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Preparation method of weakly-alkaline activated carbide slag-high-calcium ash composite cementing material

A composite cementitious material and a technology for the cementitious material are applied in the field of preparation of a weakly alkali-excited carbide slag-high calcium ash composite cementitious material, which can solve the problems of high cost, negative impact, aggravation of the greenhouse effect, and the like, and achieve cost saving, The effect of reducing carbon dioxide emissions

Inactive Publication Date: 2020-12-22
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, the production of cement has many negative effects
First, the process consumes energy
Secondly, every ton of cement produced will release 900kg of carbon dioxide into the atmosphere, which intensifies the greenhouse effect
Third, cement production also produces chemically active dust, which negatively impacts the surrounding environment
However, the patent uses clay as the main material and is expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) dry-mill the massive carbide slag with a ball mill for 30 minutes to obtain carbide slag powder, with a median particle size of 34.4 μm;

[0031] (2) Put the high-calcium ash in the wet ball mill according to the water-to-material ratio of 0.5:1, and then add 0.1 parts by mass of triisopropanolamine, 0.1 parts by mass of triethanolamine, and 0.5 parts by mass of powdery naphthalene-based water reducer. / min speed wet milling for 10 minutes to obtain high calcium ash slurry;

[0032] (3) Take step (1) 180 parts of carbide slag powder, step (2) 405 parts of high-calcium ash slurry, 180 parts of carbide slag, 23 parts of sodium carbonate, and 45 parts of water, and stir evenly to obtain weak alkali-activated carbide slag-high calcium Ash composite cementitious material;

[0033] (4) Pack the cementitious material into a mold coated with a release agent, pound it evenly, put it on a vibrating table and vibrate until the surface of the cementitious material is pulped an...

Embodiment 2

[0037] (1) dry-mill the massive carbide slag with a ball mill for 30 minutes to obtain carbide slag powder, with a median particle size of 34.4 μm;

[0038] (2) Put the high-calcium ash in the wet ball mill according to the water-to-material ratio of 0.5:1, then add 0.15 parts by mass of triisopropanolamine, 0.15 parts by mass of triethanolamine, and 0.75 parts by mass of powdery naphthalene-based water reducer. / min speed wet milling for 10 minutes to obtain high calcium ash slurry;

[0039] (3) Take step (1) 135 parts of carbide slag powder, step (2) 473 parts of high-calcium ash slurry, 135 parts of carbide slag, 27 parts of sodium carbonate, and 23 parts of water, and stir evenly to obtain weak base-activated carbide slag-high calcium Ash composite cementitious material;

[0040] (4) Pack the cementitious material into a mold coated with a release agent, pound it evenly, put it on a vibrating table and vibrate until the surface of the cementitious material is pulped and s...

Embodiment 3

[0044] (1) dry-mill the massive carbide slag with a ball mill for 30 minutes to obtain carbide slag powder, with a median particle size of 34.4 μm;

[0045] (2) Put the high-calcium ash in the wet ball mill according to the water-to-material ratio of 0.5:1, and then add 0.1 parts by mass of triisopropanolamine, 0.1 parts by mass of triethanolamine, and 0.5 parts by mass of powdery naphthalene-based water reducer. / min speed wet milling for 10 minutes to obtain high calcium ash slurry;

[0046] (3) Take step (1) 180 parts of carbide slag powder, step (2) 405 parts of high-calcium ash slurry, 180 parts of carbide slag, 31 parts of sodium sulfate, and 45 parts of water, and stir evenly to obtain weak alkali-activated carbide slag-high calcium Ash composite cementitious material;

[0047] (4) Pack the cementitious material into a mold coated with a release agent, pound it evenly, put it on a vibrating table and vibrate until the surface of the cementitious material is pulped and ...

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Abstract

The invention provides a preparation method of a weakly-alkaline activated carbide slag-high-calcium ash composite cementing material. The preparation method comprises the following steps: adding 0.1-0.15 part by mass of triisopropanolamine, 0.1-0.15 part by mass of triethanolamine and 0.5-0.75 part by mass of powdery naphthalene water reducer into high-calcium ash according to the water-materialratio of 0.5: 1, and carrying out wet grinding to obtain high-calcium mortar with the median particle size of 1-5 mu m; mixing and stirring 405-473 parts of high-calcium mortar, 135-180 parts of carbide slag, 23-27 parts of sodium carbonate or 31-36 parts of sodium sulfate and 23-45 parts of water to be uniform, and preparing the weakly-alkaline activated carbide slag-high-calcium ash composite cementing material. Calcium-silicon-aluminum solid waste carbide slag and high-calcium ash are used as raw materials, and the carbide slag can react with fly ash to generate hydrated calcium silicate and hydrated calcium aluminosilicate. Sodium carbonate or sodium sulfate is doped as an excitant to excite the activity of the cementing material, the preparation operation process is simple, and the application prospect is good.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a preparation method of a weak alkali activated carbide slag-high calcium ash composite gelling material. Background technique [0002] Carbide slag is another industrial by-product, but can be used instead of cement. Calcium hydroxide (Ca(OH) 2 ) can react with pozzolanic materials to form gelling materials. With the development of the electric power industry, the discharge of fly ash from burning electric power is increasing year by year, and it has become one of the industrial wastes with the largest discharge in my country. Fly ash is also a kind of industrial solid waste. If a large amount of fly ash is not treated, it will generate dust and pollute the atmosphere; if it is discharged into the water system, it will cause river silting, and the toxic chemicals in it will also cause harm to humans and organisms. . Fly ash is rich in silica and alumin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/22
CPCC04B28/186C04B2201/50C04B18/0481C04B18/08C04B24/122C04B2103/302C04B22/002C04B22/10C04B22/147
Inventor 王迎斌王文娜范朦贺行洋苏英熊光李欣懋杨杰刘文志李阳江波
Owner HUBEI UNIV OF TECH
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