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Concrete slurry containing magnesium and its preparation process and application thereof

A technology for concrete and slurry, applied in the field of building materials, can solve problems such as pollution of the environment, and achieve the effect of reducing the burden on the environment and reducing the hidden danger of water pollution.

Inactive Publication Date: 2008-12-24
何金星 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the past two decades, with the development of my country's industry, a large amount of industrial waste has been produced. For example, the solid waste phosphogypsum discharged by phosphate fertilizer and phosphoric acid chemical enterprises in my country exceeds 20 million tons every year. Because phosphogypsum contains organic phosphorus, Inorganic phosphorus, sulfide, and fluoride, if they are discharged indiscriminately without control, will not only occupy a large amount of land and form slag mountains, but also seriously pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The light-burned magnesia that adopts active magnesia content to be 60% is raw material, according to the weight ratio=5:1:14 of active magnesia:magnesium chloride:water, above-mentioned three kinds of raw materials are put into twin-shaft mixer, carry out thorough mixing, stirring process Eddy currents and dead angles should be avoided in the process to prevent the presence of raw materials. Then add phosphogypsum powder according to 1% of the weight of light-burned magnesia as the raw material, and stir for 1 to 2 minutes. Then add calcined rice husk ash according to 1% of the weight of raw material lightly burned magnesia, and can also add chopped medium-alkaline glass fiber reinforcement material as required, and can also add sawdust, expanded perlite, Polystyrene particles, etc., and then add water reducing agent sodium methylene bis-naphthalene sulfonate (NNO) according to 2‰ of the weight of light-burned magnesia as the raw material, and mix thoroughly to make ma...

Embodiment 2

[0018] The light-burned magnesia that adopts active magnesia content to be 50% is raw material, according to the weight ratio=7:1:15 of active magnesia: magnesium chloride: water, above-mentioned three kinds of raw materials are put into the biaxial mixer, fully mix, then according to Add phosphogypsum powder to 25% of the weight of raw material light-burned magnesia, stir evenly, and then add 15% of fly ash; into magnesia concrete slurry.

[0019] Adjust the design thickness of the vertical casting mold of the lightweight foam partition wall strip to 100mm, and then pour the above-mentioned magnesia concrete slurry into the forming mold. After the partition wall strips are formed on the mold, they enter the hardening process, which is hardened at room temperature. The general hardening time is 24 hours after demoulding, and then cured at room temperature for 28 days.

Embodiment 3

[0021] The light-burned magnesia that adopts active magnesia content to be 58% is raw material, according to the weight ratio=8:1:17 of active magnesia: magnesium chloride: water, above-mentioned three kinds of raw materials are put into twin-shaft mixer, carry out thorough mixing, then according to 40% of the weight of the light-burned magnesia weight of the raw material was added into straw calcined ash, stirred evenly, and then 1‰ of the weight of light-burned magnesia was added phosphoric acid; a rosin foaming agent was introduced, and then chopped medium-alkaline glass fiber reinforcement was added to fully Mix and stir evenly to make magnesia concrete slurry.

[0022] Adjust the design thickness of the vertical casting mold of the lightweight foamed partition wall slat to 120 mm, and then pour the above-mentioned magnesia concrete slurry into the forming mold. After the partition wall slats are formed on the mold, they enter the hardening process. The ambient temperature...

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Abstract

A magnesium concrete is composed of the magnesium cement grout prepared from light burnt magnesium oxide, magnesium chloride and water and the modifying filler composed of the phosphogypsum and / or the ash of rice husk, rice straw and wheat straw. It has low cost.

Description

technical field [0001] The invention relates to a building material, in particular to a magnesia concrete slurry and its preparation method and application. Background technique [0002] Magnesia cement was invented by French scientist Sorel in 1867, so it is also called Sorel cement (Sorel cement), and it is customarily called magnesium oxychloride cement, magnesia cement or oxychloride cement. It is made of light-burned magnesium oxide (MgO), magnesium chloride (MgCl 2 ), water (H 2 O) As a basic raw material, the air-hardening material formed by adding modifiers at the same time has the characteristics of high strength, good surface gloss, light weight, sound insulation, heat insulation, and easy processing and molding. The material of magnesia cement is mainly composed of two parts, one part is the basic material, which refers to the light-burned magnesia, magnesium chloride, and water that make up the phase three or five crystals of magnesia cement. One part is addit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/30C04B18/24C04B14/36
CPCY02W30/91
Inventor 迟广俊何金星
Owner 何金星
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