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Neutron irradiation preventing low-hydration-heat barite concrete

A technology for preventing neutron radiation and low heat of hydration, applied in the field of concrete, can solve the problems of inability to prevent neutron radiation, difficult-to-protect structure, and high heat of hydration, and achieve a good effect of preventing neutron radiation.

Active Publication Date: 2015-04-22
GUANGDONG PROVINCIAL ARCHITECTURAL ENG MACHINERY CONSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Concrete in the prior art is generally not resistant to neutron radiation, and the higher its strength, the higher the heat of hydration, which is prone to cracks and is difficult to use in large-volume protective structures

Method used

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  • Neutron irradiation preventing low-hydration-heat barite concrete
  • Neutron irradiation preventing low-hydration-heat barite concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of anti-neutron radiation barite concrete with low heat of hydration, including water, P·O42.5R cement, S95 grade granulated blast furnace slag powder, boron glass powder with a particle size of 320#, iron ore, iron sand, heavy spar, barite sand, polypropylene fiber, polycarboxylate water reducing agent, wherein barite, barite sand, iron ore, iron sand are aggregates; wherein, the water content of the iron ore is between Between 2.1% and 21.2%, the apparent density is 3104kg / m 3 , the mud content is 19.64%, the mud content is 9.9%, and the fineness modulus is 1.29; the apparent density of the iron sand is 7460kg / m 3 , the fineness modulus is 3.15; the apparent density of the barite sand is 4303kg / m 3 , the mud content is 2.78%, the mud content is 1.5%, and the fineness modulus is 4.58; the barite is 5-25mm continuous gradation, and the apparent density is 4137kg / m 3 , the mud content is 0.27%, the mud content is 0.2%, the needle flake particles are 0%, and the ...

Embodiment 2

[0024] The material that present embodiment adopts is similar to embodiment 1, difference is: described water, cement, slag powder, boron glass powder, iron ore, iron sand, barite, barite sand, polypropylene fiber, polycarboxylic acid The component contents of the superplasticizer are: water 163.8kg / m 3 , cement 250kg / m 3 , slag powder 90kg / m 3 , boron glass powder 10kg / m 3 , iron ore 900kg / m 3 , iron sand 350kg / m 3 , Barite 1558kg / m 3 , barite sand 330kg / m 3 , polypropylene fiber 0.9kg / m 3 , Polycarboxylate water reducer 16.32kg / m 3 ; Among them, the thickness gradation of the aggregate conforms to the attached figure 1 Requirements shown in Table 1.

[0025] The apparent density of the low heat of hydration barite concrete of the present embodiment to prevent neutron radiation is 3669.02kg / m 3 , (R28) strength is 43.6MPa, retained crystal water is 113kg / m 3 , can achieve a better anti-neutron radiation effect; when used in a mass concrete structure with a minimum ...

Embodiment 3

[0027] The material that present embodiment adopts is similar to embodiment 1, difference is: described water, cement, slag powder, boron glass powder, iron ore, iron sand, barite, barite sand, polypropylene fiber, polycarboxylic acid The component contents of the superplasticizer are: water 163.8kg / m 3 , cement 280kg / m 3 , slag powder 90kg / m 3 , boron glass powder 10kg / m 3 , iron ore 850kg / m 3 , iron sand 350kg / m 3 , Barite 1600kg / m 3 , barite sand 300kg / m 3 , polypropylene fiber 0.9kg / m 3 , polycarboxylate water reducer 18.5kg / m 3 ; Among them, the thickness gradation of the aggregate conforms to the attached figure 1 Requirements shown in Table 1.

[0028] The apparent density of the low-heat-of-hydration barite concrete against neutron radiation in this embodiment is 3663.2kg / m 3 , (R28) strength is 44.2MPa, retained crystal water is 112kg / m 3 , can achieve a better anti-neutron radiation effect; when used in a mass concrete structure with a minimum geometric si...

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Abstract

The invention relates to the technical field of concrete, and particularly relates to neutron irradiation preventing low-hydration-heat barite concrete. The neutron irradiation preventing low-hydration-heat barite concrete comprises the following components in content: 163.8-168kg / m<3> of water, 200-280kg / m<3> of cement, 90-140kg / m<3> of slag powder, 9.5-10.5kg / m<3> of boron glass powder, 850-900kg / m<3>of iron ore sand, 340-360kg / m<3> of iron sand, 1558-1600kg / m<3> of barite, 300-330kg / m<3> of barite sand, 0.85-0.95kg / m<3> of polypropylene fiber and 4% to 7% of a polycarboxylate-type water reducing agent. The neutron irradiation preventing low-hydration-heat barite concrete disclosed by the invention is larger than 3600kg / m<3> in apparent density, larger than 110kg / m<3> in retained crystal water and good in neutron irradiation prevention effect; when being applied to a large-size concrete structure of which the minimum geometric dimension is larger than 1.2m, the neutron irradiation preventing low-hydration-heat barite concrete is low in hydration heat, the internal and external temperature difference is smaller than or equal to 20 DEG C, the adiabatic temperature rise is smaller than or equal to 55 DEG C, and the neutron irradiation preventing low-hydration-heat barite concrete is applicable to a large-size radiation-proof structure. The concrete can reach relatively high requirements in aspects such as retained crystal water, fluidity, cohesiveness and water retention property and has the advantages of guaranteeing the strength and the compactness and controlling the hydration heat.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a barite concrete with low heat of hydration for preventing neutron radiation. Background technique [0002] Due to the special nature of neutrons, neutron detection devices have become an indispensable weapon for scientists. However, neutrons have strong penetrating ability, and their radiation hazards are great. In order to shield neutron radiation, it is necessary to prepare anti-neutron radiation heavy concrete . Concrete in the prior art is generally not resistant to neutron radiation, and the higher its strength, the higher the heat of hydration, which is prone to cracks and difficult to be used in large-volume protective structures. Contents of the invention [0003] In order to overcome at least one defect described in the above-mentioned prior art, the present invention provides a barite concrete with low heat of hydration for preventing neutron radiation. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/30C04B16/06
CPCY02W30/91
Inventor 黄健袁斌李宏亮何成勇谢木俊何志勇梁文雄黄秋筠
Owner GUANGDONG PROVINCIAL ARCHITECTURAL ENG MACHINERY CONSTR
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