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Method for improving mechanical properties of gypsum-based material

A material mechanics, gypsum-based technology, applied in the field of improving the mechanical properties of gypsum-based materials, can solve problems such as failure to support or hang heavy objects, and achieve the effects of solving poor mechanical properties, improving mechanical properties, and high fire rating

Active Publication Date: 2021-02-26
TAISHAN GYPSUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the strength of gypsum has been improved after adding various reinforcing agents, it still cannot meet the requirements for supporting or hanging heavy objects

Method used

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  • Method for improving mechanical properties of gypsum-based material
  • Method for improving mechanical properties of gypsum-based material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In parts by weight, 20 parts of construction gypsum powder (Taishan Gypsum No. 20~25μm, D75 is 45~50μm, D90 is 70~80μm, specific surface area is 4502m 2 / g), 16 parts of water, 1 part of mixing enhancer, said mixing enhancer consists of polyalkyd resin (389-9A, Shandong Aohui Paint Industry Co., Ltd.), polyacrylic acid emulsion (25 ℃ viscosity 12pa·s, solid Content 40wt%, BASF (China) Co., Ltd.), polyvinyl acetate-ethylene copolymer emulsion (vinyl acetate content in the copolymer is 25wt%, 25 ℃ viscosity 30Mpa s, solid content 10wt%, Changchun Chemical Co., Ltd.) according to Mixed with a mass ratio of 1:1:1, 0.5 parts of glass fiber (diameter 15μm, length 12mm, Taishan Fiberglass Co., Ltd.), mixed evenly by a mixer, poured into a mold of 40mm×40mm×160mm, solidified and formed, and then Dry at 150°C for 1 hour (the ambient relative humidity during the drying process is 10%), and then dry at 45°C to constant weight (the ambient relative humidity during the drying proce...

Embodiment 2

[0048] In parts by weight, 30 parts of construction gypsum powder (Taishan Gypsum No. 20~25μm, D75 is 45~50μm, D90 is 70~80μm, specific surface area is 4502m 2 / g), 24 parts of water, 1.2 parts of mixing enhancer, said mixing enhancer consists of phenolic resin (9021, Shandong Runda New Material Co., Ltd.), polyacrylic acid emulsion (25 ℃ viscosity 12pa s, solid content 40wt%, BASF (China) Co., Ltd.), polyvinyl acetate-ethylene copolymer emulsion (vinyl acetate content 25wt% in the copolymer, 25 ℃ viscosity 30Mpa s, solid content 10wt%, Changchun Chemical Co., Ltd.) according to mass ratio 2: It is made by mixing 1:1, 0.5 parts of glass fiber (diameter 15μm, length 12mm, Taishan Glass Fiber Co., Ltd.), after being mixed evenly by a mixer, poured into a mold of 40mm×40mm×160mm, solidified and formed, and then dried at 150°C 1h (the relative humidity of the environment during the drying process is 10%), and then dried at 45° C. to a constant weight (the relative humidity of the...

Embodiment 3

[0053]In parts by weight, 30 parts of building gypsum powder (Taishan Gypsum No. 20~25μm, D75 is 45~50μm, D90 is 70~80μm, specific surface area is 4502m 2 / g), 24 parts of water, 1.2 parts of mixing reinforcing agent, described mixing reinforcing agent is made of phenolic resin (9021, Shandong Runda New Material Co., Ltd.), polyvinyl acetate (6036, Changchun Chemical Co., Ltd.), epoxy resin (RDP-777, Shandong Runda New Material Co., Ltd.) mixed according to the mass ratio of 2:1:2, 0.5 parts of glass fiber (diameter 15μm, length 12mm, Taishan Glass Fiber Co., Ltd.), after mixing evenly with a mixer, inject In a mold of 40mm×40mm×160mm, solidify and form, then dry at 150°C for 1h (the relative humidity of the environment during the drying process is 10%), and then dry at 45°C to constant weight (the relative humidity of the environment during the drying process is 15%) to obtain high-strength gypsum-based materials.

[0054] According to the detection method in GB / T9775-2008 ...

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Abstract

The invention belongs to the field of building materials, and relates to a method for improving the mechanical property of a gypsum-based material. The method comprises the following steps that: a) gypsum powder, a reinforcing agent, a toughening agent, a hardening agent and water are mixed to obtain gypsum slurry, wherein the reinforcing agent comprises an acrylic polymer, polyisocyanate polyester, polyalkyd resin and the like, wherein the toughening agent comprises glass fibers, paper fibers and wood fibers, and the hardening agent comprises sodium silicate, quartz powder and sand; and b) solidifying and molding the gypsum slurry, and then performing drying to obtain the high-strength gypsum-based material. According to the method provided by the invention, the reinforcing agent, the toughening agent and the hardening agent of specific types are doped into the gypsum, so that the breaking strength, hardness and shearing strength of the gypsum-based material are greatly improved. Withthe method adopted, the problem of poorer mechanical property of a traditional gypsum-based material can be solved; the mechanical strength and nail-holding power of the prepared gypsum-based material can be comparable with those of a blockboard, and the gypsum-based material has a higher fireproof grade than the blockboard.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a method for improving the mechanical properties of gypsum-based materials. Background technique [0002] As a green and environmentally friendly material, gypsum material has the advantages of light weight, better sound insulation, and convenient construction, and is widely used in various buildings. However, due to the low compressive strength and shear force of traditional gypsum materials, they cannot provide sufficient support, so they can only be used as partition walls and filling materials, which greatly limits the application fields of gypsum materials. [0003] In order to improve the strength and shear force of gypsum-based materials, Chinese patent 201710648917.6 discloses a preparation process for high-strength gypsum boards, using acrylic acid monomers, NN-methylenebisacrylamide, and bamboo fibers to increase the strength. Chinese patent 201810984640.9 discloses t...

Claims

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Application Information

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IPC IPC(8): C04B28/16
CPCC04B28/16C04B2201/50C04B22/143C04B24/28C04B24/26C04B14/42C04B24/302C04B24/2623C04B24/281Y02W30/91
Inventor 贾同春曹志强任绪连武新民汤锐宗波李峰李涛宋晓光
Owner TAISHAN GYPSUM CO LTD
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