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Expanded polystyrene high-strength lightweight aggregate with core-shell structure and preparation method thereof

A foamed polystyrene, core-shell structure technology, applied in ceramic products, household appliances, other household appliances and other directions, can solve the problems of easy floating and delamination, low mechanical properties, poor bonding strength, etc., and achieves the preparation method. Simple, improve mechanical strength, improve the effect of bonding performance

Active Publication Date: 2022-05-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention aims to propose a foamed polystyrene high-strength lightweight aggregate with a core-shell structure to solve the problem of poor bonding strength between the existing foamed polystyrene lightweight aggregate and cement interface, and in the cement slurry. It is easy to float and delaminate, and the problem of low mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] An expanded polystyrene high-strength lightweight aggregate with a core-shell structure. In terms of weight percentage, the raw materials for the expanded polystyrene high-strength lightweight aggregate with a core-shell structure include the following components:

[0033] Expanded polystyrene lightweight aggregate: 15.5%, triethanolamine: 4.6%, ethylene-vinyl acetate: 4%, polyvinyl alcohol: 5.4%, binder: 70%, polycarboxylate water reducer: 0.18% , Hydroxypropyl methylcellulose ether: 0.17%. Among them, the cement is composed of cement, fly ash and silica fume, the cement in the cement is 42.5 grade sulphoaluminate cement, and this cement accounts for 45% in the cement; the fly ash in the cement is grade I Fly ash, A1 in the fly ash 2 o 3 +SiO2 2 +Fe 2 o 3 The total content of the fly ash is 88.92%, and the fly ash accounts for 45% in the cement; the particle size of the silica fume in the cement is 0.2 μm, and the silica fume accounts for 10% in the cement.

[00...

Embodiment 2

[0041] An expanded polystyrene high-strength lightweight aggregate with a core-shell structure. In terms of weight percentage, the raw materials for the expanded polystyrene high-strength lightweight aggregate with a core-shell structure include the following components:

[0042] Expanded polystyrene lightweight aggregate: 12%, triethanolamine: 5%, ethylene-vinyl acetate: 6.4%, polyvinyl alcohol: 3.7%, cementing material: 73%, naphthalene-based water reducer: 0.22%, hydroxyl Ethyl cellulose ether: 0.13%. Among them, the cement is composed of cement, fly ash and silica fume, the cement in the cement is 42.5 grade sulphoaluminate cement, and this cement accounts for 55% in the cement; the fly ash in the cement is grade I Fly ash, A1 in the fly ash 2 o 3 +SiO2 2 +Fe 2 o 3 The total content of the coal is 88.92%, and the fly ash accounts for 40% in the cement; the particle size of the silica fume in the cement is 0.1 μm, and the silica fume accounts for 5% in the cement.

[...

Embodiment 3

[0050] An expanded polystyrene high-strength lightweight aggregate with a core-shell structure. In terms of weight percentage, the raw materials for the expanded polystyrene high-strength lightweight aggregate with a core-shell structure include the following components:

[0051] Expanded polystyrene lightweight aggregate: 9.5%, triethanolamine: 5.1%, ethylene-vinyl acetate: 6.2%, polyvinyl alcohol: 5.4%, cementitious material: 77%, polyamide-based water reducer: 0.2%, Carboxymethyl cellulose ether: 0.2%. Among them, the cement is composed of cement, fly ash and silica fume, the cement in the cement is 42.5 grade sulphoaluminate cement, and the cement accounts for 50% in the cement; the fly ash in the cement is grade I Fly ash, A1 in the fly ash 2 o 3 +SiO2 2 +Fe 2 o 3 The total content of the coal is 88.92%, and the fly ash accounts for 35% in the cement; the particle size of the silica fume in the cement is 0.3 μm, and the silica fume accounts for 15% in the cement.

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PUM

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Abstract

The invention provides a foamed polystyrene high-strength lightweight aggregate with a core-shell structure and a preparation method thereof. The raw materials of the foamed polystyrene high-strength lightweight aggregate with a core-shell structure include the following components : Expanded polystyrene lightweight aggregate: 9.5%‑15.5%, triethanolamine: 4.6%‑6.5%, ethylene‑vinyl acetate: 3.7%‑6.4%, polyvinyl alcohol: 3.7%‑5.4%, binder: 68%‑77%. The foamed polystyrene high-strength lightweight aggregate with a core-shell structure of the present invention uses an emulsion composed of triethanolamine, ethylene-vinyl acetate and polyvinyl alcohol as a surface modifier, and sprays it on the foamed polystyrene lightweight aggregate. The surface of the expanded polystyrene lightweight aggregate is modified to change the surface from hydrophobicity to hydrophilicity, which greatly improves its bonding performance with inorganic gelling materials, thereby avoiding its stirring The phenomenon of floating and delamination occurs during the process, so that it can be evenly distributed in the cement slurry, thereby greatly improving its workability and mechanical properties.

Description

technical field [0001] The invention relates to the technical field of wall materials, in particular to a foamed polystyrene high-strength lightweight aggregate with a core-shell structure and a preparation method thereof. Background technique [0002] In terms of building energy conservation, according to statistical analysis, about 36% of my country's annual energy consumption is used for indoor heating or cooling. With the improvement of the requirements for thermal insulation performance of buildings, various thermal insulation materials are used. The current thermal insulation materials are mainly polystyrene foam materials, which account for 99% of the existing thermal insulation materials, such as foam Polystyrene lightweight aggregate cement lightweight interior wall partitions. However, the foamed polystyrene lightweight aggregate produced at present is hydrophobic, and the inorganic gelling material is not wet to it. In the process of freshly mixing cement, due t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/08C04B28/06
CPCC04B28/06C04B2111/40C04B2201/50C04B16/08C04B24/045C04B24/122C04B24/2623C04B2103/302C04B2103/465C04B38/08
Inventor 马保国胡鹏辉苏英金子豪孙仲达吴潇
Owner WUHAN UNIV OF TECH