Flyash geopolymer based porous material and preparation process thereof

A geopolymer and porous material technology, applied in the field of fly ash geopolymer porous material and its manufacturing process, can solve the problems of high cost of porous materials, low compressive and flexural strength, flammability of thermal insulation materials, etc. Strong freeze-thaw resistance, easy control of foaming conditions, and easy operation
CN105800972AInactive Publication Date: 2016-07-27QINGHAI UNIVERSITY +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QINGHAI UNIVERSITY
Publication Date
2016-07-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a flyash geopolymer based porous material and a preparation process thereof. The porous material comprises the following components in parts by weight: 60-100 parts of flyash, 40-70 parts of alkali activator, 0-40 parts of admixtures, 0-5 parts of glass fibers, 2-8 parts of physical foaming agents and 0-0.8 part of chemical activators, wherein the alkali activator is alkaline mixed liquor containing various ions and comprises industrial water glass, sodium hydroxide, water, polyethylene glycol and sodium phosphate; the admixtures refer to levigated metakaolin, silicon micropowder and calcined coal gangue; the physical foaming agents include expired shampoo, an anionic surfactant sodium dodecyl sulfate (SDS), fatty alcohol polyoxyethylene ether sodium sulfate (AES) and disodium fatty alcohol polyoxyethylene ether monosulfosuccinate (AESS); the chemical foaming agents include aluminium powder, hydrogen peroxide, and the like. The porous material has adjustable volume density, fine and uniform pore diameter, low heat conductivity, high strength, the same life as buildings and good fireproof performance.
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Description

technical field

[0001] The invention relates to the technical field of material engineering, in particular to a fly ash geopolymer porous material and a manufacturing process thereof. Background technique

[0002] Geopolymer is made of active high-calcium-free or low-calcium aluminum siliceous materials such as kaolin, slag, fly ash, etc. Three-dimensional network gels with state characteristics are collectively referred to as geopolymers. Geopolymer-based porous materials are porous materials prepared by foaming or pore-forming agent methods based on geopolymers. They have large specific surface area, large adsorption capacity, good chemical stability, high hardness, and excellent heat resistance. Low thermal conductivity and many other excellent characteristics. There are 40 billion square meters of existing residential buildings in my country, and 2.5 billion square meters of new buildings are added every year. A building of 1 square meter requires about 1.52 square met...

Claims

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