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Anti-radiation C40 concrete used for prefabricated part and preparation method of anti-radiation C40 concrete

A prefabricated component and concrete technology, which is applied in the field of construction concrete, can solve the problems of high cost of anti-cracking performance and poor shielding effect of large-volume concrete, and achieve the effects of reducing waste of raw materials and energy, improving product quality, and preventing shrinkage cracks

Inactive Publication Date: 2019-05-21
安徽海龙建筑工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Anti-radiation concrete with barite and iron ore as aggregates has poor shielding effect on proton rays and neutron rays and is not suitable for this project
The cost of adding steel fibers to improve the crack resistance of mass concrete is too high

Method used

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  • Anti-radiation C40 concrete used for prefabricated part and preparation method of anti-radiation C40 concrete
  • Anti-radiation C40 concrete used for prefabricated part and preparation method of anti-radiation C40 concrete
  • Anti-radiation C40 concrete used for prefabricated part and preparation method of anti-radiation C40 concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of anti-radiation C40 concrete for prefabricated components, the concrete is made by mixing cement, fly ash, river sand, gravel, admixture, expansion agent and water, and the dosage of each component is: 280 parts of cement , 120 parts of fly ash, 1170 parts of gravel, 720 parts of river sand, 152 parts of water, 9.5 parts of admixture, and 30 parts of expansion agent.

[0029] The dry density of the concrete is 2350kg / m 3 , the initial slump of concrete is 200mm, and the expansion is greater than 550mm.

[0030] All contain Co, Ag, Ir, Eu, Sm, Gd, Dy and Tm in the described cement and fly ash, the content of Co, Ag, Ir in the described cement and fly ash is 50ppm, the described The contents of Eu, Sm, Gd, Dy and Tm in the cement and fly ash are all 10ppm.

[0031] The fineness modulus of the river sand is 2.3-2.7.

[0032] The crushed stones are basalt crushed stones with a particle size of 25mm.

[0033] The admixture is retarded polycarboxylate superplasti...

Embodiment 2

[0043] A kind of anti-radiation C40 concrete for prefabricated components. The concrete is made by mixing cement, fly ash, river sand, gravel, admixture, expansion agent and water. According to parts by weight, the dosage of each component is: 245 parts of cement , 165 parts of fly ash, 1170 parts of gravel, 720 parts of river sand, 152 parts of water, 8.5 parts of admixture, and 30 parts of expansion agent.

[0044] The dry density of the concrete is 2350kg / m 3 , the initial slump of concrete is 200mm, and the expansion is greater than 550mm.

[0045] All contain Co, Ag, Ir, Eu, Sm, Gd, Dy and Tm in the described cement and fly ash, the content of Co, Ag, Ir in the described cement and fly ash is 50ppm, the described The contents of Eu, Sm, Gd, Dy and Tm in the cement and fly ash are all 10ppm.

[0046] The fineness modulus of the river sand is 2.3-2.7.

[0047] The crushed stones are basalt crushed stones with a particle size of 25mm.

[0048] The admixture is retarded pol...

Embodiment 3

[0058] A kind of anti-radiation C40 concrete for prefabricated components. The concrete is made by mixing cement, fly ash, river sand, gravel, admixture, expansion agent and water. According to parts by weight, the dosage of each component is: 205 parts of cement , 205 parts of fly ash, 1170 parts of gravel, 720 parts of river sand, 152 parts of water, 7.4 parts of admixture, and 30 parts of expansion agent.

[0059] The dry density of the concrete is 2350kg / m 3 , the initial slump of concrete is 200mm, and the expansion is greater than 550mm.

[0060] All contain Co, Ag, Ir, Eu, Sm, Gd, Dy and Tm in the described cement and fly ash, the content of Co, Ag, Ir in the described cement and fly ash is 50ppm, the described The contents of Eu, Sm, Gd, Dy and Tm in the cement and fly ash are all 10ppm.

[0061] The fineness modulus of the river sand is 2.3-2.7.

[0062] The crushed stones are basalt crushed stones with a particle size of 25mm.

[0063] The admixture is retarded p...

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Abstract

The invention discloses anti-radiation C40 concrete used for a prefabricated part. The concrete is prepared by mixing the following ingredients in parts by weight: 200-300 parts of cement, 120-210 parts of coal ash, 700-750 parts of river sand, 1,100-1,200 parts of gravels, 7-10 parts of an additive, 20-40 parts of an expanding agent and 140-160 parts of water. Compared with the prior art, the anti-radiation C40 concrete has the following advantages: 1, basalt is taken as an aggregate, and the performance density of the concrete is ensured to be 2,350kg / m<3> through optimization of a match ratio, so that the anti-radiation C40 concrete has the performance of shielding proton rays and neutron rays, and the strength of the concrete reaches the C40 grade; 2, the quantity of induced radioactivity of a concrete shield wall is controlled by strictly controlling the content of harmful elements in raw materials of the concrete; 3, by mixing a large amount of admixtures, solid wastes are utilized, the cost is lowered, and the hydration heat and pre-cracking of the concrete can be greatly reduced; 4, by adding the high-performance expanding agent, the shrinkage of the concrete is compensated, the cracking caused by shrinkage is prevented, and the radiation shield effect is intensified.

Description

technical field [0001] The invention relates to the technical field of construction engineering concrete, in particular to a radiation-proof C40 concrete for prefabricated components and a preparation method thereof. Background technique [0002] After the completion of the proton therapy project of Hefei Ion Medicine Center, it will become my country's first public platform for superconducting cyclotron proton therapy. Proton therapy technology, as a kind of radiotherapy technology, can reduce the damage to healthy tissues while blasting tumors in a concentrated manner, so as to maximize the curative effect. Due to the high radioactivity of the treatment equipment, the project had extremely high requirements on the radiation shielding performance and crack control of the concrete. In addition, when the equipment is in operation, it will activate the radiation shielding wall and produce induced radiation. Therefore, the content of harmful elements in the concrete raw materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
Inventor 张宗军唐云刚王铁柱李洋王伟光
Owner 安徽海龙建筑工业有限公司
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