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A microwave-assisted method for sorting recycled concrete coarse aggregate

A recycled concrete and microwave-assisted technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problem that the quality of recycled concrete aggregate is difficult to guarantee, it is not suitable for large-scale production of recycled concrete aggregate, and the efficiency of selection Low-level problems, to achieve the effect of reducing the difficulty of crushing machinery crushing, protecting the original quality, and high screening efficiency

Inactive Publication Date: 2018-05-22
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a microwave-assisted method for selecting recycled concrete coarse aggregates, which has simple steps, reasonable design, easy implementation, good use effect, and can effectively solve the above-mentioned deficiencies in the prior art. The existing methods for sorting recycled concrete aggregates have problems such as low sorting efficiency, unsuitability for large-scale production of recycled concrete aggregates, and difficulty in guaranteeing the quality of recycled concrete aggregates.

Method used

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  • A microwave-assisted method for sorting recycled concrete coarse aggregate
  • A microwave-assisted method for sorting recycled concrete coarse aggregate
  • A microwave-assisted method for sorting recycled concrete coarse aggregate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Such as figure 1 A microwave-assisted method for selecting recycled concrete coarse aggregate comprises the following steps:

[0049] Step 1, microwave irradiation and cooling, the process is as follows:

[0050] Step 101, the first microwave irradiation and cooling includes the following steps:

[0051] Step 1011, microwave irradiation of waste concrete blocks: after transporting waste concrete blocks 2 and stacking them in microwave irradiation area 3, use microwave emitting device 1 to carry out microwave irradiation on waste concrete blocks 2, the irradiation height is 1.5m, and the irradiation time is 5 minutes;

[0052] The microwave emitting device 1 is arranged above the microwave irradiation area 3, and the power of the microwave emitted by the microwave emitting device 1 is 5kw; the stacking height of the waste concrete blocks 2 is not greater than 1.5m;

[0053] Step 1012, cooling: transport the waste concrete blocks 2 irradiated by microwaves in step 1011 ...

Embodiment 2

[0103] In this embodiment, different from Embodiment 1, the irradiation height in step 1011 is 1m, the irradiation time is 8min and the power of the microwave emitted by the microwave transmitting device 1 is 5.5kw, and the cooling time in step 1012 is 1min, that is, in step 10123 The soaking time is 1 min; N=2 in step 103; the sieve aperture of the screening equipment in step 3 is Φ40mm.

[0104] In this embodiment, the remaining method steps and parameters are the same as those in Embodiment 1.

Embodiment 3

[0106] In this embodiment, the difference from Embodiment 1 is that in step 1011, the irradiation height is 1.2m, the irradiation time is 3min and the power of the microwave emitting device 1 is 5.5kw, and the cooling time in step 1012 is 3min, that is, step 10123 The soaking time in medium is 3min; the sieve hole diameter of the screening equipment described in step 3 is Φ10mm.

[0107] In this embodiment, the remaining method steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention discloses a microwave-assisted recycled concrete coarse aggregate picking method. The method comprises the following steps of: firstly, carrying out microwave irradiation and cooling, namely 101, carrying out microwave irradiation for the first time and cooling, namely 1011 carrying out microwave irradiation on waste concrete blocks and 1012 cooling, wherein the step 1011 comprises the steps of transporting and piling the waste concrete blocks in a microwave irradiation region and then carrying out microwave irradiation on the waste concrete blocks by adopting a microwave transmitting device, and the step 1012 comprises the steps of transporting and soaking the waste concrete blocks subjected to microwave irradiation in a cooling water tank for cooling; 102, carrying out microwave irradiation for the next time and cooling; and 103, repeating the step 102 for once or twice; secondly, breaking; and thirdly, screening. The method disclosed by the invention is simple in steps, reasonable in design, easy to realize and good in use effect, and the problems of an existing recycled concrete aggregate picking method that the picking efficiency is low, mass production of recycled concrete aggregate is not applicable and the quality of the picked recycled concrete aggregate is difficult to guarantee can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of building material preparation, and in particular relates to a microwave-assisted method for sorting recycled concrete coarse aggregates. Background technique [0002] Concrete aggregate refers to the granular loose material that acts as a skeleton or filling in concrete. Concrete aggregate is divided into coarse aggregate and fine aggregate. Among them, coarse aggregate includes pebbles, crushed stones, waste residue, etc., and fine aggregate includes medium and fine sand, fly ash, etc. Aggregate with a particle size greater than 5 mm is called coarse aggregate, commonly known as stone. Commonly used are gravel and pebbles. [0003] In recent years, with the needs of economic development, many buildings have been demolished and a large amount of waste concrete has been generated accordingly, which not only causes a lot of waste of resources, but also is difficult to handle, takes up a lot of space, poll...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B20/02C04B18/16
CPCC04B18/16C04B20/02Y02W30/91
Inventor 代俊宋四达王思琦王辰晨
Owner XIAN UNIV OF SCI & TECH
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