Cement based carbon dioxide curing agent and preparation method thereof

A technology of carbon dioxide and curing agent, applied in the field of material science and engineering, to achieve the effect of reducing environmental pollution, effective absorption, and broad application prospects

Inactive Publication Date: 2015-09-09
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although in recent years, with the joint efforts of relevant government departments, industry associations and cement enterprises, efforts to curb overcapacity in the cement industry have shown initial results, the industry is still under great pressure to resolve overcapacity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The proportion of a cement-based carbon dioxide curing agent is: 43.8% of ground slag, 12.5% ​​of cement, 40.9% of water (which is the total amount of water in the proportion), 1.0% of foaming agent, 1.25% of desulfurized gypsum, and 0.55% of MgO. The percentages are mass fractions, the same below.

[0018] The preparation method is as follows: step 1, mix 43.8% of finely ground slag, 12.5% ​​of cement, 1.25% of desulfurized gypsum, 0.55% of MgO powder and 30.9% of water (30.9% is mixing water) in proportion to form cement slurry.

[0019] Step 2, use compressed air under the condition of set pressure of 0.3-0.4MPa to blow the foaming agent solution (the foaming agent solution is composed of 1.0% foaming agent and 10% water, wherein 10% water is water for dilution of liquid foaming agent amount, the percentage is the mass ratio of the cement-based carbon dioxide curing agent) and compressed air are mixed in the mixing chamber, and then injected into the previously mixed...

Embodiment 2

[0023] The proportion of a cement-based carbon dioxide curing agent is: 33.3% ground slag, 26.7% cement, 35.2% water, 0.8% foaming agent, 2.6% desulfurized gypsum, and 1.4% MgO. The preparation method is the same as in Example 1.

[0024] In this embodiment, 100 prepared carbon dioxide curing agents are placed in a carbonization test chamber with a carbon dioxide concentration of 25% and a humidity of 70%. After 7 days, the carbon dioxide concentration in the carbonization test chamber decreases by 14.3%, and after 14 days, the carbon dioxide concentration decreases by 35.8%. %.

Embodiment 3

[0026] The proportion of a cement-based carbon dioxide curing agent is: 38.2% ground slag, 14.7% cement, 42.9% water, 1.8% foaming agent, 1.8% desulfurized gypsum, and 0.6% MgO. The preparation method is the same as above.

[0027] In this embodiment, 100 prepared carbon dioxide curing agents are placed in a carbonization test chamber with a carbon dioxide concentration of 25% and a humidity of 70%. After 7 days, the carbon dioxide concentration in the carbonization test chamber decreases by 17.9%, and after 28 days, the carbon dioxide concentration decreases by 62.3%. %.

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PUM

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Abstract

The invention relates to a cement based carbon dioxide curing agent and a preparation method thereof. The curing agent comprises, by mass, including ground granulated blast furnace slag, cement, water, foaming agent, gypsum, MgO, the mass ratio is: 29.4%-46.7% of ground slag powder, 11.8%-26.7% of cement, 34.9%-44.1% of water, 0.8%-1.8% of a foaming agent, 1.2%-3.3% of desulfurized gypsum, and 0.5%-2.7% of MgO. The cement based carbon dioxide curing agent provided by the invention plays a very important role in implementing the sustainable development strategy, saving energy and utilizing waste, and protecting environment, and has broad prospects.

Description

technical field [0001] The invention belongs to the field of material science and engineering, and in particular relates to a cement-based carbon dioxide curing agent and a preparation method thereof. Background technique [0002] The combustion of large-scale fossil fuels and bio-energy in industrial production will emit a large amount of carbon dioxide into the atmosphere, which will lead to the destruction of climate balance. In order to reduce the impact of carbon dioxide on the atmosphere, various carbon dioxide sequestration technologies are currently adopted. Ocean storage can inject carbon dioxide into the water column or the seabed, but it will reduce the pH value of seawater and affect the growth of deep-sea organisms. At the same time, in the long run, the carbon dioxide stored in the ocean will slowly escape from the water surface and return to the atmosphere; geological storage can Carbon dioxide is sealed in the deep underground, but it will destroy the mine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B38/02C04B18/12C04B22/14
CPCY02W30/91
Inventor 蒋林华游渌棽徐怡储洪强张研
Owner HOHAI UNIV
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