Magnesium oxysulfate cement foamed bricks and preparation method therefor

A technology of magnesium oxysulfate cement and foam bricks, which is applied in the field of construction products, can solve the problems of high energy consumption, inability to solve bulk density and strength, and failure to achieve low bulk density and high strength foaming, and achieve low density and good fire prevention effect , the effect of good thermal insulation performance

Inactive Publication Date: 2016-08-17
ZHONGJING ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the cement used in foam concrete is Portland cement. The "two grinding and one burning" process consumes a lot of energy. The foaming prepared by Portland cement foaming usually cannot solve the contradiction between bulk density and strength. That is, it is impossible to achieve low bulk density and high strength foaming
[0004] In view of the above problems, the invention patent CN103951337 discloses a low-density high-strength quick-setting foamed cement insulation board. In this invention, Portland cement is used as the gel material, and the dry density of the prepared foamed insulation board can reach 100~ 200kg / m 3 , but the compressive strength is only 0.3~1.0MPa

Method used

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  • Magnesium oxysulfate cement foamed bricks and preparation method therefor
  • Magnesium oxysulfate cement foamed bricks and preparation method therefor
  • Magnesium oxysulfate cement foamed bricks and preparation method therefor

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preparation example Construction

[0066] The present invention also relates to the preparation method of this magnesium oxysulfate cement foam brick, comprising the following steps:

[0067] Weigh the raw materials in proportion, mix and stir magnesium sulfate, magnesium oxide, additives and water, add fillers and continue stirring to obtain cement slurry, pour hydrogen peroxide into the cement slurry and stir, pour into the mold, let stand, and naturally maintain for 15 minutes. Demoulding, cutting and curing for 3 to 7 days to obtain magnesium oxysulfide foamed bricks.

[0068] Specifically: mix magnesium sulfate, magnesium oxide, additives and water and stir for 5-10 minutes; quickly pour hydrogen peroxide into the slurry at a stirring speed of 300-500 rpm. Stirring time 20s ~ 60s.

Embodiment 1

[0076] In this embodiment, fly ash is used as lightweight aggregate, and the proportioning ratio of each raw material is shown in Table 1-1 and 1-2:

[0077] Table 1-1: Raw material ratio

[0078] raw material

[0079] According to 1000 parts of the above-mentioned magnesium oxysulfide cement, add the admixtures shown in the weight parts of Table 1-2.

[0080] Table 1-2:

[0081]

[0082]

[0083] The preparation method steps are as follows:

[0084] Weigh each raw material according to the mass fraction in Table 1, dissolve magnesium sulfate in water, add various admixtures and stir evenly, add magnesium oxide, stir for 5Min, pour fly ash into and continue stirring to obtain a uniform cement slurry, add Quickly pour hydrogen peroxide into the slurry and stir quickly and evenly for 20 seconds, pour into the mold, let stand, and naturally cure for 15 minutes, demold, cut, and cure for 3 to 7 days to obtain low-density and high-strength magnesium oxysulfide foa...

Embodiment 2

[0089] In this embodiment, slag fine powder is used as lightweight aggregate, and the proportioning ratio of each raw material is shown in Table 3-1 and 3-2:

[0090] Table 3-1: Raw material ratio

[0091] raw material

parts by weight (kg)

MgO

300

MgSO 4

300

h 2 o

330

Slag fine powder

400

hydrogen peroxide

60

[0092] According to 1000 parts of the above-mentioned magnesium oxysulfide cement, add the admixture shown in Table 3-2 in parts by weight.

[0093] Table 3-2:

[0094] Admixture

parts by weight (kg)

WJ-A: phosphoric acid

5

WJ-B: Sodium lignosulfonate

5

WJ-C: sodium sulfate

10

WJ-D: Honey

5

WJ-E: Acrylamide

10

WJ-G: Hydroxypropyl methylcellulose

Vitamins

2

WJ-H: Silicone

2

[0095] The preparation method steps are as follows:

[0096] Weigh each raw material according to the mass fraction in Table 3, disso...

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Abstract

The invention relates to the field of building ware and particularly relates to magnesium oxysulfate cement foamed bricks and a preparation method therefor. The magnesium oxysulfate cement foamed bricks disclosed by the invention are prepared from the raw materials in parts by weight: 100 parts of magnesium sulfate, 50-200 parts of magnesia, 0-500 parts of filler and 30-350 parts of water, 8-50 parts of hydrogen peroxide and an admixture, wherein the addition level of the admixture is 0.1% to 5% the weight of magnesium oxysulfate cement. The magnesium oxysulfate cement foamed bricks disclosed by the invention are low in density, high in mechanical strength, small in coefficient of thermal conductivity, low in water absorption rate and good in humidity resistance and has a good fireproof effect. The preparation method for the magnesium oxysulfate cement foamed bricks disclosed by the invention is simple and is applicable to large-scale popularization and application.

Description

technical field [0001] The invention relates to the field of building products, in particular to a magnesium oxysulfide cement foam brick and a preparation method thereof. Background technique [0002] Faced with the country's total ban on the use of red bricks, that is, fired clay bricks, foam concrete blocks are widely used in various construction projects. The traditional production of solid clay bricks has always been in accordance with the production process of digging - mud - making bricks - firing. A piece of red brick requires land several times its volume to be used as raw material, and a large amount of soil is required to make it, which will inevitably occupy a large amount of arable land. And with the improvement of energy-saving requirements and environmental protection requirements for building materials in my country, the thermal insulation effect of the wall itself is also getting higher and higher. [0003] The production of non-steaming foam concrete bloc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/30C04B38/02B28B1/50
CPCC04B28/30B28B1/50C04B38/02C04B9/00C04B18/08C04B22/068C04B18/141
Inventor 童裳慧
Owner ZHONGJING ENVIRONMENTAL TECH CO LTD
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