Method for producing gypsum building products by pressing process

A technology for gypsum and products, which is applied in the field of production of gypsum building products, which can solve the problems of low product strength, reduced product strength, and extended production cycle, and achieves the effects of low free moisture content, reduced production energy consumption, and fast production speed

Inactive Publication Date: 2010-02-17
方承仕
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Second, due to the addition of excessive water, a large number of pores are formed in the product, which reduces the compactness of the material and the strength of the product
[0007] Due to the addition of a large amount of water in the ingredients, the drying of

Method used

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Examples

Experimental program
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Example Embodiment

[0034] Example: Production of gypsum-fly ash bricks and blocks by pressing process

[0035] 1. Preparation of gypsum press material

[0036] The gypsum press material is prepared according to the following weight %:

[0037] 52% of building gypsum calcined with desulfurized gypsum as raw material;

[0038] Fly ash (Class II ash), 26%;

[0039] 0.5% of methyl cellulose;

[0040] Citric acid 0.5%;

[0041] 21% of mixed water;

[0042] 2. Compression molding:

[0043] 1. Weigh and mix building gypsum, fly ash, and methyl cellulose into a dry powder mixture;

[0044] 2. Weigh and dissolve citric acid in the mixing water to prepare a mixed aqueous solution;

[0045] 3. Add the mixed aqueous solution to the dry powder mixture and mix it evenly in a forced mixer into a semi-dry pressed material;

[0046] 4. Using an automatic hydraulic forming machine to press the pressed material into gypsum-fly ash bricks or blocks. Let it stand for 8 hours. The compressive strength of the product can reach more ...

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Abstract

The invention provides a process method for quickly producing gypsum building products with the advantages of water and energy conservation and top quality, particularly a method for producing gypsumbuilding products by pressing process. The method comprises the following steps: firstly, preparing building gypsum, packing powder, plasticizing agent, adjustable solidification agent, waterproof agent and mixing water into a gypsum pressing material; and pressing the gypsum pressing material into various building products inside dies of required size and shape by different types of pressure forming machines. The method for producing gypsum building products by pressing process has the outstanding advantages that: (1) product base material has very high intensity and the intensity of pressedcompact base material is 2 to 5 times that of cast base material, thereby showing excellent performance and development space for the application of gypsum products; (2) molded products have very lowfree moisture content and do not require baking or drying, thereby greatly reducing energy consumption during production; and (3) the method has quick production speed and short production cycle, thereby providing a quick process for producing gypsum building products.

Description

Technical field [0001] The present invention relates to a process for producing gypsum building products, in particular to a method for producing gypsum building products by pressing. Background technique [0002] With the implementation of major development guidelines such as saving resources, protecting the environment, and developing circular economy, due to the requirements for the development of ecological buildings and green building materials in construction projects, gypsum building materials with gypsum as the main body have attracted more and more attention from the construction industry. This is because : Gypsum is a recognized green building material: gypsum can be used as medicine, and it is also a food additive. Disposal is recyclable. The development of gypsum building materials can save energy consumption, reduce greenhouse gas emissions, and meet the requirements of energy conservation and emission reduction. [0003] my country has favorable conditions fo...

Claims

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Application Information

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IPC IPC(8): B28C7/04B28C1/04B28B3/00B28B1/52B28B11/24
Inventor 方承仕
Owner 方承仕
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