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Alkali-activated cement utilizing abandoned clay brick powder and preparation method thereof

A technology for alkali-activated cement and waste clay bricks, applied in the field of cement preparation, can solve the problems of high carbon emission and high energy consumption, and achieve the effects of reducing the burden on the environment, reducing huge pressure, and achieving good economic and social benefits.

Active Publication Date: 2016-03-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, Portland cement not only consumes high energy, but also its production process is a high-carbon emission process. The production of 1 ton of cement will emit about 1 ton of greenhouse gases

Method used

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  • Alkali-activated cement utilizing abandoned clay brick powder and preparation method thereof
  • Alkali-activated cement utilizing abandoned clay brick powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The percentage of used raw material is as follows: waste brick powder: dosage 20%; High-calcium fly ash: dosage 80%; (the sum of waste brick powder and high-calcium fly ash quality is 100%)

[0034] Compound chemical admixture modulus: 1.5; compound chemical admixture dosage (external mixing): 10%;

[0035] Water-solid ratio: 0.30;

[0036] Mix waste clay brick powder with a mass percentage of 20% and high-calcium fly ash with a mass percentage of 80%, and add a composite chemical admixture accounting for 10% of the mass of waste clay brick powder and high-calcium fly ash; the system water The solid ratio is 0.30, and the water includes two parts: the water contained in the sodium water glass solution and the added water, that is, the water-solid ratio of the control system is 0.30, except for the water contained in the sodium water glass solution. Complementing; mixing, molding, demoulding, wet curing to the age determination, and testing the performance of the alkali...

Embodiment 2

[0039] The percentage of used raw material is as follows: waste brick powder: dosage 30%; High-calcium fly ash: dosage 70%; (the sum of waste brick powder and high-calcium fly ash quality is 100%)

[0040]Compound chemical admixture modulus: 1.5; compound chemical admixture dosage (external mixing): 10%;

[0041] Water-solid ratio: 0.28;

[0042] Mix waste clay brick powder with a mass percentage of 30% and high-calcium fly ash with a mass percentage of 70%, and add a composite chemical admixture accounting for 10% of the mass of waste clay brick powder and high-calcium fly ash; system water The solid ratio is 0.28, and the water in it consists of two parts: the water contained in the sodium water glass solution and the added water. Complementing; mixing, molding, demoulding, wet curing to the age determination, and testing the performance of the alkali-activated cement.

[0043] Wherein: the composite chemical admixture is made by mixing sodium water glass and sodium hydrox...

Embodiment 3

[0045] The percentage of used raw material is as follows: waste brick powder: dosage 30%; High-calcium fly ash: dosage 70%; (the sum of waste brick powder and high-calcium fly ash quality is 100%)

[0046] Compound chemical admixture modulus: 1.5; compound chemical admixture dosage (external mixing): 10%;

[0047] Water-solid ratio: 0.30.

[0048] Mix waste clay brick powder with a mass percentage of 30% and high-calcium fly ash with a mass percentage of 70%, and add a composite chemical admixture accounting for 10% of the mass of waste clay brick powder and high-calcium fly ash; system water The solid ratio is 0.30, and the water includes two parts: the water contained in the sodium water glass solution and the added water, that is, the water-solid ratio of the control system is 0.30, except for the water contained in the sodium water glass solution. Complementing; mixing, molding, demoulding, wet curing to the age determination, and testing the performance of the alkali-act...

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Abstract

The invention discloses alkali-activated cement. The alkali-activated cement comprises a basic component and a compound chemical additive, wherein the basic component is prepared from the following components by mass percent: 10-30% of abandoned clay brick powder and 70-90% of high-calcium fly ash, and amount of added compound chemical additive accounts for 10-15% of the mass of the basic component metered by content of introduced Na2O. The invention also discloses a preparation method of the alkali-activated cement. The preparation method of the alkali-activated cement comprises the following steps: mixing the abandoned clay brick powder with the mass percentage of 10-30% with the high-calcium fly ash with the mass percentage of 70-90%, adding the compound chemical additive accounting for 10-15% of the sum of the mass of the abandoned clay brick powder and high-calcium fly ash, controlling water-solid ratio of a system to be 0.28-0.32, and mixing, so that the alkali-activated cement is obtained. The alkali-activated cement disclosed by the invention has the beneficial effects that industrial waste, namely the high-calcium fly ash and the abandoned clay brick powder, are utilized, an approach is provided for utilization of the waste, and cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of cement preparation, and relates to an alkali-activated cement and a preparation method thereof. Background technique [0002] Cement is a traditional cementitious material that has made great contributions to human economic development and social progress. However, the shortage of Portland cement raw materials has become a very urgent practical problem that the world must face. run out. In addition, Portland cement not only consumes high energy, but also its production process is a high-carbon emission process. The production of 1 ton of cement will emit about 1 ton of greenhouse gases. Therefore, various countries have introduced corresponding measures to limit the development of the cement industry. At the same time, due to the urgent needs of national economic construction, countries have also successively developed new green cementitious materials to replace this traditional cementitious material cem...

Claims

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Application Information

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IPC IPC(8): C04B12/00
CPCC04B12/005
Inventor 郭晓潞施惠生
Owner TONGJI UNIV
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