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Composite alkali-activating low-carbon cement and preparation method of low-carbon cement

A technology of alkali excitation and carbon cement, which is applied in the field of building materials, can solve the problems of environmental pollution, consumption of large limestone and clay, and large consumption of energy and resources, and achieve the effect of changing dust pollution

Inactive Publication Date: 2012-07-25
CHINA RAILWAY NO 9 GRP ENG TESTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Portland cement itself still has the disadvantages of high energy and resource consumption and environmental pollution.
The preparation of traditional silicate cementitious materials has gone through the process of two grindings and one burning, which consumes a lot of fuel and electric energy, and also consumes a lot of limestone and clay. released a large amount of CO 2 Gas that causes Earth's greenhouse effect

Method used

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  • Composite alkali-activating low-carbon cement and preparation method of low-carbon cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] a. The slag and fly ash are mixed with a mass ratio of 4:6, wherein 10% of alkali activator is mixed, 5% of lime coagulation agent is mixed, and 3% of natural zeolite is mixed as nucleating agent to control the whole The water-binder ratio of the system is 0.38, that is, the sample is prepared. Wherein the preparation of the alkali activator is: the ratio of water glass and sodium hydroxide having a modulus of 1.2 is 3:7.

[0017] b. Referring to the rapid determination method of cement sulfate corrosion resistance, the prepared samples were cured under standard conditions for 1 day and removed from the mold, placed in a standard curing room for 6 days, and then divided into two groups, one group was cured in 20°C water, and the other One group was soaked in the acidic medium with pH=3 for 28 days, and the flexural strength was measured and the corrosion resistance coefficient was calculated.

[0018] c. The determination of the drying shrinkage value of the mortar is ...

Embodiment 2

[0021] The slag and fly ash are mixed in a mass ratio of 4:6, 10% of alkali activator, 5% of lime coagulant, and 4% of natural zeolite are mixed in as nucleating agent to control the The water-binder ratio is 0.36, that is, the sample is prepared. Wherein the preparation of alkali activator is: the ratio of water glass and sodium hydroxide with a modulus of 1.2 is 4:6. All the other steps are the same as b, c, d in embodiment 1.

Embodiment 3

[0023]Mix slag and fly ash at a mass ratio of 6:4, add 10% of alkali activator, 5% of lime coagulant, and 3% of natural zeolite as nucleating agent to control the The water-binder ratio is 0.38, that is, the sample is prepared. Wherein the preparation of alkali activator is: the ratio of water glass and sodium hydroxide with a modulus of 1.2 is 4:6. All the other steps are the same as b, c, d in embodiment 1.

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Abstract

The invention discloses composite alkali-activating low-carbon cement and a preparation method of the low-carbon cement, and belongs to the field of construction materials. According to the invention, fly ash and slag are taken as raw materials, sodium hydroxide and water glass are taken as alkali-activating agents, natural zeolite is taken as a nucleating agent and lime is taken as an adjustable solidification agent, and the low-carbon cement has good performance in a measurement system. The low-carbon cement is produced by mixing industrial solid wastes such as slag and fly ash, the alkali-activating agents, the nucleating agent and the adjustable solidification agent based on a certain proportion. The low-carbon cement and the preparation method have the advantages that the raw materials are not needed to exploit or char, the preparation process is simple, the energy consumption is low, the cost is low, the market is wide, the situations that in the production process of the traditional cement a lot of dust is generated and the carbon dioxide emission amount is large are fundamentally changed, and the industrial solid wastes can be fully used, so that the cement is a real clean and environment-friendly construction material, and a binding material with the most development potential in the twenty-first century.

Description

technical field [0001] The invention belongs to the field of building materials, and relates to a composite type prepared by using fly ash and slag as raw materials, sodium hydroxide and water glass as alkali activators, natural zeolite as nucleating agent, and lime as coagulation regulator. Alkali-activated low-carbon emission cement and preparation method thereof. Background technique [0002] Portland cement is a widely used material in construction engineering and is one of the most widely used artificial materials by humans. However, Portland cement itself still has the disadvantages of high energy and resource consumption and environmental pollution. The preparation of traditional silicate cementitious materials has gone through the process of two grindings and one burning, which consumes a lot of fuel and electric energy, and also consumes a lot of limestone and clay. released a large amount of CO 2 Gases that cause the Earth's greenhouse effect. Therefore, in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08
Inventor 王淑英王艳伟孙宇杨元奎王军罗超梁迪
Owner CHINA RAILWAY NO 9 GRP ENG TESTING CO LTD
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