JP6715168B2 - Concrete processing equipment, concrete processing method - Google Patents

Description

The present invention relates to a concrete processing device and the like for separating concrete aggregates and the like.

When you purchase concrete from a ready-mixed concrete plant in the city and place it in civil engineering and construction work, in order to prepare for the loss of concrete at the time of placing, purchase a slightly larger amount of concrete than you actually need and agitator car Often brought to the site.

Therefore, surplus concrete (so-called residual concrete) is generated after the construction. In addition, concrete adheres to the chute of agitator cars, and residual concrete is generated when cleaning this at the construction site.

When processing residual concrete at the site, usually, excavate the ground and lay a blue sheet etc. in the excavation part, put the residual concrete in it and wash it with water, after hardening the concrete, crush it and make it as concrete trash. Delivered as industrial waste treatment. Alternatively, the residual contaminated with water may be put in a drum and the entire drum may be treated as industrial waste.

The residual concrete contains aggregates such as coarse aggregates and fine aggregates that can be reused as resources, but in the above method, such aggregates are also discarded together with concrete trash, and It is required to reuse effectively.

In this regard, in Patent Document 1, the residual concrete is separated into coarse aggregate and mortar using a boat-shaped bucket provided with an aggregate separation screen, and a roadbed material is manufactured from the separated coarse aggregate and mortar. Is listed. In Patent Document 2, the residual concrete and water are added to a mixer placed on a gantry, the mixer is rotated to separate the aggregate from the residual corn, and the aggregate is stored in an aggregate holding section under the gantry while It is described that the remaining condensate treated water excluding wood is stored in a tank chamber and subjected to treatment such as neutralization and coagulation.

JP 2010-214718 JP JP 2008-49479 JP

However, in Patent Document 1, since coarse aggregate is separated by using one aggregate separation screen, fine aggregate having a small particle diameter passes through the screen together with mortar and is deposited on the bucket to form fine aggregate. It is difficult to collect wood. It is conceivable to reduce the mesh of the screen to separate the coarse aggregate and the fine aggregate, but if the screen is made fine, it may be clogged immediately and the separation of concrete may not be successful.

Further, in Patent Document 2, since the aggregate and the residual condensate treated water excluding the aggregate are discharged into separate spaces, there is a problem that the device becomes large-scaled and the construction site where the device can be installed is limited.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a concrete processing device or the like that can appropriately separate and reuse aggregate in concrete and can be made compact. To do.

A first invention for solving the above-mentioned problems has a concrete treatment tank for receiving concrete and sieves arranged in a plurality of upper and lower stages in the concrete treatment tank, and the mesh of the sieve in the upper stage. is much larger than the sieve of the lower, the concrete processing bath has a water therein, after the concrete has been dispersed in water in the concrete processing bath, and precipitated by its own weight, Ru separated by the sieve It is a concrete processing device characterized by the above.

With the concrete processing apparatus of the present invention, aggregates and the like in the residual concrete can be easily and suitably separated on site. In particular, by installing multiple sieves with different meshes in order from the largest mesh, coarse aggregate with a large grain size is deposited on the upper sieve, while mortar in concrete and small grain size are accumulated. The fine aggregate easily passes through the sieve, and the sieve is not clogged so that separation of concrete is not hindered. Since the fine aggregate having a small particle size is deposited on the lower sieve, both the fine aggregate and the coarse aggregate can be suitably separated and collected, and the aggregate collected on site can be effectively used. Further, in the present invention, since the aggregate and the like are separated in the concrete treatment tank for receiving the concrete, the apparatus can be made compact and the cost can be reduced, and a wide space is not required.

It said concrete processing tank, inside which have a water, to the water, that include separation agent to facilitate separation of the aggregate of the concrete may also be desirable.
In the present invention, the concrete poured into the concrete treatment tank can be dispersed in water to promote the separation of aggregates and the like. By adding a separating agent such as polycarboxylic acid to this water, the separation of concrete aggregate or the like can be further promoted.

