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A kind of high-strength thermal insulation concrete and its preparation method

A heat-preserving concrete and high-strength technology, which is applied to ceramic products, other household utensils, household utensils, etc., can solve the problems of micropores that cannot be well sealed, low closed pore rate, and low strength, so as to improve the sealing effect of micropores, Improved impermeability and high water absorption

Active Publication Date: 2021-04-16
GUIZHOU UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantages are: low density, light weight, heat preservation, sound insulation, earthquake resistance, etc., but there are still some defects, such as low strength, cracking, water absorption, etc., and its performance needs to be further improved. The existing technology usually adds resin, etc. Organic bonding materials are used to enhance the direct bonding strength of concrete inorganic aggregates, and the aggregates are treated with resins to increase the closed porosity and improve waterproof performance. However, conventional methods are used to directly mix resins with cement, fillers, etc., usually resins only Can cover the surface of the filler, the micropores in the filler cannot be well closed, and the closed cell rate is low

Method used

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  • A kind of high-strength thermal insulation concrete and its preparation method
  • A kind of high-strength thermal insulation concrete and its preparation method
  • A kind of high-strength thermal insulation concrete and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Preparation of Small Molecule Polyurethane Prepolymer

[0030] Dissolve 10 parts of polyester polyol and 12 parts of MDI in 100 parts of DMF:EAC mixed solvent with a mass ratio of 1:2, react at 60°C for 2.5 hours and concentrate to 50% concentration, the molecular weight of polyester polyol is 300;

[0031]The preparation of high-strength thermal insulation concrete is prepared by a high-efficiency mixer. The high-efficiency mixer includes a fixed bracket 3 and a water injection and dust suppression device 15. The lower end of the fixed bracket 3 is provided with a cylindrical load-bearing chassis 2. The reinforced steel plate 14 is fixedly connected with the shell 1, the right side of the bottom of the shell 1 is provided with a discharge partition 4, the entrance on the left side of the shell 1 is a converging frustum-shaped entrance, the right side of the shell 1 is fixedly connected with the stirring drive motor 6, and the stirring drive motor 6 The rotating shaft i...

Embodiment 2

[0038] The components of this example are 100 parts of cement, 400 parts of fly ash, 150 parts of ceramsite, 50 parts of water-soluble acrylic resin, 25 parts of slag, 40 parts of molecular sieve, 3 parts of water reducing agent, and 80 parts of water. 8 parts of agent, 20 parts of small molecule polyurethane prepolymers, the production technology of present embodiment and others are all identical with embodiment 1.

Embodiment 3

[0040] The components of this example are 100 parts of cement, 200 parts of fly ash, 300 parts of ceramsite, 30 parts of water-soluble acrylic resin, 40 parts of slag, 25 parts of molecular sieve, 2 parts of water reducing agent, and 70 parts of water. 9 parts of agent, 20 parts of small molecule polyurethane prepolymers, the production technology of present embodiment and others are all identical with embodiment 1.

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Abstract

The invention discloses a high-strength thermal insulation concrete, which comprises cement, fly ash, porous aggregate, water-soluble acrylic resin, slag, molecular sieve, water reducing agent, water, foaming agent and small molecule polyurethane prepolymer. The porous filler has a large number of micropores, fully in contact with the small molecule polyurethane prepolymer, strong adhesion, and good closed cell effect. After curing, the water-based hydroxyacrylic resin can improve the impermeability of the foam concrete, improve the waterproof performance, and have good weather resistance. It protects the polyurethane bonding material. The two bonding materials cooperate with each other to fully bond the filler from the gap to the surface, which can effectively prevent cracking and improve the strength of foam concrete. The production process of the present invention uses a high-efficiency mixer, and the mixing effect is good , can make the small molecule polyurethane prepolymer fully contact with the porous filler, improve the coating effect of the bonding material on the porous filler, and can effectively prevent the pollution of the atmosphere by the filler powder and free isocyanate.

Description

Technical field: [0001] The invention relates to a preparation method of thermal insulation concrete, in particular to a high-strength thermal insulation concrete and a preparation method thereof. Background technique: [0002] Foamed concrete, also known as foamed cement, lightweight concrete, etc., is a new type of building energy-saving material that is waste-friendly, environmentally friendly, energy-saving, inexpensive and non-combustible. Lightweight concrete (foam concrete) is formed by introducing air or nitrogen, carbon dioxide, oxygen and other gases into the concrete slurry according to the application needs through chemical or physical means, and after reasonable maintenance and molding, it is formed to contain a large number of small closed pores, and Concrete products of considerable strength. The production of lightweight concrete (foamed concrete) is usually prepared by mechanical means to prepare foaming agent aqueous solution into foam. The specific opera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02
CPCC04B28/02C04B2201/32C04B2201/50C04B18/08C04B18/027C04B24/26C04B18/141C04B14/047C04B2103/302C04B38/02C04B24/282
Inventor 陈昌禄张效忠张晓虎韩六平李海燕周磊
Owner GUIZHOU UNIV OF ENG SCI