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Magnesium sulphoaluminate cement

A magnesium sulfoaluminate and cement technology, which is applied to the field of magnesium cement formulation and its products, can solve the problems of low strength of magnesium oxysulfide cement, unsuitable heating and curing, long production cycle, etc., and achieves stable product structure, long service life, The effect of reducing environmental pollution

Inactive Publication Date: 2012-08-29
HUBEI ZHONGBAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing magnesium oxysulfide cement strength is too low, not suitable for making special structural parts
my country's invention patent "02133685.7" "Magnesium Aluminum Portland Cement and Fiber Reinforced Composite Material and Its Preparation Method" does not involve magnesium chloride in the reaction and overcomes the disadvantages of magnesium oxychloride cement, but in large-scale industrial production, it is not suitable to directly Heating maintenance, long production cycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0015] Example Production of inorganic glued non-wood plant fiber-based panels

[0016] After mixing 100kg of light-burned magnesia, 63kg of pozzolan materials containing 45% active aluminum oxide, 50kg of composite sulfate, 1.5kg of phosphoric acid, and 70kg of water (the water-soluble components in composite sulfate are first dissolved in water) Make a magnesium sulfoaluminate slurry, and then mix it with 500kg of dry cotton stalk; the mixed slurry is first spread and rolled, and then hot-pressed in a flat press to form an inorganic powder with a density of about 850kg / m3. The mechanical properties of glued non-wood plant fiber-based panels meet the requirements of organically glued medium-density fiberboards.

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PUM

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Abstract

The invention discloses magnesium sulphoaluminate cement, which is characterized by comprising the following raw materials in parts by weight: 90-110 parts of light burned magnesium oxide, 45-55 parts of composite sulfate, 25-30 parts of active aluminum sesquioxide, 30-35 parts of active silicon dioxide, 1.0-1.7 pats of phosphoric acid or phosphate and 65-75 parts of water. The magnesium sulphoaluminate cement has the advantages that: no magnesium chloride participates in reaction; and the defects of scumming, metal corrosion and the like of magnesium oxy-chloride cement are avoided. The magnesium sulphoaluminate cement comprises a pozzolanic material containing the active aluminum sesquioxide and the active silicon dioxide; and since the reaction of pozzolana and the structure of a resultant are stable, the service life of a product is long.

Description

technical field [0001] The invention relates to a ratio of magnesium sulfoaluminate cement and a method for preparing a fiber-reinforced composite material, and belongs to the technical field of magnesium cement formula and its products. Background technique [0002] The existing Portland cement has a high alkalinity, which causes alkaline corrosion to glass fibers, aging and brittleness to plant fibers, and cannot produce fiber cement products with long service life. Existing magnesium oxychloride cement is owing to have magnesium chloride to participate in the reaction, contains a large amount of chloride ions (Cl-) in the resultant, exists the disadvantages such as pan frosting and returning to halogen, corroded iron pieces, etc., thereby limited scope of application; Magnesium cement modified patents, such as: U.S2543959, U.S2702753, U.S2939799, etc., but did not change the properties of the thermodynamic metastable phase of magnesium oxychloride cement. When transformin...

Claims

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Application Information

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IPC IPC(8): C04B9/04
Inventor 徐军
Owner HUBEI ZHONGBAI TECH