It is desirable that the concrete processing apparatus of the present invention further includes a water storage tank for storing the water discharged from the concrete processing tank. It is also desirable to further have a neutralization tank for neutralizing the water discharged from the concrete treatment tank.
By providing the above-mentioned water storage tank, alkaline water is not directly discharged from the concrete processing tank to the outside of the apparatus when pouring washing water containing concrete or the like. Further, by providing the above-mentioned neutralization tank, it becomes possible to separately neutralize the alkaline water discharged from the concrete treatment tank and return it to sewage or the like.

The interior of the concrete treatment tank is divided by a vertical partition plate into an aggregate separation chamber in which the sieve is arranged and a drainage chamber for discharging water from the concrete treatment tank, and the partition plate and the concrete treatment chamber. It is desirable that a gap be formed between the bottom of the tank and the bottom.
This makes it possible to discharge the supernatant water that does not contain concrete or the like from the drainage chamber, which facilitates the treatment of drainage.

It is desirable that the concrete processing tank has a column portion for mounting the lowermost sieve.
Thereby, the space for depositing the mortar separated from the concrete can be secured at the bottom of the concrete processing tank.

It is desirable that the sieve can be taken out from the concrete processing tank.
Thereby, the aggregate accumulated on the sieve can be easily taken out together with the sieve, and the sieve can be easily cleaned and repeatedly used.

A second invention is to pour concrete into a concrete treatment tank of the concrete treatment apparatus of the first invention at a construction site to recover aggregate accumulated on each sieve and mortar accumulated on the bottom of the concrete treatment tank. Is a concrete processing method.

INDUSTRIAL APPLICABILITY According to the present invention, an aggregate in concrete can be suitably separated and reused, and a concrete processing device or the like that can be made compact can be provided.

The figure which shows the outline of the concrete processing apparatus 1. The figure which shows the concrete processing tank 10. The figure which shows the sieve 20. The figure which shows the concrete processing tank 10 in the state which has arrange|positioned the sieve 20. The figure explaining the concrete processing method. The figure explaining the concrete processing method. The figure explaining the concrete processing method.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

(1. Concrete processing equipment 1)
FIG. 1 is a diagram showing an outline of a concrete processing apparatus 1 according to an embodiment of the present invention. This concrete treatment device 1 is installed at a construction site, and includes surplus concrete generated after construction and concrete contained in washing water after washing a chute of an agitator car, aggregates such as coarse aggregate and fine aggregate. Is separated, and these aggregates can be reused. Hereinafter, these concretes may be referred to as residual concrete.

The concrete processing apparatus 1 has a concrete processing tank 10, a water storage tank 50, a neutralization tank 70, and the like.

The concrete processing tank 10 receives the above-mentioned residual concrete and separates the aggregate and the mortar from the concrete. The concrete treatment tank 10 is used with water 30 inside, and a sieve 20 for separating aggregate or the like from concrete is arranged in the concrete treatment tank 10.

The water storage tank 50 stores the water 30 discharged from the concrete processing tank 10 via the hose 40. When the aggregate and mortar are separated from the concrete in the concrete treatment tank 10, the water 30 in the concrete treatment tank 10 becomes alkaline.

The neutralization tank 70 neutralizes the alkaline water 30 sent from the water storage tank 50 by the pump 61 via the hose 60 and the like with a neutralizing agent such as an inorganic acid.

(2. Concrete treatment tank 10 and sieve 20)
FIG. 2 is a view showing the concrete processing tank 10. 2A is a plan view of the concrete treatment tank 10, and FIG. 2B is a view showing a side surface of the concrete treatment tank 10 viewed from the lower side of FIG. 2A. 2C is a view showing a cross section taken along line AA of the concrete processing tank 10 of FIG. 2A.

The concrete processing tank 10 has a box shape with an open top. The concrete treatment tank 10 has a substantially rectangular plane, and is partitioned into a drainage chamber 11 and an aggregate separation chamber 12 by a partition plate 13 in the vertical direction. A gap 130 is provided between the partition plate 13 and the bottom surface of the concrete treatment tank 10.

A suspension unit 110 is provided on the side surface of the concrete treatment tank 10, and the suspension unit 110 of the concrete treatment tank 10 can be suspended and moved by a small crane or the like.

As described above, the concrete treatment tank 10 is used in a state where the water 30 is contained therein. The drainage chamber 11 is for discharging the water 30 in increments of volume from the concrete processing tank 10 when the residual concrete is poured into the concrete processing tank 10 as described later. The water 30 in the drainage chamber 11 is drained to the water storage tank 50 via the hose 40 as described above.

