High-strength magnesian coal ash clinker-free cement

A technology without clinker cement and fly ash, which is applied in the field of concrete building materials to achieve the effects of high strength, reduced environmental pollution and stable structure

Active Publication Date: 2012-10-03
湖北兆驰新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-strength magnesia fly ash clinker-free cement for the existing fly ash clinker-free cement which is only equivalent to 42.5-62.5 strength grade cement and needs steam curing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0016] Example: Production of non-combustible inorganic composite panels

[0017] Stir 100Kg of low-calcium fly ash, 40kg of lightly burned magnesia, 3Kg of gypsum, 15Kg of magnesium sulfate heptahydrate dissolved in 75Kg of water, 1Kg of ferrous sulfate, and 0.8kg of phosphoric acid to form magnesia fly ash clinker-free cement Clean the pulp, and then put in the debonded chopped plant fibers (such as sawdust, straw), and stir to form a slurry. Through the rolling equipment, the fiberglass cloth and the slurry are laid to form a slab. The slab is kept in a curing room at 37°C for 12 hours, and after natural curing for 9 days, it is trimmed and trimmed to become a non-combustible inorganic composite board.

[0018] The principle of the present invention is to use magnesium oxide as an alkaline activator and composite sulfates such as magnesium sulfate as a sulphate activator to act together on fly ash to generate magnesium silicate hydrate and sulfoaluminic acid hydrate in the...

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PUM

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Abstract

The invention relates to high-strength magnesian coal ash clinker-free cement, which comprises the following raw materials in part by weight: 100 parts of coal ash, 30 to 40 parts of light roasting magnesium oxide, 10 to 15 parts of magnesium sulfate heptahydrate, 2 to 4 parts of calcium sulfate, ferrous sulfate or aluminum sulfate, 0.5 to 1.0 part of phosphoric acid and 50 to 100 parts of water. The high-strength magnesian coal ash clinker-free cement has the advantages that a large amount of coal ash is utilized, and produced wastes are used as production raw materials and are put into use, so that environmental pollution is reduced; and the product is long in service life and high in board strength, and is widely applied to wallboards, suspended ceilings, decorative materials and furniture.

Description

technical field [0001] The invention relates to the field of concrete building material products. Background technique [0002] The existing fly ash clinker-free cement mainly uses lime (calcium oxide) as an alkaline activator and gypsum (calcium sulfate) as a sulfate activator to act on fly ash, and is produced in a hydration reaction. Inorganic gelling material. For example, my country's invention patents "94111221", "96118276" and so on. This kind of fly ash clinker-free cement is only equivalent to 42.5-62.5 strength grade cement, and it needs steam curing. Contents of the invention [0003] The purpose of the present invention is to provide a high-strength magnesia fly ash clinker-free cement for the existing fly ash clinker-free cement which is only equivalent to 42.5-62.5 strength grade cement and needs steam curing. [0004] Raw material weight portion proportioning of the present invention is: [0005] 100 parts of fly ash 30-40 parts of light-burned magnesium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B9/04
Inventor 徐军
Owner 湖北兆驰新材料有限公司
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