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Caulking desulphurization gypsum

A technology of desulfurized gypsum and regulator, applied in the field of caulking gypsum, can solve problems such as low strength and easy cracking, and achieve good anti-cracking performance

Active Publication Date: 2010-06-23
BEIJING NEW BUILDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason is that the use of desulfurized gypsum to prepare caulking gypsum has problems such as low strength and easy cracking.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The caulking desulfurization gypsum of this embodiment includes the following components: 0.1% regulator, 1% fly ash, 0.3% water retention agent, 0.01% adhesive, 0.1% reinforcing agent, and the balance is building desulfurization gypsum; wherein, the above Percentages are by weight.

[0014] The preparation process is as follows:

[0015] The building desulfurization gypsum powder is metered into the mixer, and at the same time, the fly ash and other admixtures with a particle size that can pass through the 80-mesh standard sieve are metered into the mixer. After mixing, they are packaged according to a certain weight.

[0016] The above-mentioned adjusting agent is sulfonate, the water retaining agent is methyl cellulose, sodium carboxymethyl cellulose or cellulose ether, the binder is rubber powder, and the retarder is citric acid.

[0017] After testing, the strength of the caulking desulfurization gypsum of this embodiment reaches 3.6 MPa, and its anti-cracking per...

Embodiment 2

[0019] The caulking desulfurization gypsum of this embodiment includes the following components: 8% regulator, 25% fly ash, 1% water retention agent, 0.2% adhesive, 2% reinforcing agent, and the balance is building desulfurization gypsum; wherein, the above Percentages are by weight.

[0020] The preparation process is the same as in Example 1.

[0021] The above-mentioned adjusting agent is sulfonate, the water retaining agent is methyl cellulose, sodium carboxymethyl cellulose or cellulose ether, the binder is rubber powder, and the retarder is citric acid.

[0022] After testing, the strength of the caulking desulfurization gypsum of this embodiment reaches 4.0 MPa, and its anti-cracking performance is tested according to the experimental requirements of ASTM C475 / C475M-02. The caulking desulfurization gypsum putty of the present invention has no cracks.

Embodiment 3

[0024] The caulking desulfurization gypsum of this embodiment includes the following components: 4% regulator, 13% fly ash, 0.7% water retaining agent, 0.1% adhesive, 1% reinforcing agent, and the balance is building desulfurization gypsum; wherein, the above Percentages are by weight.

[0025] The preparation process is the same as in Example 1.

[0026] The above-mentioned adjusting agent is sulfonate, the water retaining agent is methyl cellulose, sodium carboxymethyl cellulose or cellulose ether, the binder is rubber powder, and the retarder is citric acid.

[0027] After testing, the strength of the caulking desulfurization gypsum of this embodiment reaches 3.8 MPa, and its anti-cracking performance is tested according to the experimental requirements of ASTM C475 / C475M-02. The caulking desulfurization gypsum of the present invention has no cracks.

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Abstract

The invention discloses caulking desulfurization gypsum. The caulking desulfurization gypsum comprises the following components in percentage by weight: 0.1-8% of conditioning agent, 1-25% of pulverized fuel ash, 0.3-1% of water-retaining agent, 0.01-0.2% of adhesive agent, 0.01-0.5% of retarder and balance of construction desulfurization gypsum. In the invention, the caulking desulfurization gypsum is produced by making full use of two industrial solid wastes the desulfurization gypsum and the pulverized fuel ash of a fuel electric plant. Besides, the caulking desulfurization gypsum has higher intensity, and the maximum folding strength can reach 4.0 MPa, while the folding strength of the caulked joint of natural gypsum is generally in the range of 3.0-3.4 MPa. In addition, the caulking desulfurization gypsum has good cracking resistance and is detected according to the experimental requirements of ASTM C475 / C475M-02. The caulking desulfurization gypsum has no cracks in any form, while the caulked joint of the natural gypsum can generate some fine cracks within the index range generally.

Description

technical field [0001] The invention relates to a caulking gypsum. Background technique [0002] In recent years, with the development of my country's society and economy, air pollution has become increasingly serious, among which the emission of sulfur dioxide is one of the important factors causing air pollution. Relevant data show that the total emission of sulfur dioxide in my country in 2006 was 45 million tons, of which the total emission of sulfur dioxide in the thermal power industry exceeded 50% of the total emission. It is estimated that by 2020, the emission of sulfur dioxide will reach 9,000 tons. Lime-gypsum desulfurization solves the pollution problem of sulfur dioxide in the atmosphere, but also produces a large amount of industrial solid waste - desulfurization gypsum. [0003] The caulking gypsum is usually made of natural building gypsum, and there is no report on using desulfurized gypsum to prepare the caulking gypsum. The main reason is that the use of...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B18/08
CPCC04B28/144C04B2201/50C04B2111/00663C04B2111/343Y02W30/91C04B18/08C04B20/0076C04B24/06C04B24/16C04B24/24C04B24/383C04B2103/22C04B2103/46
Inventor 周梦文冯菊莲邓嫔李拓
Owner BEIJING NEW BUILDING MATERIAL
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