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Magnesium cement foam material

A foam material and magnesium cement technology, applied in the field of inorganic thermal insulation materials, can solve problems such as being unsuitable for large-scale industrial production, affecting the thermal insulation performance of products, restricting ordinary magnesium cement, etc., and achieving the effects of reducing load bearing, light weight and strong toughness

Inactive Publication Date: 2011-06-22
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because ordinary magnesium cement materials have high strength, fire resistance, anti-corrosion and other properties, but the bulk density of ordinary magnesium cement is larger than other insulation materials, which restricts the development of ordinary magnesium cement as insulation materials, so it is used to add foaming agent to produce magnesium For cement foam materials, reducing its bulk density has become a trend, but the existing foaming technology has slow foaming speed and uneven foaming, which is not suitable for large-scale industrial production, and also affects the thermal insulation performance of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 A kind of magnesium cement foam material is mixed by 10% lightly burned magnesia powder, 89% inorganic filler fly ash and 1% composite foaming agent, with 100% mixing mass concentration of the total weight of the mixture It is 20% magnesium chloride solution; it can be obtained after stirring evenly and casting. The bulk density of the magnesium cement foam material is 450kg / m 3 , The 28-day compressive strength is 4.8MPa.

[0016] Wherein: light-burned magnesia powder refers to light-burned magnesia obtained by calcining magnesite at a temperature of 600° C. and having a magnesia content of 75% to 85%.

[0017] The compound foaming agent is made by mixing 90% sodium peroxide, 6% wetting agent alkyl sulfonate, and 4% foam stabilizer lauryl alcohol.

Embodiment 2

[0018] Embodiment 2 A kind of magnesium cement foam material is mixed by 90% lightly burned magnesia powder, 5% inorganic filler dolomite powder and 5% composite foaming agent, with 150% mixing mass concentration of the total weight of the mixture. 26% magnesium chloride solution; it can be obtained after stirring evenly and casting. The bulk density of the magnesium cement foam material is 900kg / m 3 , 28-day compressive strength of 10.0MPa.

[0019] Wherein: the lightly burned magnesia powder refers to the magnesia powder whose magnesia content is 75%-85% obtained by pyrolyzing salt lake bischofite.

[0020] The composite foaming agent is made by mixing 95% potassium peroxide, 1% wetting agent alkylbenzene sulfonate, and 4% foam stabilizer lauryl alcohol.

Embodiment 3

[0021] Embodiment 3 A kind of magnesium cement foam material mixes after 30% lightly burned magnesia powder, 60% inorganic filler calcium carbonate powder and 10% composite foaming agent, with 120% mixing mass concentration of mixture gross weight It is 21% magnesium chloride solution; it can be obtained after stirring evenly and casting. The bulk density of the magnesium cement foam material is 580kg / m 3 , The 28-day compressive strength is 5.2MPa.

[0022] Wherein: lightly calcined magnesia powder refers to magnesia powder obtained by semi-roasting dolomite with a magnesia content of 75% to 85%.

[0023] The compound foaming agent is made by mixing 91% hydrogen peroxide, 4% wetting agent alkyl sulfonate, and 5% foam stabilizer lauryl alcohol.

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Abstract

The invention relates to a magnesium cement foam material which is prepared by the following steps: mixing 10-90 wt% of light-burnt magnesium oxide powder, 5-89 wt% of filler and 0.8-10% of compound foaming agent, and mixing with a magnesium chloride solution which accounts for 100-150 wt% of the mixture; and evenly stirring, casting and forming to obtain the magnesium cement foam material. The invention can effectively lower the load of the buildings, has favorable thermal insulation property, and can be widely used for building blocks, heat engineering equipment, and various ventilating ducts and industrial ducts in industrial and civil buildings.

Description

technical field [0001] The invention relates to an inorganic thermal insulation material in the construction field, in particular to a magnesium cement foam material. Background technique [0002] Inorganic thermal insulation materials have the characteristics of high strength, good fire and flame retardant safety, good thermal performance, convenient construction, high stability, green environmental protection and pollution-free, etc., and are increasingly favored by customers. Because ordinary magnesium cement materials have high strength, fire resistance, anti-corrosion and other properties, but the bulk density of ordinary magnesium cement is larger than other insulation materials, which restricts the development of ordinary magnesium cement as insulation materials, so it is used to add foaming agent to produce magnesium For cement foam materials, reducing its bulk density has become a trend, but the existing foaming technology has slow foaming speed and uneven foaming, ...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/32
CPCC04B28/32Y02W30/91C04B14/28C04B14/365C04B18/08C04B38/10C04B40/0028C04B14/18C04B18/24C04B18/248C04B18/26
Inventor 都永生韩继龙李明珍肖学英周园孙庆国火焱
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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