An openable and drainable drainage port 111 for attaching the hose 40 is provided at the upper portion of the side surface of the drainage chamber 11. In the present embodiment, a similar drain port 111 is also provided on the lower portion of the side surface of the drain chamber 11.

The aggregate separating chamber 12 receives the residual concrete and separates the mortar and the aggregate from the concrete. Sieves 20 (see FIG. 1) are arranged in a plurality of upper and lower stages in the aggregate separating chamber 12, and a column portion 121 for mounting the lowermost sieve 20 is arranged on the bottom surface of the aggregate separating chamber 12. For the column portion 121, L-shaped steel or the like can be used. Reference numeral 122 in FIG. 2 is a guide plate used for positioning when arranging the sieve 20, and a flat bar or the like arranged vertically is used.

FIG. 3 is a view showing the sieve 20. FIG. 3A is a plane of the sieve 20, and FIGS. 3B and 3C are side views of the sieve 20 seen from the lower side and the right side of FIG. 3A, respectively.

The sieve 20 is configured by attaching a wire mesh 24 onto a frame 25 with a binding band (not shown) or the like. The frame body 25 is formed by connecting the side plates 22 and 23 with the reinforcing plate 21, and has a substantially square grid shape as a whole. Steel plates or the like are used for the reinforcing plate 21 and the side plates 22 and 23.

The side plates 22 are arranged at the four corners of the frame body 25 in the plane, and the side plates 23 are arranged in the center of the outer sides of the frame body 25 in the plane.

As shown in FIG. 3C, the side plate 22 has a substantially U-shaped cross section. The side plate 22 is arranged such that the upper side of its cross section is along the upper surface of the frame body 25, and the lower side of its cross section is shorter than the upper side. The side plate 23 also has a cross-sectional shape similar to that of the side plate 22, and the upper side thereof is also arranged along the upper surface of the frame body 25. A handle 221 is provided on the side plate 22.

The reinforcing plate 21 is a flat bar or the like, and is arranged so as to connect the side plates 22 and 23 in a plane shape in a plane.

The wire netting 24 is formed by arranging wire rods 241 such as steel wires in a mesh shape, and the mesh 242 serves as a screen to separate aggregate and mortar from concrete. The handle 221 is arranged through the mesh 242.

FIG. 4 is a diagram showing the concrete treatment tank 10 in which the sieve 20 is arranged. FIG. 4A is a plan view of the concrete processing tank 10, and FIGS. 4B and 4C are cross-sectional views taken along the lines BB and CC of FIG. 4A.

As shown in FIG. 4( a ), in the present embodiment, the sieves 20 are arranged in the aggregate separation chamber 12 of the concrete treatment tank 10 in two vertical rows and two horizontal rows in a plane. The sieve 20 is not fixed to the concrete treatment tank 10 and can be taken out manually. Although the sieve 20 is arranged along the horizontal direction, it may be arranged so as to be inclined from the horizontal direction.

Further, as shown in FIG. 4B, the sieves 20 are arranged so as to be vertically stacked in a plurality of stages (six stages in the example of the figure). The lower sides of the side plates 22 and 23 of the upper sieve 20 are arranged on the upper sides of the side plates 22 and 23 of the lower sieve 20, and the lower sides of the side plates 22 of the lowermost sieve 20 are placed on the pillar 121. .. A space is secured between the lowermost sieve 20 and the bottom surface of the concrete treatment tank 10, and mortar separated from concrete is deposited in this space as described later.

Here, the handle 221 of the side plate 22 of the lower sieve 20 is arranged at a position corresponding to the handle 221 of the side plate 22 of the upper sieve 20 in the plane. Since the lower side of the side plate 22 is shorter than the upper side as described above, the handle 221 of the side plate 22 of the lower sieve 20 can be arranged without interfering with the lower side of the side plate 22 of the upper sieve 20.

The mesh of each sieve 20 (the length of one side of the mesh 242) is in the range of 5 mm or more and 15 mm or less, the mesh of the upper sieve 20 is larger than that of the lower sieve 20, and Try to make the fit smaller (finer).

