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Preparation method of anti-cracking type waterproof gypsum board

A technology for gypsum boards and preparation steps, which is applied in the field of preparation of crack-resistant waterproof gypsum boards, which can solve the problems of poor moisture resistance and easy cracking of gypsum boards, and achieve the effects of enhancing mechanical properties, improving crack resistance, and improving bonding strength

Inactive Publication Date: 2018-01-12
郭迎庆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a method for preparing a crack-resistant waterproof gypsum board in view of the defects of poor moisture resistance and easy cracking in the current gypsum board

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025]Weigh 80g of wollastonite and grind it for 10 minutes, pass through a 100-mesh sieve, collect the sieved powder, put the sifted powder into a kiln at 1000°C and melt for 1 hour to obtain a molten liquid, remove air bubbles, and transport it to a porous leak plate , at a rotating speed of 2400r / min to draw the wire, to obtain the self-made wollastonite fiber precursor, mix the self-made wollastonite fiber precursor and polyethylene glycol stearate in a mixer at a mass ratio of 4:1, and After stirring at 45°C for 1 hour, modified wollastonite fibers were obtained. Weigh 18g of cornstarch, add 80mL of deionized water to the cornstarch, mix and stir at 65°C for 1 hour, and obtain starch paste after stirring. Cool to 30°C, adjust the pH to 4 with 3% hydrochloric acid to obtain a starch mixture, then add 4g of isoamylase to the starch mixture and perform enzymatic hydrolysis at 25°C for 35 minutes, filter and remove the filter residue after enzymatic hydrolysis to obtain The f...

example 2

[0027] Weigh 90g of wollastonite and grind it for 11 minutes, pass through a 100-mesh sieve, collect the sieved powder, put the sifted powder into a kiln at 1100°C and melt for 2 hours to obtain a molten liquid, remove air bubbles, and transport it to a porous leak plate , at a rotating speed of 3000r / min to draw the wire, to obtain the self-made wollastonite fiber precursor, mix the self-made wollastonite fiber precursor and polyethylene glycol stearate in a mixer at a mass ratio of 4:1, and After stirring at 55°C for 1.5h to obtain modified wollastonite fiber, weigh 25g of corn starch, add 90mL of deionized water to the cornstarch, mix and stir at 70°C for 1.5h, and obtain starch paste after stirring. Cool the paste liquid to 40°C, adjust the pH to 5 with 3% hydrochloric acid to obtain a starch mixture, then add 5g of isoamylase to the starch mixture and perform enzymatic hydrolysis at 30°C for 45 minutes, filter to remove the filter residue after enzymatic hydrolysis , the ...

example 3

[0029] Weigh 100g of wollastonite and grind it for 12 minutes, pass through a 100-mesh sieve, collect the sieved powder, put the sifted powder into a kiln at 1200°C and melt for 3 hours to obtain a molten liquid, remove air bubbles, and transport it to a porous leak plate , at a rotating speed of 3200r / min to draw the wire, to obtain the self-made wollastonite fiber precursor, mix the self-made wollastonite fiber precursor and polyethylene glycol stearate in a mixer at a mass ratio of 4:1, and After stirring at 65°C for 2 hours, the modified wollastonite fiber was obtained. Weigh 30g of cornstarch, add 100mL of deionized water to the cornstarch, and mix and stir at 85°C for 2h. After stirring, a starch paste was obtained, and the starch paste was Cool to 45°C, adjust the pH to 6 with 3% hydrochloric acid to obtain a starch mixture, then add 6g of isoamylase to the starch mixture and perform enzymatic hydrolysis at 35°C for 60 minutes, and filter to remove the filter residue aft...

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PUM

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Abstract

The invention discloses a preparation method of anti-cracking type waterproof gypsum board, and belongs to the technical field of preparation of boards. The preparation method is characterized in thatpolyethylene glycol stearate is used for modifying self-prepared wollastonite raw fibers, the wollastonite is drawn into wollastonite with a fiber-shaped structure, the starch is subject to double modifying by epichlorohydrin and succinic anhydride when the wollastonite is stirred and added into a gypsum matrix, a board core and a board body form an interface with certain strength, and the hydrophobicity of the starch is realized by hydroxyl substitution in the etherification process; because the crosslinking density in the starch structure is increased, the absorbing of water is also limitedby crosslinking treatment; montmorillonoid and fly ash are added into the gypsum powder, a water-resistant hydration product is generated in the gypsum hydration process, the porosity of the gypsum powder is reduced, and the hole diameter is reduced; paraffin and polyethylene glycol are added, the paraffin is emulsified and then uniformly mixed with a gypsum frame, waterproof agents of sodium trimethylsilanolate and calcium oxalate are coated to the surface of the self-prepared gypsum board blank, and then the waterproof property of the gypsum board is further improved.

Description

technical field [0001] The invention discloses a preparation method of a crack-resistant waterproof gypsum board, which belongs to the technical field of board preparation. Background technique [0002] Waterproof gypsum board refers to this kind of stone board. When it is tested for waterproofing according to the American ASTM standard, its water absorption rate is 5%, that is, it can be used in areas with high humidity, such as toilets, bathrooms and kitchens. The board is made of gypsum A certain amount of waterproof agent is added to the core material to make the gypsum itself have a certain waterproof performance. In addition, gypsum board paper is also treated with waterproofing, so this is a better board with a wider range of uses. However, this board should not be directly exposed to a humid environment, nor should it be immersed in water for a long time. [0003] There are three types of gypsum boards in China: paper gypsum boards, fiber gypsum boards and hollow g...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B41/64C04B24/38C04B20/02C04B14/46
Inventor 郭迎庆杨立军陈莉莉
Owner 郭迎庆
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