Anti-radiation concrete and its preparation method

A concrete and radiation protection technology, applied in the field of radiation protection building materials, can solve the problems of difficulty, aggregate sinking, poor workability, etc., and achieves the effect of satisfying bulk density, easy pouring and vibrating, and good construction performance

Active Publication Date: 2022-03-22
CHINA 19TH METALLURGICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

201810286242.X patent radiation-proof concrete bulk density meets 3400kg / m 3 The above is more difficult, and the strength cannot reach above C30, so aggregates with reasonable density and crushing value must be used
[0004] The greater the aggregate density of radiation-proof concrete, the easier it is for the aggregate to sink, and the workability is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Weigh 385Kg of cement, 1355Kg of barite sand, 1600Kg of barite crushed stone, 60Kg of 30*0.5mm shear wave steel fiber, 6.8Kg of water reducing agent, 155Kg of water, and weigh barite sand and barite crushed stone After fully mixing, add steel fiber, polycarboxylate superplasticizer and water, and stir for 100s to obtain concrete slurry, and observe that the slump of the concrete slurry is 180mm; transport the concrete slurry to the site by tanker, and reduce the loading by half; transport After arriving at the site, use the crane to place the concrete directly for construction, and the time from mixing to pouring is within 30 minutes. After the construction is completed and the final setting is completed, the film covering maintenance is adopted in time. After the curing time is 7 days, the effect is good, the concrete has no cracks, and the on-site bulk density spot check is 3580kg / m 3 , 28d intensity reaches 44.8Mpa.

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Abstract

The invention relates to radiation-proof concrete, which belongs to the technical field of radiation-proof building materials. The anti-radiation concrete of the present invention is prepared from the following raw materials: 360-380 parts by weight of cement, 1355-1420 parts by weight of barite sand; 1600-1640 parts by weight of barite gravel; 50-60 parts by weight of steel fiber; 6.4-6.8 parts by weight of agent; 155-160 parts by weight of water. The anti-radiation concrete of the present invention does not need to add fly ash, has good workability, can satisfy engineering structure construction, and has good engineering mechanics and integrity; the bulk density reaches 3500kg / m 3 Above, and the strength can meet more than C30, and the radiation resistance meets the design requirements. The invention can avoid structural cracks and ensure the radiation protection performance of the structure. The construction performance is good, it is easy to pour and vibrate, and the molding effect is of good quality.

Description

technical field [0001] The invention relates to radiation-proof concrete, which belongs to the technical field of radiation-proof building materials. Background technique [0002] Radiation-proof concrete, also known as shielding concrete and radiation-proof concrete, has a large bulk density, has shielding ability to γ-rays, X-rays or neutron radiation, and is not easily penetrated by radiation. It is mainly used for the protection of radioisotope equipment in industry, agriculture and scientific research departments. [0003] Traditional anti-radiation concrete is prepared by using ettringite as aggregate, or combining bentonite with water to prepare anti-radiation concrete under the synergistic effect of zirconia, silica and magnetite. 201810286242.X patent radiation-proof concrete bulk density meets 3400kg / m 3 The above is more difficult, and the strength cannot reach above C30, so aggregates with reasonable density and crushing value must be used. [0004] The greate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00258C04B2111/00862C04B2201/20C04B2201/50C04B14/368C04B14/48C04B2103/302
Inventor 贾建兵
Owner CHINA 19TH METALLURGICAL CORP
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