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A kind of expanded phosphate-based geopolymer and preparation method thereof

A geopolymer, intumescent technology, used in cement production and other directions, can solve the problem that geopolymer cannot be widely used, and achieve the effect of remarkable rapid setting.

Active Publication Date: 2022-05-06
WUHAN UNIV
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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 phosphate-based geopolymer with expansibility and quick-setting properties, aiming to solve the problem that geopolymers cannot be widely used in large-scale water conservancy projects and traffic road emergency projects. Provide technical support for the application of materials in such projects

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  • A kind of expanded phosphate-based geopolymer and preparation method thereof
  • A kind of expanded phosphate-based geopolymer and preparation method thereof
  • A kind of expanded phosphate-based geopolymer and preparation method thereof

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Embodiment 1

[0047] (1) The geopolymer precursor (Al 2 o 3 -nSiO 2 ), the raw materials used include: aluminum nitrate nonahydrate (ANN), tetraethylorthosilicate (TEOS), absolute ethanol (EtOH) and deionized water (DIW); the specific steps are: first, use deionized water Mix and stir with aluminum nitrate nonahydrate to prepare a transparent aluminum solution, the molar ratio of deionized water and aluminum nitrate nonahydrate is 30:1; then, prepare a transparent silicon-aluminum solution with absolute ethanol and tetraethyl orthosilicate for use, Wherein, the molar ratio of absolute ethanol and tetraethyl orthosilicate is 5:1; Aluminum solution and silicon solution are compounded according to Si / Al=1.5, namely aluminum nitrate nonahydrate takes 750.26g, tetraethyl orthosilicate takes 208.33g g, take 200.35g of absolute ethanol and 1080g of deionized water, and the specific quality can be adjusted in equal proportions according to the preparation requirements. Subsequently, the mixed al...

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Abstract

The invention discloses an expanded phosphoric acid-based geopolymer and a preparation method thereof, which belong to the technical field of inorganic non-metallic materials. The preparation method comprises the following steps: (1) the silicon-alumina ratio of 0.25-3 is prepared by a sol-gel method (2) Acetone is used as an additive, and a phosphoric acid solution is used to stimulate the generation of an expanded phosphate-based geopolymer. The expanded phosphate-based geopolymer prepared by the invention has remarkable expansibility and quick-setting property, and can shorten the conventional setting time of 12 hours to 5 minutes.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic materials, in particular to an expanded phosphate-based geopolymer and a preparation method thereof. Background technique [0002] As a widely used cementitious material, Portland cement emits a large amount of carbon dioxide in the process of production and use, which leads to continuous aggravation of global warming. Phosphate-based geopolymers are prepared from natural minerals or solid wastes, and contain amorphous and quasi-crystalline three-dimensional network gels of tetrahedrons such as silica, aluminum-oxygen tetrahedron, and phosphorus-oxygen tetrahedron. According to relevant research, if geopolymers are used instead of traditional Portland cement, carbon dioxide emissions will be reduced by 80 times. From the perspective of traditional material classification, phosphate-based geopolymers are inorganic macromolecular materials whose main chain is composed of non-carbon a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B12/00
CPCC04B12/005Y02P40/10
Inventor 周伟唐嘉博姬翔
Owner WUHAN UNIV