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Modified gypsum-based building board with thermal insulation performance and waterproof performance

A gypsum-based, construction technology, applied in the field of new functional materials, can solve the problems of poor air permeability, wear resistance and durability of coatings, poor water resistance of gypsum, limiting the application scope, and reducing the performance of gypsum boards, and achieves the reduction of water absorption, Hydrophobicity and physical and mechanical properties guarantee, the effect of mechanical properties improvement

Inactive Publication Date: 2019-01-15
合肥凯大新型材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Gypsum thermal insulation materials have the advantages of light weight, fire prevention, thermal insulation, heat insulation, and recyclability, but the poor water resistance of gypsum limits its application range in various fields, especially in the construction field. As thermal insulation materials, waterproof, thermal insulation Properties such as strength and strength are significantly affected by the environment, and the service life cannot be guaranteed in exterior wall decoration and humid indoor environments
Most of the existing solutions are to apply a layer of waterproof paint on the surface of the gypsum board to improve the water resistance, but the paint has poor air permeability, wear resistance and durability, which reduces the performance of the gypsum board.

Method used

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  • Modified gypsum-based building board with thermal insulation performance and waterproof performance

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Experimental program
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Effect test

Embodiment 1

[0017] A modified gypsum-based building board with thermal insulation and water resistance, made of the following ingredients in parts by weight: 120 parts of gypsum powder, 4.5 parts of modified filler, 14 parts of plant foaming agent, aminopropyl triethoxy 1.0 part of silane, 0.5 part of sodium trimetaphosphate, 0.1 part of potassium sulfate, 1.5 parts of calcium carbonate, 7.0 parts of water-based epoxy resin emulsion, 16 parts of water, the preparation method of the modified filler comprises the following steps:

[0018] (1) Mix 15 grams of zeolite powder and 3.9 grams of basalt fiber, place in a muffle furnace, raise the temperature to 550°C, keep the temperature for calcination for 2.0 hours, cool to room temperature naturally with the furnace, grind to pass through a 180 mesh sieve, and mix with sodium borate Mix according to the mass ratio of 1.8:0.3, and add it to 50 ml of hot water at 60°C, stir to obtain the mixture, add 150 ml of sodium hydroxide solution to the bea...

Embodiment 2

[0026] A modified gypsum-based building board with thermal insulation and water resistance, made of the following components in parts by weight: 122 parts of gypsum powder, 4.8 parts of modified filler, 15 parts of plant foaming agent, aminopropyl triethoxy 1.1 parts of silane, 0.55 parts of sodium trimetaphosphate, 0.15 parts of potassium sulfate, 1.6 parts of calcium carbonate, 7.5 parts of water-based epoxy resin emulsion, 18 parts of water, the preparation method of the modified filler comprises the following steps:

[0027] (1) Weigh 15.5 grams of zeolite powder and 3.95 grams of basalt fiber, put them in a muffle furnace, raise the temperature to 565 ° C, keep the temperature for calcination for 2.2 hours, cool to room temperature naturally with the furnace, grind to pass through a 190-mesh sieve, and mix with sodium borate Mix according to the mass ratio of 1.9:0.35, and add to 55 ml of hot water at 62°C, stir to obtain the mixture, add 155 ml of sodium hydroxide solutio...

Embodiment 3

[0035] A modified gypsum-based building board with thermal insulation and water resistance, which is made of the following components in parts by weight: 125 parts of gypsum powder, 5.0 parts of modified filler, 16 parts of plant foaming agent, aminopropyl triethoxy 1.2 parts of silane, 0.6 part of sodium trimetaphosphate, 0.2 part of potassium sulfate, 1.8 parts of calcium carbonate, 8.0 parts of water-based epoxy resin emulsion, 20 parts of water, the preparation method of the modified filler comprises the following steps:

[0036] (1) Weigh 16 grams of zeolite powder and 4.0 grams of basalt fiber, mix them in a muffle furnace, raise the temperature to 580 ° C, keep the heat for calcination for 2.5 hours, cool to room temperature naturally with the furnace, grind to pass through a 200-mesh sieve, and mix with sodium borate Mix according to the mass ratio of 2.0:0.4, and add it to 60 ml of hot water at 65°C, stir to obtain the mixture, add 160 ml of sodium hydroxide solution t...

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Abstract

The invention discloses a modified gypsum-based building board with thermal insulation performance and waterproof performance, belonging to the technical field of novel functional materials. Accordingto the invention, gypsum is used as a matrix material, and a modified filler, a plant foaming agent and a water-based epoxy resin emulsion are added; the prepared porous light hydrophobic filler is added to a gypsum gel; structural modification is performed during foaming, so crystallization stability is improved, and thus, the water absorption rate of a gypsum material is decreased and the hardness of the produced building board is improved; the plant foaming agent has fine and stable foam and stable thermodynamic performance, so the problem of reduced water resistance of the gypsum thermal-insulation material due to the increase of porosity is overcome, and the mechanical strength and the thermal insulation performance of the material are improved; and the thermal conductivity and the water absorption rate of the material are reduced to 0.145 W / mK and 0.24%, respectively, so the material is adaptive to a variety of climate changes and humid environments and significantly prolongs the service life of gypsum-based building board.

Description

technical field [0001] The invention belongs to the technical field of new functional materials, and in particular relates to a modified gypsum-based building board with thermal insulation and water resistance. Background technique [0002] Gypsum is a monoclinic mineral, a hydrate whose main chemical composition is calcium sulfate (CaSO4). Gypsum is a versatile industrial and construction material. It can be used in cement retarder, gypsum building products, model making, medical food additive, sulfuric acid production, paper filler, paint filler, etc. The microporous structure and heating dehydration of gypsum and its products make it have excellent sound insulation, heat insulation and fireproof performance. Gypsum board is a material made of building gypsum as the main raw material. It is a building material with light weight, high strength, thin thickness, convenient processing, sound insulation, heat insulation and fire resistance. It is one of the new lightweight p...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B38/10C04B24/38C04B38/08
CPCC04B28/14C04B38/10C04B40/0046C04B2111/27C04B2201/32C04B24/00C04B24/42C04B22/16C04B22/147C04B22/10C04B24/281C04B22/002C04B14/047C04B14/4643C04B22/08C04B22/062C04B22/087C04B22/004C04B24/383C04B38/08
Inventor 张海涛
Owner 合肥凯大新型材料科技有限公司
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