In the present embodiment, the mesh range is set to 5 mm or more and 15 mm or less, but the invention is not limited to this. For example, it is possible to use a sieve 20 having a mesh of less than 5 mm, such as 2 mm, or a sieve 20 having a mesh of more than 15 mm. However, when using a sieve 20 with a mesh size of less than 5 mm, there is a problem that the cost is high and it is easy to cause clogging due to mortar, and when using a sieve 20 with a mesh size of more than 15 mm, coarse aggregate with a large particle size is used. There is a problem that is transparent.

(3. Concrete treatment method)
Next, a concrete treatment method of separating aggregates and the like from concrete using the concrete treatment apparatus 1 and collecting the aggregate will be described.

In the present embodiment, the chute, drum, etc. of the agitator car are washed with washing water at the construction site, and concrete (remaining concrete) is placed in the aggregate separation chamber 12 of the concrete treatment tank 10 in a state of being filled with water 30 as shown in FIG. Pour wash water containing.

Note that, in FIG. 5 and FIGS. 6 and 7 to be described later, only the wire net 24 of the sieve 20 is illustrated for the sake of explanation. Further, in the present embodiment, washing water containing concrete is poured, but it is also possible to pour surplus concrete generated after construction directly into the aggregate separation chamber 12 of the concrete processing tank 10.

FIG. 6 shows the concrete treatment tank 10 in a state in which washing water containing concrete is poured. Reference numeral 100 in FIG. 6 denotes concrete contained in the wash water, and the concrete 100 is dispersed in the water 30 of the concrete treatment tank 10. This water 30 becomes alkaline.

After a while, the concrete 100 sinks under its own weight, and the aggregate 101, which is larger than the mesh of the meshes 24 of the sieve 20 in each stage, is deposited on the mesh 24 as shown in FIG. Coarse aggregate having a larger particle size is deposited on the wire netting 24 of the upper sieve 20, and fine aggregate having a smaller particle size is deposited on the metal net 24 of the lower sieve 20.

In this embodiment, the aggregate 101 is deposited in the central portion of the aggregate separating chamber 12, but if the pouring position of the washing water is appropriately changed so that the washing water is poured evenly on the plane of the aggregate separating chamber 12, the aggregate will be aggregated. 101 and the like can be evenly deposited on the flat surface of the aggregate separation chamber 12, and clogging can be prevented more reliably.

On the other hand, on the bottom of the concrete processing tank 10, mortar (mortar paste) 102 after the aggregate 101 is separated from the concrete 100 is deposited.

The volume increment of the water 30 caused by pouring the washing water or the like is not directly discharged to the outside of the apparatus, but is discharged from the drainage chamber 11 to the water storage tank 50 (see FIG. 1) via the hose 40 as shown by an arrow D in FIG. Discharge. Since the drainage chamber 11 is separated from the upper part of the aggregate separation chamber 12 by the partition plate 13, the concrete 100 or the supernatant water containing neither the aggregate 101 nor the mortar 102 separated from the concrete 100 is discharged from the drainage chamber 11. It will be.

The water 30 accumulated in the water storage tank 50 is sent to the neutralization tank 70 via a hose 60 as shown in FIG. The neutralized water 30 is returned to sewage or the like.

In the concrete processing tank 10, a hose (not shown) is attached to the drain port 111 on the lower side of the drainage chamber 11, the drain port 111 is opened, and the water 30 remaining in the concrete processing tank 10 is also drained. This drainage is also sent to the water storage tank 50 and the neutralization tank 70 by using a pump or the like, neutralized and then returned to the sewage or the like.

Since the aggregate 101 is accumulated on the wire net 24 of the sieve 20 of each stage of the concrete treatment tank 10, after draining the water 30 remaining in the concrete treatment tank 10 as described above, the sieve 20 is manually operated. And the aggregate 101 is collected and collected in a toro box or sandbag (not shown). In addition to this, the sieve 20 is also cleaned.

Since the sieve 20 is lightweight, it can be easily picked up from the concrete treatment tank 10, and the collected aggregate 101 can be diverted to a temporary roadbed or the like at the site. The aggregate 101 accumulated on the uppermost sieve 20 can be appropriately recovered without removing the sieve 20. The collected aggregate 101 can also be used as embankment material, but prior to use, for example, a designated chemical analysis was carried out according to the Environmental Agency Notification No. 46 (August 23, 1991) to elute harmful heavy metals. It is desirable to confirm the existence.

