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Composition for self-compacting gypsum board, board and composite board including same

A composite board and composition technology, which is applied in building thermal insulation materials, fire protection, building components, etc., can solve the problems of water resistance, easy collapse and mildew of boards, and easy mildew of kraft paper.

Active Publication Date: 2022-05-27
王柏泉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest disadvantage of ordinary gypsum board is that it is not resistant to water, kraft paper is easy to mildew, and the board is easy to collapse and mildew when used for suspended ceilings soaked in water

Method used

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  • Composition for self-compacting gypsum board, board and composite board including same
  • Composition for self-compacting gypsum board, board and composite board including same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Material name Weight % Portland cement 0 plaster 38 Coarse sand 15 Sand 15 Heavy calcium powder 30 Dispersible latex powder 0 Polycarboxylic acid superplasticizer 1.2 Polyether defoamer 0.3 SG-11 gypsum retardant 0.1 Lithium carbonate early strength agent 0.2 Hydroxypropyl methylcellulose 0.2

[0025] After mixing the above materials evenly, add 25% by weight of water and stir thoroughly to obtain a slurry with good fluidity. The obtained slurry is placed in the plate forming mold and left to form a smooth surface without pores. The size of the plate is: 15 cm× 35 cm × 0.8 cm.

[0026] According to gb / T9775-2008 standard, the compressive strength measured for one day is 12.6 MPa, and the absolute dry compressive strength is 22.3 MPa for 28 days. The compressive strength measured after 15 days of immersion was 0.8Mpa.

Embodiment 2

[0028] Material name Weight % Portland cement 10 plaster 28 Coarse sand 15 Sand 15 Heavy calcium powder 30 Dispersible latex powder 0 Polycarboxylic acid superplasticizer 1 Polyether defoamer 0.3 GS-11 gypsum retardant 0.05 Lithium carbonate early strength agent 0.5 Hydroxypropyl methylcellulose 0.15

[0029] After mixing the above materials evenly, add 20% by weight of water and stir thoroughly to obtain a slurry with good fluidity. The obtained slurry is placed in the plate forming mold and left to form a smooth surface without pores. The size of the plate is: 15 cm× 35 cm × 0.8 cm.

[0030] According to the GB / T9775-2008 standard, the compressive strength measured for one day is 16.85MPa, and the absolute dry compressive strength is 28.98MPa for 28 days. The compressive strength measured after 15 days of immersion was 14.62Mpa.

Embodiment 3

[0032] Material name Weight % Portland cement 10 plaster 38 Coarse sand 15 Sand 15 Heavy calcium powder 20 Dispersible latex powder 0 Polycarboxylic acid superplasticizer 1 Polyether defoamer 0.3 SG-11 gypsum retardant 0.05 Lithium carbonate early strength agent 0.5 Hydroxypropyl methylcellulose 0.15

[0033] After mixing the above materials evenly, add 22% by weight of water and stir thoroughly to obtain a slurry with good flowability. The obtained slurry is placed in the plate forming mold and left to form a smooth surface without pores. The size of the plate is: 15 cm× 35 cm × 0.8 cm.

[0034] According to the GB / T9775-2008 standard, the compressive strength measured for one day is 19.4 MPa, and the absolute dry compressive strength for 28 days is 30.8 MPa. The compressive strength measured after 15 days of immersion was 18.3Mpa.

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Abstract

The present invention relates to a composition for self-compacting gypsum board materials, said composition comprising: 18-38% by weight of gypsum; 10-30% by weight of coarse sand; 10-30% by weight of fine sand; 20-35% by weight % heavy calcium powder filler; appropriate amount of water reducer, defoamer, retarder, early strength agent, thickener, the above weight % is based on the total weight of the composition. The present invention also relates to a slurry prepared by mixing the composition for self-compacting gypsum boards with water and a gypsum board formed from the slurry. The board has the required performance and good processing performance. It can be sawed, nailed and planed. It has good nail holding power, small shrinkage and no deformation. The board is resistant to water immersion and has certain water absorption. It is especially suitable for various water-based adhesives. The veneer is an ideal board for manufacturing all kinds of environmental protection and fireproof decorative boards.

Description

Technical field [0001] The present invention relates to a building material, in particular to a composition for self-compacting gypsum-based panels, a self-compacting gypsum-based plate formed by the composition and a composite plate comprising the plate. Background [0002] The existing paper gypsum board is made of gypsum, wood chips and perlite as the main material of the plate, mixed with water and spread into a paste in the middle of two layers of kraft paper roll pressed, kraft paper as a reinforcing material located on the two surfaces of the plate. The biggest disadvantage of ordinary gypsum board is that it is not resistant to water, kraft paper is easy to mold, and the plate is easy to collapse and mildew after the ceiling is immersed in water. Contents of the Invention [0003] Object of the present invention is to provide a self-compacting gypsum-based composition for sheet, the composition of gypsum as the main cementitious material, coarse, fine sand as aggregate, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14E04B1/66E04B1/94
CPCC04B28/14E04B1/94E04B1/66C04B2201/50C04B14/06C04B14/28C04B24/383C04B22/10C04B24/32C04B2103/302C04B2103/22C04B22/00C04B2103/0054
Inventor 王柏泉
Owner 王柏泉