Environment-friendly geopolymer-based foaming material

A technology of foam materials and geopolymers, applied in the field of geopolymer-based foam materials and their preparation, can solve the problems of bulk density, high thermal conductivity, poor fire resistance, etc., achieve simple process, avoid high temperature sintering, reduce pollution and air pollution pollution effect

Inactive Publication Date: 2013-02-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic materials have the characteristics of light weight, heat preservation, heat insulation, and waterproof, but their fire resistance is poor;

Method used

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  • Environment-friendly geopolymer-based foaming material
  • Environment-friendly geopolymer-based foaming material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Prepare a sodium hydroxide solution with a mole fraction of 10%, weigh the fly ash and silicon dioxide according to the Si:Al molar ratio of the silicon-aluminum element in the fly ash and silicon dioxide is 1.8:1, and stir the silicon dioxide Slowly add sodium hydroxide solution under the condition of stirring to obtain sodium silicate solution, then add fly ash into the sodium silicate solution under stirring condition to make a slurry with a solid phase content of 62%, and ball mill for 10 minutes . After ball milling, add 0.04wt% aluminum powder for foaming, and add 0.01v% foam stabilizer at the same time, inject the fully foamed slurry into a cylindrical mold with d×h of 50mm×125mm, and place it at room temperature for 6 hours to fully After foaming, it is cured by heating at 70°C, and after demoulding, it is kept in a cool place at room temperature for 7 days. The shape of the obtained ceramic foam is a regular cylinder, its density is measured by the mass / volume...

Embodiment 2

[0022] Prepare a potassium hydroxide solution with a mole fraction of 8%, weigh the fly ash and silicon dioxide according to the Si:Al molar ratio of the silicon-aluminum element in the fly ash and silicon dioxide as 2.0:1, and stir the silicon dioxide Slowly add sodium hydroxide solution under the same conditions and stir evenly to obtain sodium silicate solution, then add fly ash into the sodium silicate solution under stirring conditions to prepare a slurry with a solid phase content of 62%, and ball mill for 10 minutes. After ball milling, add 0.06wt% aluminum powder for foaming, and add 0.01v% foam stabilizer at the same time, inject the fully foamed slurry into a cylindrical mold with d×h of 50mm×125mm, and place it at room temperature for 6 hours to fully After foaming, it is cured by heating at 70°C, and after demoulding, it is kept in a cool place at room temperature for 7 days. The shape of the obtained ceramic foam is a regular cylinder, its density is measured by t...

Embodiment 3

[0024] Prepare a sodium hydroxide solution with a mole fraction of 12%, weigh the fly ash and silicon dioxide according to the Si:Al molar ratio of the silicon-aluminum element in the fly ash and silicon dioxide as 2.0:1, and stir the silicon dioxide Slowly add sodium hydroxide solution into the sodium silicate solution and stir evenly to obtain a sodium silicate solution, then add fly ash into the sodium silicate solution under stirring to form a slurry with a solid phase content of 65%, and ball mill for 10 minutes. After ball milling, add 0.04wt% aluminum powder for foaming, and add 0.01v% foam stabilizer at the same time, inject the fully foamed slurry into a cylindrical mold with d×h of 50mm×125mm, and place it at room temperature for 6 hours to fully After foaming, it is cured by heating at 70°C, and after demoulding, it is kept in the shade at room temperature for 7 days. The shape of the obtained foamed ceramics is a regular cylinder, its density is measured by the mas...

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Abstract

The invention discloses an environment-friendly geopolymer-based foaming material. According to the invention, a low-density high-strength geopolymer-based foaming material is prepared by adding sodium hydroxide or potassium hydroxide in coal ash of which the main components are alumina and silicon oxide, carrying out alkaline activation on the coal ash so that geopolymerization is generated and single substance Al has chemical reaction under the alkaline condition to generate gas to foam in slurry. The high-value utilization of the coal ash is realized under the condition that solid waste pollution and air pollution are lowered, thereby reaching the purposes of energy conservation, emission reduction, environment protection. The geopolymer-based foaming material meets the requirements of first-grade heat preservation boards, and is simple in process and free from high-temperature sintering.

Description

technical field [0001] The invention belongs to a ceramic composition characterized by components, in particular to a geopolymer-based foam material and a preparation method thereof, which belong to the technical field of porous ceramics. Background technique [0002] Geopolymer, referred to as "geopolymer", is a new type of hydraulic gelling material with a zeolite-like three-dimensional network structure connected by silicon-oxygen tetrahedrons and aluminum-oxygen tetrahedrons through bridge oxygen bonds. Geopolymers are usually made of silica-alumina raw materials with pozzolanic activity, such as metakaolin, kaolin, fly ash, volcanic ash, clay, etc., which are obtained through appropriate processing at relatively low temperatures, and have a high-temperature-free sintering process features. And because of its unique structure, it not only has the characteristics of organic polymers, ceramics, and cement, but also exhibits some unique properties, such as high strength, r...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/26C04B24/08C04B103/48
CPCY02P40/10
Inventor 王敏杜海燕郝瑞华张晓艳巩晓晓
Owner TIANJIN UNIV
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