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Gypsum slurry as well as preparation method and application thereof

A technology of gypsum slurry and gypsum, which is applied in the field of gypsum slurry and its preparation, and can solve the problems of prolonging the drying time of paper-faced gypsum boards, setting time of gypsum boards, and high water consumption for mixing.

Inactive Publication Date: 2020-10-20
SHANXI SUNWAY INTION TRADE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in the production of most gypsum boards, the quality of gypsum raw materials fluctuates, so that when the gypsum slurry reaches the standard consistency, the amount of mixing water is high, which affects the setting time of the gypsum board and also causes more moisture inside the formed gypsum board. It not only affects the production speed of gypsum board, but also prolongs the drying time of gypsum board, which increases the energy consumption of production

Method used

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  • Gypsum slurry as well as preparation method and application thereof
  • Gypsum slurry as well as preparation method and application thereof
  • Gypsum slurry as well as preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example 1

[0033] Sulfonic acid group modified polycarboxylate water reducer, refer to "Synthesis and performance research of sulfonic acid group modified polycarboxylate water reducer" (Gao Yujun et al., "Chemical Research and Application", Volume 29, Issue 4 , April 2017, DOI: 10.3969 / j.issn.1004-1656.2017.04.011). The specific preparation method is: APEG-700 modified with sulfonic acid group is used as the optimal comonomer, and in the copolymerization system n(TPEG):n(APEGS):n(AA):n(MA):n(EVAc) The ratio is 1.0:0.25:3.0:2.0:1.0, the synthesized sulfonic acid group modified polycarboxylate water reducer.

Embodiment 1

[0035] (1) Mix the modified starch, the sulfonic acid-modified polycarboxylate water reducer obtained in Preparation Example 1, sodium lauryl sulfate, sodium sulfate and water to obtain solution I;

[0036] (2) Mix desulfurized gypsum that has been dried at 80° C. for 1 hour and cooled to room temperature with solution I to obtain gypsum slurry.

[0037] Wherein, the consumption of each substance is:

[0038]

[0039]

Embodiment 2

[0041] (1) Mix the modified starch, the sulfonic acid-modified polycarboxylate water reducer obtained in Preparation Example 1, sodium lauryl sulfate, sodium sulfate and water to obtain solution I;

[0042] (2) Mix desulfurized gypsum that has been dried at 80° C. for 1 hour and cooled to room temperature with solution I to obtain gypsum slurry.

[0043] Wherein, the consumption of each substance is:

[0044]

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Abstract

The invention discloses a gypsum slurry as well as a preparation method and application thereof. The gypsum slurry comprises gypsum, modified starch, sodium sulfate, a sulfo- modified polycarboxylatewater reducer, a foaming agent and water. The gypsum slurry has the advantages that the water consumption is small when the standard consistency is reached, the setting time of gypsum is not influenced, the gypsum board production efficiency is improved, and the gypsum board drying time is shortened.

Description

technical field [0001] The invention relates to a gypsum slurry and its preparation method and application. Background technique [0002] Paper-faced gypsum board is a new type of building material made of building gypsum as the main raw material. It has the characteristics of light weight, sound insulation, moisture absorption, and heat insulation. It has low shrinkage, high strength, and durability in building decoration. It can adjust indoor humidity and facilitate construction. Due to the advantages of energy saving, water saving, environmental protection, and easy transportation and storage, the paper-faced gypsum board conforms to the development trend of the building materials industry and has developed rapidly in recent years. [0003] At present, in the production of most gypsum boards, the quality of gypsum raw materials fluctuates, so that when the gypsum slurry reaches the standard consistency, the amount of mixing water is relatively high, which affects the set...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
CPCC04B28/144C04B2111/0062C04B24/38C04B22/147C04B2103/302C04B24/16C04B24/166
Inventor 范瑞波
Owner SHANXI SUNWAY INTION TRADE CO LTD
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