Concrete admixture for hydroelectric engineering and its application

A technology for hydropower engineering and admixtures, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as affecting construction progress, high cost, and lack of fly ash resources.

Inactive Publication Date: 2007-07-18
HUANENG LANCANG RIVER HYDROPOWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, sometimes the fly ash resource is very scarce, and the fly ash used in the project needs to be transported from other places. Long-distance transportation is not only expensive, but also may affect the construction progress due to temporary road blockage.

Method used

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  • Concrete admixture for hydroelectric engineering and its application
  • Concrete admixture for hydroelectric engineering and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] The ground slag powder is electric furnace granulated phosphorus slag, and the admixture is obtained by mixing the ground limestone powder and the ground slag powder at a ratio of 7:3 (mass ratio).

[0008] Application: Mix the admixture in a certain amount in the dam roller compacted concrete or the dam normal concrete. In the dam roller compacted concrete, the amount of the admixture is 70% of the total amount of concrete cementitious materials. In concrete, the amount of admixture is 30% of the total amount of concrete cementitious materials. The mixed concrete can meet the relevant technical requirements for concrete admixtures of roller compacted concrete dams, and can also meet the relevant technical requirements for concrete admixtures of most concrete used in hydropower projects (including normal concrete for dams and workshops, etc.) Require.

Embodiment 2

[0010] The ground slag powder is steel slag, and the admixture is obtained by mixing the ground limestone powder and the ground slag powder in a ratio of 4:6 (mass ratio).

[0011] Application: Mix the admixture in a certain amount in the dam roller compacted concrete or the dam normal concrete. In the dam roller compacted concrete, the amount of the admixture is 40% of the total amount of concrete cementitious materials. In concrete, the amount of admixture is 40% of the total amount of concrete cementitious materials. The mixed concrete can meet the relevant technical requirements for concrete admixtures of roller compacted concrete dams, and can also meet the relevant technical requirements for concrete admixtures of most concrete used in hydropower projects (including normal concrete for dams and workshops, etc.) Require.

Embodiment 3

[0013] The ground slag powder is water-quenched ferromanganese slag, and the admixture is obtained by mixing the ground limestone powder and the ground slag powder at a ratio of 5:5 (mass ratio).

[0014] Application: Mix the admixture in a certain amount in the dam roller compacted concrete or the dam normal concrete. In the dam roller compacted concrete, the amount of the admixture is 60% of the total amount of concrete cementitious materials. In concrete, the amount of admixture is 30% of the total amount of concrete cementitious materials. The mixed concrete can meet the relevant technical requirements for concrete admixtures of roller compacted concrete dams, and can also meet the relevant technical requirements for concrete admixtures of most concrete used in hydropower projects (including normal concrete for dams and workshops, etc.) Require.

[0015] The above-mentioned limestone powder is ground from limestone that can be used as dam concrete aggregate, and the finen...

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Abstract

This invention relates to a hydropower project used concrete admixture and its applications. The mixture mixed by grinding slag powder and grinding limestone powder, with the ratio of 4:6 to 7:3. Under the project design requirements to adjust the ratio of limestone powder, can gain varying activity of concrete admixture. With 30% to 70% of the amount used, not to increase consumption of concrete and can reduce concrete shrinkage. Iron (Fe-Mn) Slag from steel smelting industrial waste, sources is rich, is conducive to environmental protection; Using this invention, hydropower construction can make full use of the geographical situation to produce admixture, can reduce the long-distance transport of fly ash, economic benefits and reduce the adverse effects of supply and transportation of fly ash.

Description

technical field [0001] The invention relates to a concrete admixture, in particular to an admixture which can replace fly ash and be used as concrete for hydropower projects and its application. Background technique [0002] Since the first roller compacted concrete dam was built in my country in 1986, the roller compacted concrete dam technology has been rapidly developed and applied in my country. So far, more than 40 RCC dams have been built in my country, and more than ten are under construction. The special construction technology of RCC dam technology determines that the dam RCC can adopt the mix ratio of low cement content and high admixture content. Among the completed RCC dams, except for the RCC dam of the Dachaoshan Hydropower Station, which used PT admixture (mixed in equal proportions from ground phosphorus slag and ground tuff powder), other RCC dams All adopted the scheme of low cement consumption and high fly ash content. But sometimes the fly ash resource...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/12C04B14/28
CPCC04B40/0042Y02W30/91C04B14/28C04B18/142C04B28/02C04B18/14
Inventor 马洪琪甄永严张宗亮谢力明戴益华陈改新刘金堂唐芸殷洁
Owner HUANENG LANCANG RIVER HYDROPOWER
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