After performing the above work in order from the upper sieve 20 to the lowermost sieve 20, the mortar 102 deposited on the bottom of the concrete treatment tank 10 is collected using a scoop or the like and accumulated in a sandbag (not shown) or the like. , Will be shipped together as concrete scraps at a later date.

The sieve 20 after cleaning is returned to the inside of the aggregate separation chamber 12 of the concrete treatment tank 10 and arranged as described in FIG. 4, and water 30 is poured again on the concrete treatment tank 10 to prepare for the next concrete treatment operation. By coating the sieve 20 with an anticorrosive material such as oil, it is possible to prevent deterioration of the sieve 20 due to rust.

As described above, the concrete processing apparatus 1 of the present embodiment can easily and suitably separate the aggregate 101 and the mortar 102 in the residual concrete on site. In particular, by installing a plurality of sieves 20 having different meshes in order from the largest mesh, coarse aggregate having a large particle size is deposited on the upper sieves 20 while mortar 102 in concrete 100 and The fine aggregate having a small particle size easily passes through the sieve 20, and the sieve 20 is not clogged so that the separation of the concrete 100 is not hindered. Since the fine aggregate having a small particle size is deposited on the lower sieve 20, it is possible to suitably separate and collect both the fine aggregate and the coarse aggregate, and it is possible to effectively use the aggregate 101 collected on site.

Further, in the present embodiment, since the aggregate 101 and the like are separated in the concrete treatment tank 10 that receives the concrete 100, the concrete treatment tank 10 can be made compact, for example, the height is about 1 m, the plane is about 1 m×2 m, and the volume is Can be downsized to about 2m ³ . Therefore, the cost is low and a large space is not required. It is also possible to move the concrete treatment tank 10 by placing it on a push-pull truck.

Further, since the concrete treatment tank 10 has water 30 therein, the concrete 100 poured into the concrete treatment tank 10 can be dispersed in water to promote the separation of the aggregate 101 and the mortar 102.

Further, since the concrete processing apparatus 1 has the water storage tank 50 that stores the water 30 discharged from the concrete processing tank 10, when flushing water containing the concrete 100 is poured into the apparatus, an alkaline water is discharged from the concrete processing tank 10 to the outside of the apparatus. 30 is never discharged directly.

Since the concrete processing apparatus 1 has the neutralization tank 70 for neutralizing the water 30 discharged from the concrete processing tank 10, the alkaline water 30 discharged from the concrete processing tank 10 is separately neutralized and returned to sewage or the like. Will be possible.

Further, the inside of the concrete treatment tank 10 is divided into an aggregate separation chamber 12 in which a sieve 20 is arranged and a drainage chamber 11 for discharging water 30 from the concrete treatment tank 10 by a partition plate 13, and the partition plate 13 and the concrete. Since the gap 130 is formed between the bottom of the treatment tank 10 and the concrete 100 or the supernatant water that does not include the aggregate 101 and the mortar 102 separated from the concrete 100, it is possible to discharge the supernatant water from the drainage chamber 11. Processing becomes easier.

Further, since the concrete treatment tank 10 has the column portion 121 on which the lowermost sieve 20 is placed, a space for depositing the mortar 102 separated from the concrete 100 is provided as an aggregate separation chamber 12 of the concrete treatment tank 10. Can be secured at the bottom of.

Further, since the sieve 20 can be taken out from the concrete treatment tank 10, the aggregate 101 accumulated on the sieve 20 can be easily taken out together with the sieve 20, and the sieve 20 can be easily cleaned and repeatedly used.

However, the present invention is not limited to this. For example, in the present embodiment, the sieves 20 are arranged in upper and lower six stages, but the number of stages may be two or more and can be appropriately determined. In addition, the wire netting 24 is provided only on the upper four-step sieve 20 of the upper and lower six-step sieve 20, and the meshes 24 of the sieves 20 on each step are made smaller, for example, 15 mm, 10 mm, 7.5 mm, 5 mm from the upper step. It is possible to move on.

