Modified magnesium oxysulfate cement for foaming and foam material thereof

Abstract

The invention relates to the field of cement and particularly relates to modified magnesium oxysulfate cement and a foam material prepared by adopting the magnesium oxysulfate cement. The modified magnesium oxysulfate cement is 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, wherein an admixture may be added. The invention also relates to the foam material prepared by adopting the magnesium oxysulfate cement. According to the modified magnesium oxysulfate cement and the foam material thereof, by adding the admixture, the generation of magnesium hydroxide in the cement is inhibited, so that the mechanical properties and water resistance of the magnesium oxysulfate cement are effectively improved; and meanwhile, the magnesium oxysulfate cement has the characteristics of heat resistance and no cracking.

Description

technical field

[0001] The invention relates to the field of cement, in particular to a modified magnesium oxysulfide cement and a magnesium oxysulfide foaming material prepared by using the magnesium oxysulfide cement. Background technique

[0002] Energy saving and environmental protection are two eternal themes in the development of human society and technological progress. Calcareous cement adopts the "two grinding and one burning" process, which consumes a lot of energy. Magnesium cement is made of MgO powder and MgCl 2 or MgSO 4 Aqueous solution mixed to form, only MgO powder is made of MgCO 3 or Mg(OH) 2 After calcining, the other two magnesium salt solutions come from industrial by-products or industrial waste, so the energy consumption and resource consumption are low. Compared with Portland cement, the energy consumption of magnesia basic salt cement is much lower:

[0003] 1. Calcining energy consumption is low, Portland cement clinker needs to be fired at 145...

Examples

preparation example Construction

[0064] The preparation method of the magnesium oxysulfide cement for foaming of the present invention is as follows: firstly weigh each raw material according to the proportion, then add magnesium sulfate into water to completely dissolve it, add admixtures, magnesium oxide and filler, and stir evenly to form a slurry. ; The more fully the better the stirring, preferably stirring for 10 to 30 minutes, the reaction temperature is preferably 30 ° C.

[0065] The present invention also provides a composition containing the magnesium oxysulfate cement, such as foaming materials, wall materials, heat-retaining and flame-retardant materials, insulating materials, packaging materials, etc., which are prepared by using cheap raw materials and simple stirring equipment these products. The composition contains at least one of additive B or filler B.

[0066] The present invention also provides a magnesium oxysulfide cement foaming material, which contains the magnesium oxysulfide cemen...

Embodiment 1～7

[0100] Adopt Retch mill (model is KM-1), according to adding raw material, at first weigh each raw material in the weight part (kg) in Table 1, then add magnesium sulfate into water and make it dissolve completely, add admixture successively, magnesium oxide and filler, and carried out grinding / mixing operation for 20 minutes to prepare a viscous substance, which was put into a mold with a size of 40×40×160mm and left to stand at room temperature for 7 days (the curing condition was relative humidity 60%, temperature 15°C-30°C), to obtain modified magnesium sulfate cement. The cement formula is shown in Table 1.

[0101] Table 1: Cement formulations

[0102] cement formula

MgO

MgSO 4

h 2 o

Admixture A

Filler A

Example 1

300

300

300

Phosphate 3

Fly Ash, 400

Example 2

300

300

300

Phosphoric acid 4.5

Slag Powder, 400

Example 3

240

300

240

Phosphate 4

Micronized Slag, 300

...

Embodiment 8

[0117] A kind of foam cement, is made up of the raw material of following parts by weight (kg): 1000 parts by weight of the modified magnesium sulfate cement prepared in embodiment 3 and admixture B, adopts 40 parts by weight of hydrogen peroxide as foaming agent. The preparation method is the same as in Example 1. The concrete composition of admixture B is as shown in table 6:

[0118] Table 6: Admixture B formulation

[0119] Admixture

technical field

[0001] The invention relates to the field of cement, in particular to a modified magnesium oxysulfide cement and a magnesium oxysulfide foaming material prepared by using the magnesium oxysulfide cement. Background technique

[0002] Energy saving and environmental protection are two eternal themes in the development of human society and technological progress. Calcareous cement adopts the "two grinding and one burning" process, which consumes a lot of energy. Magnesium cement is made of MgO powder and MgCl 2 or MgSO 4 Aqueous solution mixed to form, only MgO powder is made of MgCO 3 or Mg(OH) 2 After calcining, the other two magnesium salt solutions come from industrial by-products or industrial waste, so the energy consumption and resource consumption are low. Compared with Portland cement, the energy consumption of magnesia basic salt cement is much lower:

[0003] 1. Calcining energy consumption is low, Portland cement clinker needs to be fired at 145...

Examples

preparation example Construction

[0064] The preparation method of the magnesium oxysulfide cement for foaming of the present invention is as follows: firstly weigh each raw material according to the proportion, then add magnesium sulfate into water to completely dissolve it, add admixtures, magnesium oxide and filler, and stir evenly to form a slurry. ; The more fully the better the stirring, preferably stirring for 10 to 30 minutes, the reaction temperature is preferably 30 ° C.

[0065] The present invention also provides a composition containing the magnesium oxysulfate cement, such as foaming materials, wall materials, heat-retaining and flame-retardant materials, insulating materials, packaging materials, etc., which are prepared by using cheap raw materials and simple stirring equipment these products. The composition contains at least one of additive B or filler B.

[0066] The present invention also provides a magnesium oxysulfide cement foaming material, which contains the magnesium oxysulfide cemen...

Embodiment 1～7

[0100] Adopt Retch mill (model is KM-1), according to adding raw material, at first weigh each raw material in the weight part (kg) in Table 1, then add magnesium sulfate into water and make it dissolve completely, add admixture successively, magnesium oxide and filler, and carried out grinding / mixing operation for 20 minutes to prepare a viscous substance, which was put into a mold with a size of 40×40×160mm and left to stand at room temperature for 7 days (the curing condition was relative humidity 60%, temperature 15°C-30°C), to obtain modified magnesium sulfate cement. The cement formula is shown in Table 1.

[0101] Table 1: Cement formulations

[0102] cement formula

MgO

MgSO 4

h 2 o

Admixture A

Filler A

Example 1

300

300

300

Phosphate 3

Fly Ash, 400

Example 2

300

300

300

Phosphoric acid 4.5

Slag Powder, 400

Example 3

240

300

240

Phosphate 4

Micronized Slag, 300

...

Embodiment 8

[0117] A kind of foam cement, is made up of the raw material of following parts by weight (kg): 1000 parts by weight of the modified magnesium sulfate cement prepared in embodiment 3 and admixture B, adopts 40 parts by weight of hydrogen peroxide as foaming agent. The preparation method is the same as in Example 1. The concrete composition of admixture B is as shown in table 6:

[0118] Table 6: Admixture B formulation

[0119] Admixture

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