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Preparation method of electromagnetic wave-transparent concrete

A concrete and wave-transmitting technology is applied in the field of electromagnetic wave-transmitting concrete preparation to achieve the effects of improving electromagnetic wave transmittance, increasing strength, and improving dielectric properties

Active Publication Date: 2021-12-07
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports on the preparation and research of wave-transparent concrete

Method used

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  • Preparation method of electromagnetic wave-transparent concrete
  • Preparation method of electromagnetic wave-transparent concrete

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0037] 1. The main components of concrete:

[0038] (1) The mass ratio of water to PO 42.5 ordinary Portland cement is 0.15;

[0039] (2) The mass ratio of PO 42.5 ordinary Portland cement to the main constituent materials of concrete is 15%;

[0040] (3) The mass ratio of fine aggregate to the main constituent materials of concrete is 33%;

[0041] (4) The mass ratio of composite coarse aggregate to the main constituent materials of concrete is 52%;

[0042] 2. Wave penetration enhancer

[0043] (1) The mass ratio of polycarboxylate water-reducing and PO.42.5 ordinary Portland cement is 0.5%;

[0044] (2) the mass ratio of sodium linear alkylbenzene sulfonate and PO.42.5 ordinary Portland cement is 1%;

[0045] (3) The mass ratio of aluminum dihydrogen phosphate and PO.42.5 ordinary Portland cement is 1%;

[0046] (4) the mass ratio of nano silicon nitride and PO 42.5 ordinary portland cement is 0.5%;

[0047] 3. Aggregate treatment agent

[0048] (1) The mass percenta...

example 2

[0060] 1. The main components of concrete:

[0061] (1) The mass ratio of water to PO 42.5 ordinary Portland cement is 0.17;

[0062] (2) The mass ratio of PO 42.5 ordinary Portland cement to the main constituent materials of concrete is 17%;

[0063] (3) The mass ratio of fine aggregate to the main constituent materials of concrete is 36%;

[0064] (4) The mass ratio of composite coarse aggregate to the main constituent materials of concrete is 47%;

[0065] 2. Wave penetration enhancer

[0066] (1) The mass ratio of polycarboxylate water reduction and PO 42.5 ordinary Portland cement is 0.7%;

[0067] (2) the mass ratio of sodium linear alkylbenzene sulfonate and PO 42.5 ordinary Portland cement is 1.4%;

[0068] (3) The mass ratio of aluminum dihydrogen phosphate and PO 42.5 ordinary Portland cement is 1.4%;

[0069] (4) the mass ratio of nano silicon nitride and PO 42.5 ordinary Portland cement is 0.9%;

[0070] 3. Aggregate treatment agent

[0071] (1) The mass per...

example 3

[0083] 1. The main components of concrete:

[0084] (1) The mass ratio of water to PO 42.5 ordinary Portland cement is 0.18;

[0085] (2) The mass ratio of PO 42.5 ordinary Portland cement to the main constituent materials of concrete is 18%;

[0086] (3) The mass ratio of fine aggregate to the main constituent materials of concrete is 38%;

[0087] (4) The mass ratio of composite coarse aggregate to the main constituent materials of concrete is 44%;

[0088] 2. Wave penetration enhancer

[0089] (1) The mass ratio of polycarboxylate water reduction and PO 42.5 ordinary Portland cement is 0.8%;

[0090] (2) the mass ratio of sodium linear alkylbenzene sulfonate and PO 42.5 ordinary Portland cement is 1.6%;

[0091] (3) The mass ratio of aluminum dihydrogen phosphate and PO 42.5 ordinary Portland cement is 1.6%;

[0092] (4) the mass ratio of nano silicon nitride and PO 42.5 ordinary portland cement is 1.2%;

[0093] 3. Aggregate treatment agent

[0094] (1) The mass per...

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Abstract

The invention discloses a preparation method of electromagnetic wave-transparent concrete. The electromagnetic wave-transparent concrete is mainly prepared from cement, fine aggregate, composite coarse aggregate and a wave-transparent reinforcing agent. The composite coarse aggregate is composed of quartz stone particles, plastic particles and boron nitride ceramic particles. The wave-transparent reinforcing agent is mainly prepared from polycarboxylic acid water reducer, linear alkyl sodium benzene sulfonate, aluminum dihydrogen phosphate and nano silicon nitride. The composite coarse aggregate is wrapped by an aggregate treating agent and uniformly mixed with the cement, the wave-transparent reinforcing agent is added into the mixture, and finally, the electromagnetic wave-transparent concrete is prepared by adopting a pressurized wrapping, curing and forming process. Namely, the 28d strength of a concrete test block prepared by adopting a composite coarse aggregate pretreatment-wave-transparent reinforcing agent-pressurized wrapping process is not lower than 30MPa, the wave-transparent rate in a 5G frequency band exceeds 70%, and the concrete test block has a great application prospect in the aspect of improving 5G mobile signals.

Description

technical field [0001] The invention relates to a method for preparing electromagnetic wave-transparent concrete, which belongs to the technical field of new building materials. A wall prepared by using the concrete can greatly improve the electromagnetic wave transmittance of the concrete. Background technique [0002] Wave-transparent materials are widely used in radar antenna shields, wave-transparent walls for electronic countermeasures, radome for TV transmitters and microwave communication transmitters. Its function is to let the electromagnetic wave signal pass through smoothly. The best effect of the wave-transparent material is that when the electromagnetic wave is transmitted through the material, it will be partially reflected on the surface of the material, and the electromagnetic wave transmitted into the material through refraction will have a small amount of loss in the transmission process and transform into heat energy, and most of the rest of the electromag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00258C04B2201/50C04B24/281C04B18/023C04B16/082C04B14/06C04B14/328C04B22/16C04B24/20C04B2103/302
Inventor 李悦刘江林金彩云程娅萍杨斌
Owner BEIJING UNIV OF TECH
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