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High-strength water-resistant desulfurization gypsum board and preparation method thereof

A technology of desulfurized gypsum and gypsum board, applied in the field of gypsum board, can solve the problems of thermosetting resin modified desulfurized gypsum, hot pressing molding and water curing process, etc., achieve high density, good water resistance, and improve water resistance Effect

Active Publication Date: 2017-01-18
盐城市鼎力新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the prior art, for the treatment of the mechanical properties and water resistance of desulfurized gypsum, whether it is the method of polymer emulsion blending modification, or the method of directly mixing polymer glue for compression molding, there is no use of thermosetting resin modification. Desulfurization gypsum, hot-press molding and water curing process to produce high-density, high-strength, high-waterproof desulfurization gypsum boards with a structure of "thermosetting resin and dihydrate desulfurization gypsum crystal three-dimensional interpenetrating network"

Method used

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  • High-strength water-resistant desulfurization gypsum board and preparation method thereof
  • High-strength water-resistant desulfurization gypsum board and preparation method thereof
  • High-strength water-resistant desulfurization gypsum board and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Dissolve 1 g of phenolic resin, 0.1 g of silane coupling agent, and 0.02 g of propylene carbonate in absolute ethanol, stir evenly, and prepare a modified solution. Mix 3g of expansion agent with 100g of desulfurized gypsum, and manually stir for 2 minutes, then pass the stirred mixed dry powder through a 100 square hole sieve, put it in a cement slurry mixer and stir at a slow speed for 5 minutes until uniform, and make a solid mixed dry powder. Mix the modified liquid and the solid mixed dry powder to make a slurry, manually stir for 2 minutes, then place the slurry in a cement slurry mixer for automatic stirring, and dry it in a 50°C drying oven after the stirring is completed to make a modified Desulfurization gypsum dry powder.

[0032] After the modified desulfurized gypsum dry powder is loaded into the mold, it is hot-pressed at 160°C and 5MPa for 2 minutes. After the hot-pressed blocks are cooled, they are placed in an environment of 25°C and a relative humidit...

Embodiment 2

[0034] Dissolve 0.5g of phenolic resin, 0.05g of silane coupling agent, and 1g of propylene carbonate in absolute ethanol, and stir evenly to make a modification solution. Mix 0.5g of expansion agent with 70g of desulfurized gypsum, and manually stir for 2 minutes, then pass the stirred mixed dry powder through an 80 square hole sieve, put it in a cement slurry mixer and stir at a slow speed for 5 minutes until uniform, and make a solid mixed dry powder. Mix the modified liquid and the solid mixed dry powder to make a slurry, manually stir for 2 minutes, then place the slurry in a cement slurry mixer for automatic stirring, and dry it in a 50°C drying oven after the stirring is completed to make a modified Desulfurization gypsum dry powder.

[0035] After the modified desulfurized gypsum dry powder is loaded into the mold, it is hot-pressed at 90°C and 5MPa for 1 minute. After the hot-pressed blocks are cooled, they are placed in an environment of 20°C and a relative humidity...

Embodiment 3

[0037] Dissolve 10g of phenolic resin, 2g of silane coupling agent, and 5g of propylene carbonate in absolute ethanol, and stir well to make a modified solution. Mix 10g of expansion agent with 100g of desulfurized gypsum, manually stir for 2min, then pass the stirred mixed dry powder through a 100 square hole sieve, put it in a cement slurry mixer and stir at a slow speed for 5min until uniform, and make a solid mixed dry powder. Mix the modified liquid and the solid mixed dry powder to make a slurry, manually stir for 2 minutes, then place the slurry in a cement slurry mixer for automatic stirring, and dry it in a 50°C drying oven after the stirring is completed to make a modified Desulfurization gypsum dry powder.

[0038] After the modified desulfurized gypsum dry powder is loaded into the mold, it is hot-pressed at 200°C and 20MPa for 5 minutes. After the hot-pressed blocks are cooled, they are placed in an environment of 90°C and a relative humidity of 99%, and cured fo...

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Abstract

The invention discloses a high-strength water-resistant type desulfurized gypsum board and a manufacturing technique, and belongs to the technical field of gypsum board. The high-strength water-resistant type desulfurized gypsum board solves the problem that the desulfurized gypsum board manufactured with the existing technology is non-dense in microstructure, bad in tenacity and bad in water resistance. The main components of the desulfurized gypsum board mainly comprises desulfurized gypsum, swelling agent, phenolic resin, propylene carbonate, silane coupling agent and polymer emulsion and water of which solid content is 0-10%. The parepartion method of the desulfurized gypsum board comprises the steps that the desulfurized gypsum is modified through the phenolic resin firstly, and then thermo-compression formation is conducted on the modified desulfurized gypsum dry powder for 1 min to 5 min in the state that the pressure ranges from 5 MPa to 20 MPa, and the temperature ranges from 90 DEG C to 200 DEG C; finally, the molded desulfurized gypsum board is soaked into the polymer emulsion for 10 min to 120 min, and the soaking temperature ranges from 25 DEG C to 70 DEG C. The desulfurized gypsum board is excellent in compressive strength, in breaking strength and in water-resistant performance.

Description

technical field [0001] The invention belongs to the technical field of gypsum boards, in particular to a high-strength water-resistant desulfurized gypsum board and a preparation method thereof. Background technique [0002] Desulfurization gypsum comes from solid emissions from industrial enterprises burning coal or oil after treating sulfur dioxide in flue gas. The reuse of desulfurized gypsum can realize the recycling of solid waste, which not only improves economic benefits, but also beautifies the environment. The application technology of desulfurized gypsum in the building materials industry in my country mainly focuses on the production of cement, desulfurized gypsum blocks, thermal insulation mortar, plastering plaster, and concrete modification. In terms of board production, it is mainly used to make wall panels, floors, ceilings, etc. [0003] The low mechanical properties and poor waterproof performance of desulfurized gypsum boards seriously restrict the appli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B28/16C04B24/30
Inventor 吴其胜朱哲誉
Owner 盐城市鼎力新材料有限公司