JPS5942049A - Pre-treating method for concrete waste material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for pre-treating concrete waste during its recovery.

Concrete waste generated from demolition sites is contaminated with reinforcing bars, earth and sand, debris, wood chips, etc., making it difficult to collect and reuse.

Furthermore, the concrete waste generated at demolition sites is not uniform in size, which also complicates the collection method. .

OBJECTS OF THE INVENTION (- To provide a pretreatment method that removes foreign substances with fewer steps and has a high recovery effect.

In order to recover one concrete block 4'A, the waste materials generated from the demolition site must be efficiently pre-processed into recovered raw materials. The main purpose of this pretreatment is to
Removal of fine earth, sand, mud, etc. and transition to the regeneration process 1
C. The purpose is to form a mixture of suitable size. Moreover, these steps are required to be simple and repeatable, and furthermore, there is no waste (useful materials are not thrown away).

Therefore, it is necessary to temporarily separate the waste and collect it in the processing step a.

Hereinafter, one embodiment of the present invention will be explained in flowchart 1.

Referring to Fig. 1, waste concrete blocks 1 generated at a demolition site are a mixture of large blocks, small blocks, reinforcing bars, cloth, etc.
Wood chips or other earth and sand? The waste concrete blocks 1 are stored in a stockyard 3 by means of transport 2 such as trucks. The waste concrete collected and entrusted to Stockyard 3 has the roughness of large concrete blocks shown in A:
It is subjected to a jil process, a reinforcing steel removal process indicated by B, and a soil and foreign matter removal process indicated by O, and then taken out as a raw material for regenerated bone.

Therefore, the steps A, B, and C will be described in detail.

Stockyard 3's raw material concrete blocks are divided into large block blocks of 500 mmφ or more through sorting process 1.
and smaller blocks 6. The large block 5 is crushed by a hydraulic play kerf h 50
Crushing with a hydraulic breaker that will reduce the diameter to less than 0 mmφ (
d As shown in Figure 2, the large block 31 is connected to the hydraulic breaker 3.
At step 2, crush to 500 mmφ or less at till pressure L.

At this time, b<stripe 33 is peeled off and removed, so it can be sorted out. In addition, some reinforcing bars 33 remain in the crushed blocks 34, but they are removed in a separate process.By crushing with a hydraulic play kerf, the reinforcing bars are cut and removed 8. On the other hand, the small blocks of 500 mmφ or less are merged into the small blocks 6 separated in the previous step, and are made into coarsely divided diblocks 9. This roughly split jib block 9 contains reinforcing bars, earth and sand, wood chips, cloth, etc.
First, foreign substances such as wood and cloth are removed 10 visually. The sorted foreign matter is disposed of. Next, Grizzly-1
Remove earth and sand according to step 1. As shown in Figure 3, the removal of earth and sand by the Grizzly-11 is carried out by placing the coarse block from which the foreign matter has been removed on the Grizzly-41 with a mesh size of 100 mm, and vibrationally sorting out concrete and earth and sand with a size of 100 mm or less. That is, iron hfi 43 and earth and sand 44 were attached to the coarsely divided concrete block 42, and earth and sand 4 were attached to it.
5 is mixed in. Among these, small particles are sieved by J slow motion, but in addition to earth and sand 46, concrete pieces 47 are also mixed in the sieved 1. Among these concrete pieces 1 and 46, Japanese dogs (for example, those larger than 40 mmφ) will be collected and destroyed as described below. It is sieved by the Grizzly 41, and the coarsely divided nine blocks 48 are transferred to the next process.

Now, by selection by Grizzly-11, 100 m
Block 12 with a diameter of mφ or more, earth and sand, and 100 m
Concrete 13 with a diameter of less than mφ is eroded. It is crushed by a rough-splitting jib block 12 and a shimmy crusher 14, and after the reinforcing bars are removed by a magnetic separator 15, it becomes a raw concrete mass and becomes a raw material for raw aggregate.

Reinforcing bars 16 id removed by the magnetic separator: Reinforcing bars 8 removed by the hydraulic breaker 7 are combined and disposed of F. In addition, the earth and sand and concrete 13 with a diameter of 100 mm or less are passed through a screen 17, and concrete 18 with a diameter of 40 mm or more is recovered and merged into the raw concrete mass.

Moreover, the separated earth and sand 19 are disposed of.

Of the above, show crusher 14
According to; explain the 1A classification of the bartica muscle.

In the show crusher 14, as shown in FIG.
This crushes the coarsely divided jib block 54 to such an extent that it can pass through. At this time, the reinforcing bars 5 in the roughly divided block 54
5 is separated, placed on a belt conveyor 56, and transferred to the next process.

As shown in FIG. 5, the magnetic condyle 15 attracts the reinforcing bars 62 on the belt conveyor 1 with magnets 63 and conveys them with the belt conveyor 64.

As congratulated above, according to the present invention, recycled aggregate can be efficiently recovered from concrete waste materials generated at demolition sites, and each process is simple and requires only a minimum number of steps.

It should be noted that the above-mentioned block diameter is changed depending on how much aggregate is to be recovered, so it is clear that the above-mentioned numerical value is not better than the example of 111. It is also obvious that some steps may be replaced with other steps if necessary. For example,
Foreign matter removal may be performed with water content of 1+f#. How many more meters?
The expression mφ has the same meaning as the particle size expression in which φ is omitted.

[Brief explanation of the drawing]

Figure B1 is a flowchart showing one embodiment of the present invention, Figure 2 is a schematic diagram explaining a hydraulic breaker, and Figures 3 and 3 are flowcharts showing one embodiment of the present invention.
FIG. 4 is a schematic diagram illustrating a jaw crusher, and FIG. 5 is a schematic diagram illustrating a magnetic separator. . Agent Patent Attorney Tsuji San Dept. Figure 2 Figure 3;

Claims (1)

[Claims] A process of separating concrete waste into large blocks and small blocks, crushing the large blocks into small blocks, removing reinforcing bars on the one hand, and converting the crushed small blocks into the separated small blocks. a step of merging into lump blocks, a step of removing earth and sand mixed with coarse concrete from the joined small lump blocks, a step of crushing the small lump blocks from which the earth and sand have been removed, and a step of crushing the small lump blocks from which the earth and sand have been removed. a step of removing reinforcing bars from the small lump block, a step of recovering coarse concrete from the removed earth and sand, and a small block from which the recovered coarse particles and the reinforcing bars have been removed. A method for pre-processing concrete waste, which is characterized in that it is combined with concrete waste and used as a raw material for recycled aggregate.