Preparation process of recycled concrete aggregate

A technology for recycled concrete and preparation process, applied in the field of concrete, can solve the problems such as the fact that the production equipment technology of the recycled aggregate preparation process has not been completely solved, the existing process has not been fully considered, and the technical requirements of the equipment are different, so as to achieve convenient operation and improve recycling. rate, no secondary pollution effect

Active Publication Date: 2014-03-12
CHANGZHOU ARCHITECTUAL RES INST GRP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, there are the following deficiencies in the process arrangement: ①The change of the processing object leads to different technical requirements for the equipment, and the existing process does not fully consider
③ The existing process does not carry out technical transformation on the crushi

Method used

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  • Preparation process of recycled concrete aggregate
  • Preparation process of recycled concrete aggregate
  • Preparation process of recycled concrete aggregate

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1: first hammer the concrete block with a particle size greater than 300mm, cut the steel bars in the concrete block, sort out various impurities in the concrete block, and then remove the waste steel bars in the concrete block with a magnetic device, Afterwards, the concrete block is passed through the separation table to remove non-ferrous impurities, and then the concrete is subjected to primary crushing treatment through the jaw crusher. The model of the jaw crusher is PE-400×600, and the minimum The feed particle size is 300mm, the discharge particle size is set to 45mm, the working frequency of the movable jaw is 75 times / min, the aggregate destruction rate is 25%, the production capacity is 45t / h, and the unit energy consumption is 2400.0kJ / t ; The working frequency of the movable jaw is 100 times / min, the destruction rate of the aggregate is 40%, the production capacity is 63t / h, and the unit energy consumption is 1714.3kJ / t; the working frequency of t...

Embodiment 2

[0021] Embodiment 2: first hammer the concrete block with a particle size greater than 300mm, cut the steel bars in the concrete block, sort out various impurities in the concrete block, and then remove the waste steel bars in the concrete block with a magnetic device, Afterwards, the concrete block is passed through the separation table to remove non-ferrous impurities, and then the concrete is subjected to primary crushing treatment through the jaw crusher. The model of the jaw crusher is PE-400×600, and the minimum The feed particle size is 300mm, the discharge particle size is set to 60mm, the working frequency of the movable jaw is 75 times / min, the aggregate damage rate is 16%, the production capacity is 62t / h, and the unit energy consumption is 1742.0kJ / t ; The working frequency of the movable jaw is 100 times / min, the destruction rate of the aggregate is 15%, the production capacity is 82t / h, and the unit energy consumption is 1317.0kJ / t; the working frequency of the mo...

Embodiment 3

[0023]Embodiment 3: first hammer the concrete blocks with a particle size greater than 300mm, cut the steel bars in the concrete blocks, sort out various impurities in the concrete blocks, and then use magnetic equipment to remove the waste steel bars in the concrete blocks, Afterwards, the concrete block is passed through the separation table to remove non-ferrous impurities, and then the concrete is subjected to primary crushing treatment through the jaw crusher. The model of the jaw crusher is PE-400×600, and the minimum The feed particle size is 300mm, the discharge particle size is set to 70mm, the working frequency of the movable jaw is 75 times / min, the aggregate damage rate is 12%, the production capacity is 50t / h, and the unit energy consumption is 2160.0kJ / t ; The working frequency of the movable jaw is 100 times / min, the destruction rate of the aggregate is 13%, the production capacity is 90t / h, and the unit energy consumption is 1200.0kJ / t; the working frequency of ...

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Abstract

The invention discloses a preparation process of a recycled concrete aggregate. The preparation process comprises the following treatment steps: hammering concrete blocks with the grain size being greater than 300mm, cutting reinforcing steel bars in the concrete blocks and picking impurities in the concrete blocks; separating; removing iron impurities and non-iron impurities in sequence; performing primary crushing treatment, then performing drying thermal treatment, and performing secondary crushing treatment; screening to obtain recycled concrete aggregate particles with the grain sizes being 20-40mm, 5-20mm and less than 5mm respectively; performing wind power grading treatment on the recycled concrete aggregate with the particle size being less than 5mm, and removing fine powder with the grain size being less than 0.15mm to obtain the recycled concrete aggregate particles being 0.15-0.5mm. By adopting a mode, the preparation process of the recycled concrete aggregate has the advantages that the quality of the recycled concrete aggregate is improved, the recovery rate of waste concrete is increased, no secondary pollution is caused, and the preparation process is economic, feasible and convenient to operate.

Description

technical field [0001] The invention relates to the field of concrete, in particular to a preparation process of recycled concrete aggregate. Background technique [0002] In recent years, the world's construction industry has entered a stage of rapid development. As the largest man-made material, the occupation of natural resources and the negative impact on the environment of concrete have also triggered discussions on sustainable development. The amount of waste concrete demolished every year in the world, waste concrete produced by new buildings, and waste concrete discharged from concrete factories and prefabricated construction plants is huge. At the same time, it is expected that the amount of waste concrete discharged in the future will increase with the acceleration of the urbanization process worldwide, and the demolition and reconstruction of original buildings will increase day by day. The traditional treatment method of waste concrete is mainly to transport it...

Claims

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Application Information

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IPC IPC(8): C04B18/16
CPCY02W30/91
Inventor 朱平华杨江金周永峰张鑫鑫张菁燕谢飞飞
Owner CHANGZHOU ARCHITECTUAL RES INST GRP CO LTD
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