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Air-cooled non-active steel slag gypsum-based self-leveling mortar and preparation method thereof

A self-leveling mortar and non-active technology, which is applied in the field of preparation of gypsum-based self-leveling mortar, can solve the problems of low compressive strength of self-leveling mortar, cannot be used in high-strength occasions, insufficient heat preservation and energy saving, and achieves a simple and convenient preparation method , Solve the effect of easy empty drum cracking and less equipment

Inactive Publication Date: 2020-12-29
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an air-cooled inactive steel slag gypsum-based self-leveling mortar and its preparation method, which can effectively solve the problem of low compressive strength of the existing self-leveling mortar, which cannot be used in high-strength occasions, easy hollowing, cracking, and insufficient heat preservation energy saving problem

Method used

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  • Air-cooled non-active steel slag gypsum-based self-leveling mortar and preparation method thereof
  • Air-cooled non-active steel slag gypsum-based self-leveling mortar and preparation method thereof
  • Air-cooled non-active steel slag gypsum-based self-leveling mortar and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] An air-cooled inactive steel slag gypsum-based self-leveling mortar, comprising the following components by weight:

[0034] 490 parts of β-hemihydrate gypsum powder, 310 parts of steel slag (particle size 0.8mm~1.25mm, anhydrous, bulk density 2412.8g / L), 67 parts of Portland cement (PⅡ52.5), 47 parts of fly ash , 20 parts of metakaolin, 66 parts of heavy calcium, 7 parts of VAE redispersible latex powder, 4 parts of defoamer, 16 parts of water glass (mass concentration is 35%, modulus is 1.3), ZJ-G18 gypsum retarder 0.84 parts, 0.7 parts of polycarboxylate high-performance water reducer (ZJ-8300 type), 269 parts of water.

[0035] Preparation method of air-cooled inactive steel slag gypsum-based self-leveling mortar:

[0036]β-hemihydrate gypsum powder, Portland cement, fly ash, metakaolin, heavy calcium, VAE redispersible latex powder, defoamer, water glass, ZJ-G18 gypsum retarder, polycarboxylic acid high performance Put the water reducing agent into the mortar mix...

Embodiment 2

[0038] An air-cooled inactive steel slag gypsum-based self-leveling mortar, comprising the following components by weight:

[0039] 510 parts of β-hemihydrate gypsum powder, 290 parts of steel slag (particle size 0.8mm~1.25mm, anhydrous, bulk density 2412.8g / L), 83 parts of Portland cement (PⅡ52.5), 40 parts of fly ash , 18 parts of metakaolin, 58 parts of heavy calcium, 7 parts of VAE redispersible latex powder, 4 parts of defoamer, 15 parts of water glass (mass concentration is 35%, modulus is 1.3), ZJ-G18 gypsum retarder 0.84 parts, 0.7 parts of polycarboxylate high-performance water reducer (ZJ-8300 type), 276 parts of water.

[0040] Preparation method of air-cooled inactive steel slag gypsum-based self-leveling mortar:

[0041] β-hemihydrate gypsum powder, Portland cement, fly ash, metakaolin, heavy calcium, VAE redispersible latex powder, defoamer, water glass, ZJ-G18 gypsum retarder, polycarboxylic acid high performance Put the water reducing agent into the mortar mi...

Embodiment 3

[0043] An air-cooled inactive steel slag gypsum-based self-leveling mortar, comprising the following components by weight:

[0044] 500 parts of α-hemihydrate gypsum powder, 300 parts of steel slag (particle size 0.8mm~1.25mm, anhydrous, bulk density 2412.8g / L), 75 parts of Portland cement (PⅡ52.5), 52 parts of fly ash , 30 parts of metakaolin, 50 parts of heavy calcium, 7 parts of VAE redispersible latex powder, 4 parts of defoamer, 18 parts of water glass (mass concentration is 35%, modulus is 1.3), ZJ-G18 gypsum retarder 0.84 parts, 0.7 parts of polycarboxylate high-performance water reducer (ZJ-8300 type), 270 parts of water.

[0045] Preparation method of steel slag gypsum self-leveling mortar:

[0046] α-hemihydrate gypsum powder, Portland cement, fly ash, metakaolin, heavy calcium, VAE redispersible latex powder, defoamer, water glass, ZJ-G18 gypsum retarder, polycarboxylic acid high performance Put the water reducing agent into the mortar mixer, mix and stir for 2 to...

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Abstract

The invention relates to air-cooled non-active steel slag gypsum-based self-leveling mortar which comprises the following components in parts by mass: 480-530 parts of gypsum powder, 270-320 parts ofsteel slag, 50-100 parts of cement, 30-70 parts of fly ash, 10-30 parts of metakaolin, 50-100 parts of ground calcium carbonate, 5-9 parts of latex powder, 3-7 parts of defoaming agent, 10-20 parts ofwater glass, 0.5-1 part of gypsum retarder, 0.5-1 part of water reducer and 260-280 parts of water. The preparation method comprises the following steps: mixing the gypsum powder, the cement, the flyash, the metakaolin, the ground calcium carbonate, the latex powder, the defoaming agent, the water glass, the gypsum retarder and the water reducer, stirring the mixture for 2-5 minutes at the rotating speed of 60-70r / min, then adding the steel slag and the water, and continuously mixing and stirring for 2-5 minutes at the rotating speed of 120-130r / min to obtain the air-cooled non-active steelslag gypsum-based self-leveling mortar. According to the technical scheme, the problems that existing self-leveling mortar is low in compressive strength, incapable of being used in high-strength occasions, prone to hollowing and cracking and insufficient in heat preservation and energy conservation can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of gypsum-based self-leveling mortar, in particular to a gypsum-based self-leveling mortar prepared by replacing river sand with air-cooled inactive steel slag and a preparation method of the gypsum-based self-leveling mortar. Background technique [0002] my country is a big country of industrial by-product gypsum. Due to the complex composition of industrial by-product gypsum and the limitation of resource utilization technology, the comprehensive utilization rate of industrial by-product gypsum is only 48%. my country's industrial by-product gypsum utilization technology model is still mainly based on the production of β-type hemihydrate gypsum powder by physical methods. Due to the limitations of market capacity and product sales radius, it is difficult to achieve large-scale consumption of industrial by-product gypsum. Most of the industrial by-product gypsum is long-term stockpiling. With the rapid dev...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/62C04B2201/50C04B22/142C04B18/142C04B18/08C04B14/106C04B14/28C04B12/04C04B2103/22C04B2103/302C04B2103/50C04B2103/0057
Inventor 李东旭廖大龙贺诚韩超
Owner NANJING UNIV OF TECH
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