand greatly reduces the emission of carbon dioxide, which plays an important role in environmental protection. [0003] Fly ash cenospheres have a hard shell and high isostatic st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B12/00
CPCC04B12/005
Inventor 解盼盼潘竹丁效永
Owner HEBEI UNIV OF TECH
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