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Low-shrinkage light gypsum material and preparation method thereof

A gypsum material and low-shrinkage technology, which is applied in the field of building insulation materials, can solve the problems of shrinkage resistance research and lack of application, and achieve excellent shrinkage deformation resistance, reduce thermal conductivity, and improve compatibility.

Inactive Publication Date: 2020-04-21
CHONGQING JIANDA BUILDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large differences between gypsum and cement in terms of composition, structure and performance, the research and application on the shrinkage resistance of gypsum-based materials are relatively scarce.

Method used

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  • Low-shrinkage light gypsum material and preparation method thereof
  • Low-shrinkage light gypsum material and preparation method thereof
  • Low-shrinkage light gypsum material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Taking the 100kg of building gypsum used to prepare the low-shrinkage lightweight heat-insulating gypsum material of the present invention as an example, the raw materials used and their quality are as follows:

[0026]

[0027]

[0028] The gelling material used in the above-mentioned present invention is desulfurized building gypsum powder, with a fineness of 200 μm sieve ≤ 10%; water adopts ordinary tap water; the bulk density of vitrified microbeads is 100-130kg / m 3 , the particle size is 1mm~3mm, the surface vitrification rate is ≥98%, the volume water absorption rate is ≤15%; polyvinyl alcohol fiber: the length is 3-10mm, the diameter is 15±3μm, and the density is 1.3g / cm 3 , the tensile strength is 1600MPa, the elastic modulus is 36GPa, and the elongation at break is 15%; the appearance of the silane coupling agent is a colorless or yellowish transparent liquid, the main component is methacryloxy functional group silane, and the purity is ≥98.5 %; the shrin...

Embodiment 2

[0036] Taking the 100kg of building gypsum used to prepare the low-shrinkage lightweight heat-insulating gypsum material of the present invention as an example, the raw materials used and their quality are as follows:

[0037]

[0038] The specification and preparation method of the above-mentioned raw materials are the same as in Example 1.

Embodiment 3

[0040] Taking the 100kg of building gypsum used to prepare the low-shrinkage lightweight heat-insulating gypsum material of the present invention as an example, the raw materials used and their quality are as follows:

[0041]

[0042]

[0043] The specification and preparation method of the above-mentioned raw materials are the same as in Example 1.

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Abstract

The invention relates to a low-shrinkage light gypsum material, which comprises the following raw materials by mass: 100 parts of building gypsum, 35 to 45 parts of water, 40 to 60 parts of vitrifiedmicro-beads, 0.2 to 0.5 part of polyvinyl alcohol fiber, 0.2 to 0.5 part of a silane coupling agent, 3 to 8 parts of a shrinkage reducing agent, 0.3 to 0.6 part of an adhesive, 0.2 to 0.5 part of a water retaining agent, 0.2 to 0.4 part of a water reducing agent and 0.2 to 0.4 part of a retarder. According to the invention, the light thermal insulation gypsum material is prepared through compoundoptimization of the components, and has low shrinkage performance, excellent shrinkage deformation damage resistance, good workability and good thermal insulation property.

Description

technical field [0001] The invention belongs to the field of building insulation materials, and relates to a low-shrinkage lightweight gypsum material and a preparation method thereof. Background technique [0002] The construction industry is a major industry for my country's economic development. Research shows that in the first half of 2019, the national construction industry completed a total output value of 10.2 trillion yuan, an increase of 7.2% over the same period last year. The national construction industry completed housing construction area of ​​10.750 billion square meters, a year-on-year increase of 2.71%. In the next few years, our country will still be committed to the problem of housing for the urbanized population and urban construction. The construction ratio of housing and urban large-scale basic public facilities will increase the demand for building materials and accelerate the research and production of Chinese building materials. Building materials a...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B111/40
CPCC04B28/144C04B2111/40C04B2201/20C04B14/24C04B16/0641C04B24/42C04B24/32C04B24/2623C04B24/383C04B24/24C04B24/06C04B24/14
Inventor 彭家惠刘先锋朱聪张建新瞿金东易伟
Owner CHONGQING JIANDA BUILDING MATERIAL
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