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Desulfurated gypsum self-leveling material and preparation method thereof

A desulfurized gypsum and self-leveling technology, applied in the field of building materials, achieves the effects of simple production process, low production cost and good water resistance

Inactive Publication Date: 2007-10-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no self-leveling material preparation technology with desulfurized gypsum as the main component in China.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Desulfurization gypsum 60%

[0033] Aluminate cement 30%

[0034] Portland cement 0%

[0035] Fly Ash 0%

[0036] Redispersible polymer powder VINNAPAS  5011L 0%

[0037] Superplasticizer SUNBO PC-1016 0.4%

[0038] Water retaining agent HT-K4000 0.4%

[0039] Defoamer XPJ820 0.2%

[0040] Fine river sand 9%

[0041] Prepare the self-leveling material according to the mass percentage specified in the above table, add water according to the water-cement ratio of 0.30 and mix well before construction. The basic properties of this formula are: fluidity 230mm, working time greater than 30min, compressive strength 20MPa. This recipe is suitable as a cushion.

Embodiment 2

[0043] Desulfurized gypsum 45%

[0044] Aluminate cement 25%

[0045] Portland cement 0%

[0046] Fly Ash 0%

[0047] Redispersible polymer powder VINNAPAS  5011L 2%

[0048] Superplasticizer SUNBO PC-1016 0.35%

[0049] Water retaining agent HT-K4000 0.4%

[0050] Defoamer XPJ820 0.25%

[0051] Fine river sand 27%

[0052] Prepare the self-leveling material according to the mass percentage specified in the above table, add water according to the water-cement ratio of 0.33 and mix well before construction. The basic properties of this formula are: fluidity 220mm, working time greater than 30min, compressive strength 25MPa. This recipe is suitable as a cushion.

Embodiment 3

[0054] Desulfurized gypsum 40%

[0055] Aluminate cement 30%

[0056] Portland cement 10%

[0057]Fly Ash 0%

[0058] Redispersible polymer powder VINNAPAS  5011L 3.4%

[0059] Superplasticizer SUNBO PC-1016 0.6%

[0060] Water retaining agent HT-K4000 0.3%

[0061] Defoamer XPJ820 0.7%

[0062] Fine river sand 15%

[0063] Prepare the self-leveling material according to the mass percentage specified in the above table, add water according to the water-cement ratio of 0.37 and mix well before construction. The basic properties of this formula are: fluidity 230mm, working time greater than 30min, compressive strength 30MPa. This formula is suitable as a cushion and top coat.

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Abstract

The invention discloses a desulfurizing plaster self-leveling material, which main component weight percent are as follows: 30-65% desulfurizing plaster, 25-60% high-alumina cement, 0-30% ordinary portland cement, 0-20% fly ash, 0-8.0% redispersing emulsion powder. The material comprises an amount of additive and fine aggregate. Blending each component at determined weight percent fully and uniformly in a blender, packing to get self-leveling material. The invention can prepare self-leveling material by desulfurizing plaster massively, has more simple manufacturing technique, less energy consumptions, low cost, moderate coagulation time, strong and better water resistance, microswelling performance, can be widely applied to kinds of leveling execution.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a self-leveling material mainly composed of desulfurized gypsum and aluminate cement and a preparation method thereof. Background technique [0002] my country's energy structure is dominated by coal combustion, and the sulfur dioxide produced by coal combustion is an important factor leading to air pollution and acid rain. Therefore, flue gas desulfurization has become a commonly used pollution control technology. Calcium-based wet flue gas desulfurization is the most widely used flue gas pollution control technology, which produces a large number of flue gas desulfurization by-products - desulfurization gypsum. Desulfurization gypsum is mainly composed of calcium sulfate containing two crystal waters, and the grade is generally about 90% based on calcium sulfate dihydrate. At present, desulfurization gypsum is mainly used to prepare construction gypsum, and there ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B28/06C04B18/08C04B14/06C04B24/24C04B24/38C04B24/40C04B103/30C04B103/46C04B103/50
CPCC04B28/144Y02W30/91C04B7/02C04B7/32C04B14/02C04B18/08C04B20/0092C04B24/26C04B2103/302C04B2103/46C04B2103/50
Inventor 官宝红楼文斌吴忠标曾爱斌赵伟荣刘越
Owner ZHEJIANG UNIV
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