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Nuclear power sacrificial concrete prepared from basalt fibers and preparation method

A technology of basalt fiber and sacrificial concrete, which is applied in the field of building materials, can solve the problems of poor crack resistance and high temperature performance, incomplete application, and low hematite grade, and achieve the effect of improving high temperature resistance and crack resistance

Inactive Publication Date: 2013-06-05
SOUTHEAST UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the above requirements are all based on foreign raw materials, considering that the grade of hematite in my country is not high, and the locality is quite different from that of foreign countries, this makes it difficult to obtain foreign sacrificial concrete preparation technology and is not fully applicable to the third-generation nuclear power plant under construction in my country.
[0004] At present, some nuclear power sacrificial concrete projects use PP fiber to improve the crack resistance of concrete, but the crack resistance and high temperature performance of sacrificial concrete and PP fiber reinforced sacrificial concrete are poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The weight content of each component of the concrete of the present invention is: 3 parts of basalt fibers, 350 parts of cementitious materials, 980 parts of hematite, 1300 parts of siliceous pebbles, 160 parts of water, and 6 parts of admixtures.

[0028] The monofilament diameter of the basalt fiber is 7um, the length is 2cm, the fiber working temperature is 690°, and the bonding temperature is 1000°.

[0029] The cementitious material includes cement and mineral admixtures.

[0030] The weight ratio of the cementitious material components is: cement 90%, mineral admixture 10%.

[0031] The cement used is the cement with the strength of P.I.42.5.

[0032] Said mineral admixture adopts Class I fly ash.

[0033] Fe in the hematite 2 O 3 The content is 91%, CO 2 The content of source material is 2%, the content of mud and mud blocks is 1.9%, and the particle size is 0.125-8mm.

[0034] SiO in the siliceous pebbles 2 The content is 84%, and the content of mud and m...

Embodiment 2

[0042] The weight content of each component of the concrete of the present invention is: 5 parts of basalt fibers, 400 parts of cementitious materials, 1050 parts of hematite, 1150 parts of siliceous pebbles, 165 parts of water, and 5 parts of admixtures.

[0043] The monofilament diameter of the basalt fiber is 7um, the length is 3cm, the fiber working temperature is 650°, and the bonding temperature is 1050°.

[0044] The cementitious material includes cement and mineral admixtures.

[0045] The weight ratio of the cementitious material components is: cement 75%, mineral admixture 25%.

[0046] Said cement adopts cement whose strength is P.II.42.5.

[0047] The mineral admixture is S95 grade mineral powder.

[0048] Fe in the hematite 2 O 3 The content is 85%, CO 2 The content of source material is 1.5%, the content of mud and mud blocks is 1%, and the particle size is 0.125-8mm.

[0049] SiO in the siliceous pebbles 2 The content is 95%, and the content of mud and mu...

Embodiment 3

[0056] The weight content of each component of the concrete of the present invention is: 3-6 parts of basalt fibers, 450 parts of cementitious materials, 1150 parts of hematite, 1100 parts of siliceous pebbles, 175 parts of water and 5 parts of admixtures.

[0057] The monofilament diameter of the basalt fiber is 15um, the length is 4cm, the fiber working temperature is 600°, and the bonding temperature is 1100°.

[0058] The cementitious material includes cement.

[0059] Said cement adopts the cement whose strength is P.I.52.5 or P.II.52.5.

[0060] Said mineral admixture adopts Class I fly ash.

[0061] Fe in the hematite 2 O 3 The content is 80%, CO 2 The content of source material is 1%, the content of mud and mud blocks is 0.5%, and the particle size is 8mm.

[0062] SiO in the siliceous pebbles 2 The content is 97%, and the content of mud and mud blocks is 1%. The admixture is a polycarboxylate water-reducing agent, and its water-reducing rate is 50%.

[0063] T...

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Abstract

The invention relates to building materials, in particular to a nuclear power sacrificial concrete and a preparation method for the concrete. The nuclear power sacrificial concrete prepared from basalt fibers comprises the following components in part by weight: 3 to 6 parts of basalt fiber, 350 to 500 parts of cementing material, 980 to 1,150 parts of hematite, 1,100 to 1,300 parts of silicon pebble, 160 to 175 parts of water and 4 to 6 parts of admixture. In the nuclear power sacrificial concrete and the preparation method for the concrete, the problems of cracking, high temperature resistance and the like of the nuclear power sacrificial concrete are taken into account, the characteristics of high melting point and inorganic fibers of the basalt fibers are fully utilized, and the high temperature resistance and cracking resistance of the nuclear power sacrificial concrete are improved by a mixing proportion optimization design.

Description

technical field [0001] The invention relates to a building material, in particular to a nuclear power sacrificial concrete and a preparation method of the concrete. Background technique [0002] With my country's low-carbon economy and sustainable development, reducing the proportion of thermal power and vigorously developing nuclear power to meet power demand, optimize energy structure, and ensure energy security has become the consensus of the government and all sectors of society. Currently, there are two third-generation nuclear power plants in the world—EPR-type nuclear power plants under construction, but none of them are in service yet. Sacrificial concrete for nuclear power plants, as an important material for third-generation nuclear power plants (EPR), can not only prevent instantaneous thermal loads on the steel structure of the core trap during the diffusion process, but also reduce the temperature of the melt and reduce The density of oxides, reducing the radia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21F1/04C04B28/04C04B14/38
Inventor 孙伟张巧芬蒋金洋金祖权李政
Owner SOUTHEAST UNIV