A light-weight high-strength paper-faced gypsum board and its preparation method

A paper-faced gypsum board and high-strength gypsum technology, which is applied in the field of building materials and gypsum boards, can solve the problems of the decline of the mechanical properties of the gypsum board, the edge of the gypsum board no longer having strength, and the edge overheating, etc., and achieves excellent mechanical properties. Mechanical properties, the effect of slurry densification

Active Publication Date: 2021-12-17
CHINA NAT BUILDING MATERIALS TECHCAL INNOVATION & RES INST LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the foaming agent is added in a large amount, the mechanical properties of the gypsum board will be reduced, and the edge of the gypsum board is prone to "overfire" when it is dry, that is, calcium sulfate dihydrate is decomposed into calcium sulfate hemihydrate or calcium sulfate anhydrous, and gypsum The edge of the board no longer has strength, and defective or substandard products appear

Method used

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  • A light-weight high-strength paper-faced gypsum board and its preparation method
  • A light-weight high-strength paper-faced gypsum board and its preparation method
  • A light-weight high-strength paper-faced gypsum board and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] This embodiment provides a light-weight high-strength paper-faced gypsum board. The paper-faced gypsum board includes upper and lower face papers and a gypsum board core between the two layers of face paper. The gypsum board core consists of denser layers of lesser thickness and lower density layers of greater thickness. The thickness of the dense layer is 1 / 8 of the thickness of the gypsum board, and it is made of the following raw materials in parts by mass: high-strength gypsum: 100 parts, water: 35 parts. The thickness of the low-density layer is 7 / 8 of the thickness of the gypsum board, and it is made of the following raw materials in parts by mass: building gypsum clinker: 100 parts; modified corn starch: 0.5 parts; BASF312 high-efficiency water reducer: 0.05 parts; Foaming agent prepared by compounding sodium dialkyl sulfate and silicone resin polyether emulsion at a mass ratio of 1:1: 0.08 parts; water: 80 parts.

[0047] The light-weight high-strength paper-fa...

Embodiment 2

[0054] This embodiment provides a light-weight high-strength paper-faced gypsum board. The paper-faced gypsum board includes two layers of protective paper and a gypsum board core between the two layers of protective paper. The gypsum board core consists of denser layers of lesser thickness and lower density layers of greater thickness. The thickness of the dense layer is 1 / 9 of the thickness of the gypsum board, and it is made of the following raw materials in parts by mass: high-strength gypsum: 100 parts, water: 32 parts. The thickness of the low-density layer is 8 / 9 of the thickness of the gypsum board, and it is made of the following raw materials in parts by mass: construction gypsum clinker: 100 parts; modified tapioca starch: 0.2 parts; Sika 540P water reducer: 0.08 parts; Foaming agent prepared by compounding sodium lauryl sulfate and silicone resin polyether emulsion at a mass ratio of 1:1: 0.05 parts; water: 70 parts.

[0055] The preparation method of the lightwei...

Embodiment 3

[0057] This embodiment provides a light-weight high-strength paper-faced gypsum board. The paper-faced gypsum board includes two layers of protective paper and a gypsum board core between the two layers of protective paper. The gypsum board core consists of denser layers of lesser thickness and lower density layers of greater thickness. The thickness of the dense layer is 1 / 10 of the thickness of the gypsum board, and it is made of the following raw materials in parts by mass: high-strength gypsum: 100 parts, water: 38 parts. The thickness of the low-density layer is 9 / 10 of the thickness of the gypsum board, and it is made of the following raw materials in parts by mass: building gypsum clinker: 100 parts; modified corn starch: 0.9 parts; Sika 325C water reducer: 0.18 parts; Foaming agent prepared by compounding sodium lauryl sulfate and silicone resin polyether emulsion: 0.09 parts; water: 65 parts.

[0058] The preparation method of the lightweight high-strength gypsum boa...

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Abstract

The invention provides a light-weight high-strength paper-faced gypsum board and a preparation method thereof. The paper-faced gypsum board includes a board core and face-protecting paper, and the gypsum board core includes a dense layer with a small thickness and a low-density layer with a large thickness; the raw materials of the dense layer include: high-strength gypsum and water; the The raw materials of the low-density layer include: construction gypsum clinker, modified starch, water reducing agent, foaming agent and water. The preparation method of the gypsum board is as follows: the dense layer slurry is poured on the lower protective paper; the low-density layer slurry is poured on the dense layer slurry; the upper protective paper and the low-density layer slurry are lapped and bonded firmly, The wet board is prepared; after the wet board is solidified, it enters the dryer, and the dried wet board is a light-weight high-strength gypsum board. The prepared gypsum board can not only increase the bonding strength between the protective paper and the gypsum board, improve the mechanical properties of the gypsum board, but also prevent the gypsum board from being "overfired" when it is dry.

Description

technical field [0001] The invention relates to the technical field of building materials and gypsum boards, in particular to a light-weight high-strength paper-faced gypsum board and a preparation method thereof. Background technique [0002] Paper-faced gypsum board is a board made of building gypsum as the main raw material, mixed with appropriate amount of additives as the board core, and made of special cardboard as the surface protection. Gypsum board has the advantages of no pollution, strong processing performance, and simple construction method. [0003] In recent years, the production of low-density gypsum boards has been a research hotspot on the basis of ensuring the strength and other properties of the gypsum boards. Low-density paper-faced gypsum board can reduce production and transportation energy consumption, reduce construction labor intensity, and is conducive to the application in prefabricated buildings. It has become the development trend of the intern...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/10C04B28/14E04C2/26E04F13/08
CPCC04B28/147E04C2/26E04F13/0866C04B2111/40C04B2201/20C04B2201/50C04B24/38C04B2103/302C04B2103/40C04B2103/48C04B38/10C04B38/0067
Inventor 张晓菲陈红霞刘文君葛俊巧周全光冉秀云李帆
Owner CHINA NAT BUILDING MATERIALS TECHCAL INNOVATION & RES INST LIMITED
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