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Artificial lightweight aggregate based on ferrite wave-absorbing composite material and preparation method thereof

A composite material and ferrite technology, applied in the field of building materials, can solve the problems of increased construction cost, difficulty in obtaining wave absorbing properties, and difficulty in realizing wave absorbing materials, and achieves the effect of high absorption rate and harm reduction.

Active Publication Date: 2018-11-13
TSINGHUA INNOVATION CENT IN DONGGUAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this type of wave-absorbing agent-filled wave-absorbing building materials, although this method has the advantages of convenient preparation and simple process, in the concrete structure, the cementitious material accounts for about 30% of the concrete material, and most of the other fillers are Coarse aggregates and fine aggregates are the main ones. It can be seen that it is difficult to obtain ideal wave-absorbing performance only by adding wave-absorbing agents to cement. Adding wave-absorbing agents to cement will inevitably increase the thickness of the building's macrostructure , while the construction cost is greatly increased, it is also difficult to achieve the characteristic requirements of "light weight and thin layer" of the absorbing material

Method used

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  • Artificial lightweight aggregate based on ferrite wave-absorbing composite material and preparation method thereof
  • Artificial lightweight aggregate based on ferrite wave-absorbing composite material and preparation method thereof
  • Artificial lightweight aggregate based on ferrite wave-absorbing composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0024] Solid raw materials: fly ash 1000g, wave absorbing agent 200g, bentonite 100g;

[0025] Liquid auxiliary additives: sodium hydroxide 20g, water glass 80g, water 250g, add sodium hydroxide to water glass, dissolve, stir evenly, wait until the temperature drops to room temperature, it is an alkali activator;

[0026] First, weigh the solid raw material according to the above ratio, stir it in a high-speed mixer for 15-30 minutes, then put the uniformly mixed powder raw material into the disc granulator, and granulate it through the rotating disc at a speed of 30-40r / min. Add liquid auxiliary additives during the granulation process, spray granulate into spherical particles with a particle size of 5-15mm, then maintain at a temperature of 70°C and a humidity of ≥90% for 24 hours, and dry at 120°C for 2 hours to obtain green pellets ;

[0027] Then put the green balls into a high-temperature furnace or a rotary kiln to sinter at a heating rate of 2°C / min to 1100°C for 2 ho...

Embodiment 2

[0029] Solid raw materials: fly ash 1000g, wave absorbing agent 250g, bentonite 100g;

[0030] Liquid auxiliary additive: take by weighing 10g of sodium carbonate, 40g of water glass, and 250g of water, add sodium carbonate in the water glass, dissolve, stir evenly, and wait for the temperature to drop to room temperature to be an alkali activator;

[0031] First, weigh the solid raw material according to the above ratio, stir it in a high-speed mixer for 15-30 minutes, then put the uniformly mixed powder raw material into the disc granulator, and granulate it through the rotating disc at a speed of 30-40r / min. Add liquid auxiliary additives during the granulation process, spray granulate into spherical particles with a particle size of 5-15mm, then maintain at a temperature of 70°C and a humidity of ≥90% for 24 hours, and dry at 150°C for 2 hours to obtain green pellets ;

[0032] Put the green billet into a high-temperature furnace or a rotary kiln at a heating rate of 2°C / ...

Embodiment 3

[0034] Solid raw materials: fly ash 1000g, wave absorbing agent 300g, bentonite 100g,

[0035] Liquid auxiliary additive: take 20g of potassium hydroxide, 80g of water glass, and 250g of water, add potassium hydroxide to the water glass, dissolve, stir evenly, and wait for the temperature to drop to room temperature to be an alkali activator;

[0036] First, weigh the solid raw material according to the above ratio, stir it in a high-speed mixer for 15-30 minutes, then put the uniformly mixed powder raw material into the disc granulator, and granulate it through the rotating disc at a speed of 30-40r / min. Add liquid auxiliary additives during the granulation process, spray granulate into spherical particles with a particle size of 5-25mm, then maintain at a temperature of 70°C and a humidity of ≥90% for 24 hours, and dry at 100°C for 5 hours to obtain green pellets ;

[0037] Put the green balls into a high-temperature furnace or a rotary kiln and sinter at a heating rate of ...

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Abstract

The invention provides an artificial lightweight aggregate based on a ferrite wave-absorbing composite material and a preparation method thereof. The artificial lightweight aggregate is prepared fromthe raw materials in parts by weight: 1,000 parts of flyash with particle size of 20-100 microns, 200-350 parts of wave absorbing agent and 100-300 parts of additives, wherein the wave absorbing agentis ferrite powder with average particle size of 0.4-100 microns; the additives are selected from one or more of kieselguhr, attapulgite, kaolin, bentonite and vermiculite. The invention aims to improve the electromagnetic wave radiation absorption performance of aggregate products as important components of building concrete and appears in the wave absorption performance of the aggregates for thefirst time.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to artificial lightweight aggregate based on ferrite wave-absorbing composite materials and a preparation method thereof. Background technique [0002] With the rapid development of electronic information technology, electronics, communications, computers and electrical equipment have entered the home, resulting in an increase in man-made electromagnetic energy in urban space year by year, while radio and television stations, wireless communication transmitting stations, various antennas, power grids, urban transportation, personal Wireless communication means and household appliances bring people into an environment full of electromagnetic radiation. Electromagnetic radiation pollution has become a new type of pollution that humans cannot perceive but has great potential harm. Therefore, building materials with the function of absorbing electromagnetic waves ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/135C04B33/13C04B33/04C04B18/02
CPCC04B18/027C04B33/04C04B33/131C04B33/1352C04B2235/3201C04B2235/3427C04B2235/6562C04B2235/6567Y02P40/60
Inventor 常杰善贾屹海赵凯何伟发
Owner TSINGHUA INNOVATION CENT IN DONGGUAN
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