Further, in order to promote the separation of the concrete 100, a vibration generator (not shown) may be installed on the side surface of the concrete processing tank 10 or the like to apply vibration to the concrete processing tank 10 from the outside. Alternatively, it is possible to directly vibrate the sieve 20 with a vibration generator. It is also possible to stir the water 30 and the concrete 100 in the aggregate separation chamber 12 with a stirring blade (not shown) provided in the aggregate separation chamber 12 or the like to promote the separation of the aggregate 101 and the mortar 102. ..

In order to further promote the separation of the concrete 100, a separating agent may be added to the water 30 of the concrete treatment tank 10 to improve the separating efficiency of the aggregate 101 and the mortar 102 by the separating agent contained in the water 30. good. As the separating agent, polycarboxylic acid, oxysulfonic acid or the like used in a high performance AE water reducing material or the like can be used. The high-performance AE water-reducing material is usually used in admixture with concrete to appropriately separate the mortar and the aggregate so as to reduce the amount of water used. It can be used as a separating agent for promoting the separation of the mortar 102.

Further, a mechanism may be adopted in which the side surface of the aggregate separation chamber 12 of the concrete treatment tank 10 can be slid and removed, and by removing the side surface, the sieve 20 can be easily taken out. Alternatively, a filter cloth or the like may be provided on the bottom surface of the concrete treatment tank 10 so that the mortar 102 deposited on the concrete processing tank 10 can be immediately carried out by lifting the filter cloth or the like.

Further, a holding portion for attaching and holding the hose 40 may be provided on the side surface of the drainage chamber 11 of the concrete treatment tank 10, or a cover plate or the like may be attached to the concrete treatment tank 10 so as not to contaminate the outside. It is possible. In addition, it is also possible to attach a girder material such as H-shaped steel under the concrete treatment tank 10, and insert a fork of a forklift into the gap between the concrete treatment tank 10 and the ground to lift the concrete treatment tank 10. It becomes possible to move it.

The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the examples. It is obvious to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and it is obvious that those modifications and alterations also belong to the technical scope of the present invention. Understood.

1: Concrete treatment device 10: Concrete treatment tank 11: Drainage chamber 12: Aggregate separation chamber 13: Partition plate 21: Reinforcing plates 22, 23: Side plate 24: Wire mesh 25: Frame body 30: Water 40, 60: Hose 50: Water tank 61: Pump 70: Neutralization tank 100: Concrete 101: Aggregate 102: Mortar 110: Hanging part 111: Drainage port 121: Pillar part 130: Gap 221: Handle 241: Wire rod 242: Mesh

Claims (8)

A concrete processing tank that accepts concrete,
Sieves arranged in a plurality of upper and lower stages in the concrete treatment tank,
Have
The sieve of the eye eye of the upper, rather than size than the sieve of the lower,
Said concrete processing bath has a water therein, after the concrete has been dispersed in water in the concrete processing bath, and precipitated by its own weight, the separated in sieve concrete processing apparatus according to claim Rukoto. To the water, the concrete processing apparatus according to claim 1, wherein the includes separating agent for promoting the separation of the aggregate of the concrete. The concrete processing apparatus according to claim 1 or 2 , further comprising a water storage tank that stores water discharged from the concrete processing tank. Concrete processing apparatus according to any one of claims 1 to 3, characterized in that it comprises further a neutralization tank neutralizing the water exiting from the concrete processing bath. The interior of the concrete treatment tank is divided into an aggregate separation chamber in which the sieve is arranged, and a drainage chamber for discharging water from the concrete treatment tank, by a vertical partition plate,
The concrete processing apparatus according to any one of claims 1 to 4 , wherein a gap is formed between the partition plate and the bottom surface of the concrete processing tank. The concrete processing apparatus according to any one of claims 1 to 5 , wherein the concrete processing tank has a column portion on which the lowermost stage of the sieve is placed. The sieve, concrete processing apparatus according to any one of claims 1 to 6, characterized in that it is removable from the concrete processing bath. At the construction site, concrete is poured into the concrete processing tank of the concrete processing apparatus according to any one of claims 1 to 7 ,
A concrete treatment method comprising collecting aggregate accumulated on each sieve and mortar accumulated on the bottom of the concrete treatment tank.