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Electromagnetic wave transmission compound material as well as preparation method and application thereof

A composite material, electromagnetic wave technology, applied in the field of composite materials, can solve the problems of low compressive strength, inability to guarantee internal porosity, easy collapse mode, etc.

Active Publication Date: 2018-12-11
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the concrete electromagnetic wave transmission layer made by this method cannot meet the needs of the project in terms of related mechanical properties, such as low compressive strength, easy to collapse in the early stage, and cannot guarantee internal porosity, etc., which limits the cement-based wave transmission layer. Application of materials in actual building structures

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  • Electromagnetic wave transmission compound material as well as preparation method and application thereof

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preparation example Construction

[0039] An embodiment of the present invention provides an electromagnetic wave transmission composite material, the preparation method of which includes the following steps:

[0040] (1) prepare alkali activator: water, water glass and sodium hydroxide are mixed, stir, then leave standstill 24h, obtain alkali activator; By mass ratio, water: water glass: sodium hydroxide=(45~55 ):1:2;

[0041] (2) Preparation of the first alkali-activated slag cementitious material: add fly ash and slag to a slurry mixer, stir evenly to obtain a mixed ash body, then add an alkali activator, and stir evenly to obtain the first alkali-activated slag Cementitious material; by mass ratio, fly ash: slag = (7:5) ~ (10:3), mixed ash body: alkali activator = 1: (0.4 ~ 0.5);

[0042] (3) Sodium bicarbonate is added in the epoxy resin glue, stir evenly, obtain mixture A; According to mass volume ratio, sodium bicarbonate: epoxy resin glue=2~3g:20~30mL;

[0043] (4) Wash the expanded polystyrene partic...

Embodiment 1

[0050] Embodiment 1 provides an electromagnetic wave transmission composite material, the preparation method of which includes the following steps:

[0051] (1) prepare alkali activator: mix water, water glass and sodium hydroxide, stir 8~10min, then leave standstill 24h, obtain alkali activator; By mass ratio, water: water glass: sodium hydroxide=50: 1:2;

[0052] (2) Preparation of the first alkali-activated slag cementitious material: add fly ash and slag to a slurry mixer, stir for 120-150 seconds to obtain a mixed ash body, then add an alkali activator, and stir for 4-5 minutes to obtain the first A kind of alkali-activated slag cementitious material; By mass ratio, fly ash: slag=7:3, mixed ash body: alkali activator=1:0.4;

[0053] (3) Sodium bicarbonate is added in the epoxy resin glue, stirs 3~5min, obtains mixture A; According to mass volume ratio, sodium bicarbonate:epoxy resin glue=1g:10mL;

[0054] (4) Wash the expanded polystyrene particles with deionized water fo...

Embodiment 2

[0061] Embodiment 2 provides an electromagnetic wave transmission composite material, the preparation method of which includes the following steps:

[0062] (1) prepare alkali activator: mix water, water glass and sodium hydroxide, stir 8~10min, then leave standstill 24h, obtain alkali activator; By mass ratio, water: water glass: sodium hydroxide=45: 1:2;

[0063] (2) Preparation of the first alkali-activated slag cementitious material: add fly ash and slag to a slurry mixer, stir for 120-150 seconds to obtain a mixed ash body, then add an alkali activator, and stir for 4-5 minutes to obtain the first A kind of alkali-activated slag cementitious material; By mass ratio, fly ash: slag=7:5, mixed ash body: alkali activator=1:0.45;

[0064] (3) Sodium bicarbonate is added in the epoxy resin glue, stirs 3~5min, obtains mixture A; According to mass volume ratio, sodium bicarbonate:epoxy resin glue=2g:30mL;

[0065] (4) Wash the expanded polystyrene particles with deionized water...

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Abstract

The invention discloses an electromagnetic wave transmission compound material as well as a preparation method and application thereof. According to the electromagnetic wave transmission compound material, coal ash and slag are used as activated materials, the activated materials are reacted with an alkali-activator to generate a gelling material, and modified foaming polystyrene particles subjected to modification treatment, a foam stabilizer and a foaming agent are added. The electromagnetic wave transmission compound material is of a porous structure, the electromagnetic wave transmission compound material not only has very high electromagnetic wave transmissivity and excellent electromagnetic wave transmission performance, but also has very good mechanical performance, the compressivestrength is high, the freezing resistance and the corrosion resistance are good, collapse is not prone to happen, the porosity is stable, the preparation cost is low, and the electromagnetic wave transmission compound material is environmentally friendly and pollution-free and has very good application prospects in a building wave-absorbing material; the electromagnetic wave transmission compoundmaterial is used for preparing an electromagnetic wave transmission layer on the surface of the wave-absorbing material, the impedance characteristic of the surface of the wave-absorbing material canbe effectively improved, more incident electromagnetic waves are in the wave-absorbing material, and the electromagnetic wave reflectivity of the surface of the wave-absorbing material is reduced.

Description

technical field [0001] The invention relates to a composite material, in particular to an electromagnetic wave transmission composite material and its preparation method and application. Background technique [0002] With the rapid development of the information society and the widespread use of electronic machines, the density of electromagnetic radiation in urban living spaces is increasing. While electronic products and technologies have brought great convenience to people, they have also brought harm. Studies have shown that working and living under electromagnetic radiation conditions for a long time will cause harm to people's physical and mental health. In addition, electromagnetic radiation will interfere with electronic machines, cause malfunctions of electronic machines, affect the normal operation of the machine, and even cause serious accidents and hazards. It will also affect the reception of radio and television, cause information leakage, and cause serious in...

Claims

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Application Information

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IPC IPC(8): C04B28/08C04B38/10C04B111/40
CPCC04B28/08C04B38/10C04B2111/40C04B16/08C04B2103/48
Inventor 赵若红梅超徐安傅继阳刘爱荣吴玖荣
Owner GUANGZHOU UNIVERSITY
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