Concrete for nuclear power station

A technology for concrete and nuclear power plants, applied in the field of concrete for nuclear power plants and concrete, can solve the problems of high cost, achieve high elastic modulus, reduce delayed ettringite phenomenon, and improve quality and durability

Inactive Publication Date: 2013-04-17
CHINA NUCLEAR IND HUAXING CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In China, when the concrete strength is greater than C60, the amount of cement must be greater than 350kg / m in order to make the concrete have the advantages of both high-strength concrete and high-performance concrete 3 ,higher cost

Method used

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  • Concrete for nuclear power station
  • Concrete for nuclear power station
  • Concrete for nuclear power station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0036] (1) Comparative test

[0037] Select different admixtures to carry out comparative experiments, and the admixtures are selected as follows:

[0038] 1) pure cement;

[0039] 2) Single doped silicon powder;

[0040] 3) Double mixing (silicon powder and slag powder, silicon powder and fly ash);

[0041] The experimental data are shown in Table 1:

[0042]Table 1 Mixing ratio of comparative test

[0043]

[0044] A large number of mix ratio exploratory tests and raw material comparison tests were carried out for the above schemes with basically the same water-cement ratio. According to the test results, most of the strengths can meet the requirements. Comparative Example 1, the concrete is too sticky, the construction performance is poor, and the heat of hydration If it is too high, comparative example 2 has poor water retention and construction performance, and comparative example 3 has a higher heat of hydration. Considering comprehensive hydration heat, mix ratio...

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Abstract

The invention relates to concrete, in particular to concrete for a nuclear power station and belongs to the technical field of building construction. The concrete for the nuclear power station comprises the following components by mass percent: 8-30 percent of Portland cement, 1-20 percent of coal ash, 0.5-10 percent of silica powder, 35-55 percent of macadam, 20-40 percent of sand, 0.1-1 percent of polycarboxylic acid high-performance water-reducing and set-retarding admixture and 2-15 percent of water. The invention has the benefit that the prepared concrete consumes a small amount of cement, has high strength and high elastic modulus, achieves the characteristics of very strong durability and favorable workability through addition of silica powder and control of harmful ingredients, can reduce the phenomenon of delayed ettringite formation, has favorable pumping property and is suitable for mass concrete pumping construction.

Description

technical field [0001] The invention relates to concrete, in particular to concrete for nuclear power plants, and belongs to the technical field of building construction. Background technique [0002] High-strength concrete refers to concrete with a strength grade above C60. It has been widely used in the field of domestic civil construction. It is a new type of high-tech concrete. On the basis of greatly improving the performance of conventional concrete, it adopts modern concrete technology and selects high-quality Raw materials, made under proper quality control, have high compressive strength, enhanced deformation resistance, and reduced structural section size; small deformation of concrete, increased rigidity of components, and improved concrete deformation performance; good compactness of concrete, impermeability and The anti-freeze performance is better than that of ordinary concrete, which can improve the service life of the project; high-strength concrete provides ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B22/06C04B18/08
CPCY02W30/91
Inventor 王龙黄权沈益军方辉煌李军陶玉平余黄昏
Owner CHINA NUCLEAR IND HUAXING CONSTR
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