Gypsum-based dry-mixed mortar and preparation method thereof

A technology of gypsum and sand mixing, applied in the direction of additive processing, can solve the problems of poor performance of gypsum products, prone to frost, influence, etc., to improve durability and construction performance, improve crack resistance, and improve coating rate. Effect

Pending Publication Date: 2022-01-25
BEIJING NEW BUILDING MATERIALS PLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Desulfurized gypsum with high content of impurity ions has adverse effects on the performance of gypsum products. For example, the surface of gypsum-based products prepared with desulfurized gypsum with high content of impurity ions is prone to problems such as frosting.

Method used

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  • Gypsum-based dry-mixed mortar and preparation method thereof
  • Gypsum-based dry-mixed mortar and preparation method thereof
  • Gypsum-based dry-mixed mortar and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0059] (1) Mix 100kg of sulfur-containing coal and 1.74kg of calcium carbonate uniformly to make briquettes, and to form coal ash after fully burning at 1200°C. The main chemical components are determined as follows:

[0060]

[0061] Pulverize the coal ash to 80 mesh.

[0062] (2) Calcining low-quality desulfurized gypsum to prepare low-quality gypsum clinker (the prepared clinker is β-type hemihydrate gypsum), and the dihydrate gypsum content (DH) in the aged low-quality desulfurized clinker is 1.6wt.%. , anhydrous gypsum (AⅢ) is 1.3wt.%; Grinding, sealing for subsequent use, obtaining particle size is 200 orders, and D50 is the low-quality gypsum clinker of 40 μm to 50 μm;

[0063] (3) 100kg of low-quality gypsum clinker powder prepared in step (2), 0.5kg of zeolite powder and 10kg of prepared coal ash slag were mixed uniformly to obtain mixture 1;

[0064] (4) Test the standard consistency water consumption of the mixed powder (the mixture obtained by mixing 100kg of l...

Embodiment 2

[0069] The difference between embodiment 2 and embodiment 1 lies in step (3). Step (3): 100kg of gypsum powder prepared in step (1), 0.5kg of zeolite powder and 15kg of prepared coal ash are mixed evenly;

Embodiment 3

[0071] The difference between embodiment 2 and embodiment 1 lies in step (3). Step (3): 100kg of gypsum powder prepared in step (1), 0.5kg of zeolite powder and 5kg of prepared coal ash are mixed evenly;

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Abstract

The invention provides a gypsum-based dry-mixed mortar material and a preparation method thereof. The gypsum-based dry-mixed mortar material comprises low-quality gypsum clinker, a base material containing calcium oxide, sulfur, aluminum oxide, silicon oxide and the like, zeolite and quick lime. The gypsum-based mortar with excellent performance is prepared by taking the low-quality gypsum with high impurity content as a main body material; meanwhile, solidification of impurity ions (chloride ions and sodium ions) is realized, resource utilization of the low-quality gypsum is realized, and the gypsum-based mortar provided by the invention has good workability, durability and construction performance and is suitable for industrial production; wherein the dry volume weight of the gypsum-based mortar is reduced while the setting time of the gypsum-based mortar is effectively adjusted, so that the coating rate of the mortar is increased, and the crack resistance of the mortar is improved.

Description

technical field [0001] This article relates to but not limited to the technical field of new building materials, especially to but not limited to a gypsum-based dry-mixed mortar and a preparation method thereof. Background technique [0002] Desulfurization gypsum is a kind of solid waste from power plants, and its quality and quality vary greatly depending on the desulfurization technology and equipment conditions of power plants. At present, the desulfurization gypsum produced by nearly 50% of thermal power enterprises in my country has high water content, low grade, and high content of chloride ions and sodium ions. Desulfurized gypsum with high content of impurity ions has adverse effects on the performance of gypsum products. For example, the surface of gypsum-based products prepared with desulfurized gypsum with high content of impurity ions is prone to problems such as frosting. Therefore, it is of great significance to study how to use low-quality gypsum with high i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/36C04B28/14C04B11/028B33Y70/10
CPCC04B28/36C04B28/365C04B28/147C04B11/028B33Y70/10C04B2201/50C04B2201/32C04B2111/00181C04B14/047C04B18/103C04B2103/302C04B2103/465C04B22/064C04B24/026C04B24/2623
Inventor 杨正波王丽陈红霞刘文君冉秀云
Owner BEIJING NEW BUILDING MATERIALS PLC
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