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Bottom layer brushing gypsum and application thereof

A technology for plastering gypsum and bottom layer, which is applied in the field of comprehensive utilization of chemical building materials and solid waste, and can solve the problems that the strength and hardness cannot meet the specific construction requirements, the formulation performance and optimization have been deeply studied, and the anti-cracking performance has decreased. Inhibition of shrinkage cracking, outstanding cost-effectiveness, and high flexural and compressive strength

Active Publication Date: 2010-10-06
上海每天节能环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Chinese patent documents CN1390796A, CN101423351A, and CN101580372A disclose methods for preparing plaster plaster with desulfurized gypsum and anhydrite as base materials, but the above-mentioned prior art has not conducted in-depth research on the performance and optimization of the formula, and there are still poor stability, strength and hardness Shortcomings such as failure to meet specific construction requirements
Under the condition of the same dosage, the total surface area of ​​fine sand is larger, while that of coarse sand is smaller, while the traditional process usually uses powdery quartz sand, which will bring anti-cracking after exceeding a certain thickness. performance degradation

Method used

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  • Bottom layer brushing gypsum and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Dosage of each component:

[0060] Construction gypsum 200kg 30 mesh quartz sand 360kg

[0061] 45 mesh quartz sand 150kg 60 mesh quartz sand 275kg

[0062] HPMC70000 3kg

[0063] Sodium-based bentonite (Zhejiang Yuhang Jiacheng Nonmetallic Mining Co., Ltd., the same below) 5kg

[0064] Retardan P 0.2kg ARBOCEL ZZC500 2kg

[0065] VINNAPAS5044N 5kg

[0066] Mix with non-gravity double-flying knife mixing equipment to prepare the bottom plaster.

Embodiment 2

[0068] Dosage of each component:

[0069] Construction gypsum 250kg 30 mesh quartz sand 335kg

[0070] 45 mesh quartz sand 150kg 60 mesh quartz sand 250kg

[0071] HPMC70000 3kg Sodium bentonite 5kg

[0072] Retardan P 0.25kg ARBOCEL ZZC500 2kg

[0073] VINNAPAS5044N 5kg

[0074] Mix with non-gravity double-flying knife mixing equipment to prepare the bottom plaster.

Embodiment 3

[0076] Dosage of each component:

[0077] Construction gypsum 300kg 30 mesh quartz sand 350kg

[0078] 45 mesh quartz sand 85kg 60 mesh quartz sand 250kg

[0079] HPMC70000 3kg Sodium bentonite 5kg

[0080] Retardan P 0.3kg ARBOCEL ZZC500 2kg

[0081] VINNAPAS5044N 5kg

[0082] Mix with non-gravity double-flying knife mixing equipment to prepare the bottom plaster.

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Abstract

The invention discloses a bottom layer brushing gypsum, which is prepared by mixing the following components in parts by weight: 200-500 parts of building gypsum, 485-785 parts of quartz sand, 3 parts of regulator, 5 parts of inorganic gel, 0.2-0.5 part of retarder and 2 parts of anti-cracking agent, wherein the quartz sand is one or the mixture of more than two of the quartz sands of 30 meshes, 40 meshes and 60 meshes in any proportion, the regulator is hydroxypropyl methyl cellulose, the inorganic gel is sodium bentonite, the retarder is a special retarder for polyphosphate gypsum, and the anti-cracking agent is lignocellulose; and the building gypsum is prepared by desulfurized gypsum according to the following method that the desulfurized gypsum enters a boiling calcinator after being pre-dried at the temperature of 80-90 DEG C, is calcined at the temperature of 120-130 DEG C, then is added into an impact type flour mill to be ground, and is prepared into the building gypsum after being cooled and aged. The invention has strong adhesive force, effectively inhibits the phenomenon of shrinkage cracking in plastering, and has good water resistance.

Description

(1) Technical field: [0001] The invention belongs to the technical field of comprehensive utilization of chemical building materials and solid wastes, and in particular relates to a method of using desulfurized gypsum as a main raw material to prepare plaster for bottom plastering. (two) background technology: [0002] Chinese patent documents CN1390796A, CN101423351A, and CN101580372A disclose methods for preparing stucco gypsum with desulfurized gypsum and anhydrite as base materials, but the above-mentioned prior art does not have in-depth research on the performance and optimization of the formula, and there are still poor stability, strength and hardness Shortcomings such as failure to meet specific construction requirements. [0003] At present, the bottom plaster plaster on the market is usually manufactured by mixing the purchased mixed sand with the surface plaster plaster in proportion. The performance of the product produced by this method is highly dependent on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B11/00C04B11/26
CPCC04B28/144C04B2111/34C04B2111/27
Inventor 李彦峰
Owner 上海每天节能环保科技股份有限公司
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