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Regenerated micro-powder lightweight aggregate and preparation method thereof

A technology for regenerating micropowder and light aggregates, applied in the production of clay products, other household appliances, ceramic materials, etc., can solve the problems of environmental and personal safety hazards, extreme needs for research, occupation of large land, etc., to reduce the impact of the environment, Low production cost and the effect of protecting the ecological environment

Inactive Publication Date: 2016-11-30
WUHAN YUANJING READY MIXED CONCRETE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most construction wastes are disposed of in traditional ways, which not only occupy a large amount of land, but also cause great harm to the environment and personal safety.
Lightweight aggregates prepared by existing technologies generally use shale, clay, fly ash, expanded perlite, coal gangue, etc. as raw materials, and there are very few studies on using construction waste as the main raw material to produce lightweight materials. The research on the preparation of lightweight aggregate from construction waste is extremely needed

Method used

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  • Regenerated micro-powder lightweight aggregate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A regenerated micro-powder light aggregate is composed of the following components in weight percentage: 85% of construction waste powder, 1% of flux, 12.5% ​​of adhesive, and 1.5% of wood powder.

[0026] The preparation method of the above-mentioned regenerated micropowder lightweight aggregate comprises the following steps:

[0027] 1) Crushing: crushing construction waste into 30mm particles;

[0028] 2) Ball milling: mill the crushed construction waste particles for 4 hours to obtain construction waste powder ≤ 80 μm;

[0029] 3) Mixing and stirring: Weigh the construction waste powder, flux, adhesive, bauxite, and sawdust powder according to the mass ratio and stir evenly;

[0030] 4) Forming into balls: shape the uniformly stirred materials into spherical particles with a particle size of 3mm~10mm;

[0031] 5) Firing process: After calcining the spherical particles at 350°C for 2.5 hours, the temperature was raised to 1350°C for 10 minutes, and the regenerated ...

Embodiment 2

[0033] A regenerated micro-powder lightweight aggregate is composed of the following components in weight percentage: 74% of construction waste powder, 0.5% of flux, 14.5% of adhesive, 8% of bauxite, and 3% of wood powder.

[0034] The preparation method of recycled micropowder lightweight aggregate comprises the following steps:

[0035] 1) Crushing: crushing construction waste into 25mm particles;

[0036] 2) Ball milling: mill the crushed construction waste particles for 4 hours to obtain construction waste powder ≤ 80 μm;

[0037] 3) Mixing and stirring: Weigh the construction waste powder, flux, adhesive, bauxite, and sawdust powder according to the mass ratio and stir evenly;

[0038] 4) Forming into balls: shape the uniformly stirred materials into spherical particles with a particle size of 3mm~10mm;

[0039] 5) Firing process: After calcining the spherical particles at 600°C for 1.5h, the temperature was raised to 1200°C for 30min, and the regenerated lightweight ag...

Embodiment 3

[0041] A regenerated micro-powder light aggregate is composed of the following components in weight percentage: 80% of construction waste powder, 1.5% of flux, 13% of adhesive, 4% of bauxite, and 1.5% of wood powder.

[0042] The preparation method of recycled micropowder lightweight aggregate comprises the following steps:

[0043] 1) Crushing: crushing construction waste into 30mm particles;

[0044] 2) Ball milling: mill the crushed construction waste particles for 4 hours to obtain construction waste powder ≤ 80 μm;

[0045] 3) Mixing and stirring: Weigh the construction waste powder, flux, adhesive, bauxite, and sawdust powder according to the mass ratio and stir evenly;

[0046] 4) Forming into balls: shape the uniformly stirred materials into spherical particles with a particle size of 3mm~10mm;

[0047] 5) Firing process: After calcining the spherical particles at 300°C for 2.5 hours, the temperature was raised to 1050°C for 25 minutes, and the regenerated lightweigh...

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Abstract

The invention discloses regenerated micro-powder lightweight aggregate and a preparation method thereof. The regenerated micro-powder lightweight aggregate disclosed by the invention consists of the following components in percentage by weight: 74-90% of construction waste powder, 0.5-1.5% of a fluxing agent, 8-15% of an adhesive, 0-8% of bauxite and 0.5-3% of saw dust. The preparation method comprises the following steps: uniformly mixing the components in a ratio, pelletizing the components so as to obtain granules of 3-10mm, calcining the granules for 1.5-2.5 hours at 300-600 DEG C, heating the granules to 1050-1350 DEG C, keeping the temperature for 3-30 minutes, and performing cooling to the room temperature, thereby obtaining the regenerated micro-powder lightweight aggregate. The regenerated micro-powder lightweight aggregate disclosed by the invention has the beneficial effects of being wide in raw material resource, beneficial to recycling and reuse of solid wastes and good in promotion on ecological environment protection and development of circular economy, the density of the regenerated micro-powder lightweight aggregate is 500-900g / cm<3>, the water absorption rate of the regenerated micro-powder lightweight aggregate is 5-15%, and the cylinder compressive strength of the regenerated micro-powder lightweight aggregate is 1.5-6kg / m<3>.

Description

technical field [0001] The invention relates to the field of solid waste utilization, in particular to a regenerated micro-powder light aggregate and a preparation method thereof. Background technique [0002] With the continuous increase in the scale of urban reconstruction and expansion in my country and the rapid advancement of the construction of a new socialist countryside, the demolition of a large number of old buildings and structures has produced a large amount of construction waste such as concrete, bricks, stones, mortar and tiles. According to the estimate of the Ministry of Housing and Urban-Rural Development, by 2020, China will build 30 billion square meters of new housing, and the resulting construction waste will reach at least 5 billion tons. At present, most construction wastes are disposed of in traditional ways, which not only occupy a large amount of land, but also cause great harm to the environment and personal safety. Lightweight aggregates prepared...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B35/63C04B33/13
CPCC04B33/13C04B33/131C04B33/132C04B33/1328C04B2235/3217C04B2235/77C04B2235/96Y02P40/60
Inventor 周晓阳张双艳
Owner WUHAN YUANJING READY MIXED CONCRETE CO LTD
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