Concrete with electromagnetic wave radiation protection function and preparation method thereof

A technology of radiation protection, electromagnetic waves, applied in the field of building materials

Active Publication Date: 2015-05-20
福建省盛威建设发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, since it is difficult for a single material to meet the requirements of electromagnetic radiation protection, multiple materials must be compounded in various forms to obtain the best effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] First prepare graphene oxide nanopowder:

[0069] In 120 L of concentrated sulfuric acid at 3-4°C, add 10Kg of 220-mesh natural flake graphite, and control the temperature at 3-4°C and stir for 6 hours, then add 4.5Kg of phosphorus pentoxide and 5Kg of potassium persulfate at the same time, and raise the temperature to 22 After stirring for 10 h at -24°C, raise the temperature to 50-52°C and continue stirring for 56 h; then slowly add 500 L of water within 1 h and stir for 4 h, then slowly add 26 L of hydrogen peroxide within 2 h, and continue stirring for 12 h. A suspension of bright yellow particles was obtained; the bright yellow particles were filtered out and washed with water, then vacuum-dried at 70°C for 32 h to obtain 8.3 Kg of graphene oxide nanopowder.

[0070] Then prepare nano-ZnO / graphene oxide composite absorbing material:

[0071] (1) Take 5Kg NaHCO 3 , with 9.55Kg ZnSO 4 ·7H 2 O mixed evenly, and then the mixture was ball milled for 1.5 h for later us...

Embodiment 2

[0117] First prepare graphene oxide nanopowder, and its preparation steps are the same as in Example 1.

[0118] Then prepare nano-ZnO / graphene oxide composite absorbing material:

[0119] (1) Take 2Kg NaHCO 3 , with 3.82Kg ZnSO 4 ·7H 2 O mixed evenly, and then the mixture was ball milled for 1.5 h for later use.

[0120] (2) Take the ball-milled mixture in the above step (1), wash it with water, and dry it in vacuum at 70°C for 18 h before use.

[0121] (3) Treat the powder prepared in the above step (2) in an air atmosphere at 220°C for 2 h, then place it at room temperature for use.

[0122] (4) After mixing the powder prepared in the above step (3) with 0.4Kg graphene oxide evenly, use a high-energy ball mill to mill the mixture for 150 h to obtain 5.9Kg nano-ZnO / graphene oxide composite wave-absorbing material, wherein The average particle size of ZnO is 15 nm.

[0123] Preparation of nano-Fe 3 o 4 / Graphene oxide composite absorbing material:

[0124] (1) Accor...

Embodiment 3

[0139] First prepare graphene oxide nanopowder, and its preparation steps are the same as in Example 1.

[0140] Then prepare nano-ZnO / graphene oxide composite absorbing material:

[0141] (1) Take 10Kg NaHCO 3 , with 19.1Kg ZnSO 4 ·7H 2 O mixed evenly, and then the mixture was ball milled for 1.5 h for later use.

[0142] (2) Take the ball-milled mixture in the above step (1), wash it with water, and dry it in vacuum at 70°C for 18 h before use.

[0143] (3) Treat the powder prepared in the above step (2) in an air atmosphere at 220°C for 2 h, then place it at room temperature for use.

[0144] (4) After mixing the powder prepared in the above step (3) with 2Kg graphene oxide evenly, use a high-energy ball mill to mill the mixture for 150 h to obtain 29.3Kg nanometer ZnO / graphene oxide composite wave-absorbing material, in which ZnO The average particle size is 32 nm.

[0145] Preparation of nano-Fe 3 o 4 / Graphene oxide composite absorbing material:

[0146] (1) Ac...

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PUM

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Abstract

The invention relates to concrete with an electromagnetic wave radiation protection function and a preparation method of the concrete, and belongs to the field of construction materials. The concrete consists of water, dielectric loss type nano-composite wave-absorbing materials, magnetic loss type nano-composite wave-absorbing materials, a wave-absorbing base material, slag powder, cement, coal ash, fine aggregates, macadam and water reducing agents, and is prepared by mixing, stirring and pouring all components step by step. The concrete provided by the invention has high wide frequency wave-absorbing performance in 2-18 GHz, the bandwidth of less than -7dB optimally reaches 14.3 GHz and the bandwidth of less than -10dB reaches 10.6 GHz, and the concrete can be applied to electromagnetic wave of adjacent buildings such as radars, microwave base stations, high-power wireless communication launchers and the like, functional buildings in which a large quantity of precise electronic instruments are placed, critical buildings like national defense and administrative departments. The concrete has high scientific and technological contents, is high in innovativeness and wide in application prospect.

Description

technical field [0001] The invention relates to concrete with electromagnetic wave radiation protection function and a preparation method of the concrete, belonging to the field of building materials. Background technique [0002] At present, as the fourth largest global environmental problem after water pollution, air pollution and noise pollution, the harm of electromagnetic wave radiation is becoming more and more serious. Correspondingly, the electromagnetic wave radiation protection of various building facilities is also increasingly important. Especially the buildings adjacent to radars, microwave base stations, high-power wireless communication transmitters, etc., the functional buildings of scientific research institutes, hospitals, banks and other units with a large number of sophisticated electronic instruments inside, and the national defense and administrative buildings closely related to national security. The key building of the department, its electromagnetic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B28/04C04B18/12C01B31/04C01G49/08C01G9/02
CPCY02W30/91
Inventor 欧国原欧清峰毛祥华蒋国平
Owner 福建省盛威建设发展有限公司
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