JP2003170414A - Method for recycling sludge waste by using concrete mixer truck and concrete mixer truck for use in the method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for recycling a sludge waste and a concrete mixer truck for use in the method. <P>SOLUTION: The recycling method is characterized in that an inorganic bonding agent is sucked from a plant into a mixer drum of the concrete mixer truck, the inorganic bonding agent is stirred in the mixer drum while the mixer truck is on the way to a construction site, the sludge waste is sucked into the mixer drum at the reached construction site, the inorganic bonding agent and the sludge waste are kneaded together in the drum, and a mixture of the inorganic bonding agent and the sludge waste produced in the drum is placed over required areas in the construction site, and the mixer truck comprises a vacuum pump sucking air in the mixer drum to reduce a pressure in the drum, and a flexible hose connected to the mixer drum for sucking the inorganic bonding agent and/or the sludge waste into the mixer drum, and a kneading blade is provided in the drum. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recycling sludge-like waste using a concrete mixer truck and a concrete mixer truck used in this method. More specifically, the present invention relates to a concrete aggregate for constructing sludge produced at a construction site. Alternatively, it is used as a mortar aggregate and the production of raw concrete using this construction sludge is carried out on the surface of a concrete mixer truck, thereby significantly reducing the labor and cost involved in the construction sludge treatment, and accompanying the construction sludge treatment. The present invention relates to a method for recycling sludge-like waste using a concrete mixer truck capable of significantly reducing noise and vibration pollution, and a concrete mixer truck used in this method.

[0002]

2. Description of the Related Art A large amount of construction sludge, that is, sludge-like waste is generated at a construction site involving excavation work. Conventionally, this construction sludge has been loaded into a large dump truck and then transported to a predetermined sludge treatment plant and discarded. However, there are very few treatment plants for construction sludge, and dump trucks have to go to a place far away from the construction site, and when traveling back and forth over this long section, its labor and cost were enormous. In addition, the frequent traffic of large dump trucks causes a great deal of noise and vibration pollution to residents around the road, and has become a serious environmental problem. Furthermore, since the upper part of the dump truck's loading platform is open, sludge is often scattered or dropped during traveling, and the road is often polluted. In recent years, due to the recession, many people have been accused of spending much of their taxes on construction costs. The treatment of construction sludge is very costly for the reasons described above, which is one of the major causes of increasing construction costs.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and utilizes construction sludge generated at a construction site as concrete or mortar aggregate, and uses the construction sludge as raw material. By generating concrete on the concrete mixer truck, it is possible to significantly reduce the labor and cost involved in the construction sludge treatment, and to significantly reduce the noise and vibration pollution associated with the construction sludge treatment. An object of the present invention is to provide a method for recycling sludge-like waste by using, and a concrete mixer truck used in this method.

[0004]

The invention according to claim 1 is
The inorganic binder is suctioned or introduced from the inorganic binder manufacturing plant into the mixer drum of the concrete mixer truck, and the inorganic binder is stirred in the mixer drum while the mixer truck is heading to the construction site. At the site, the sludge-like waste is sucked into or introduced into the mixer drum to knead the inorganic binder and the sludge-like waste in the mixer drum, and the sludge-like waste is generated in the mixer drum at a required portion of the construction site. In the method for recycling sludge-like waste using a concrete mixer truck, the kneaded material of the inorganic binder and sludge-like waste is placed with or without a pump.

According to a second aspect of the present invention, sludge-like waste is sucked into or introduced into a mixer drum of a concrete mixer truck at a construction site, and the mixer truck is introduced into the mixer drum on the way to the inorganic cement production plant. The sludge-like waste is agitated in, and the inorganic binder is sucked into or introduced into the mixer drum at the arrived inorganic binder manufacturing plant, and thereafter the inorganic substance is mixed in the mixer drum on the way to the construction site. Kneading the binder and sludge-like waste, and placing the kneaded material of the inorganic binder and sludge-like waste generated in the mixer drum at the required location on the construction site with or without a pump. This is a method for recycling sludge-like waste using a concrete mixer truck.

According to a third aspect of the present invention, the kneaded material is sucked into or introduced into a mixer drum of a concrete mixer truck from a plant for producing a kneaded material of sludge-like waste and an inorganic binder, and the mixer truck is constructed. On the way to the site, the kneaded product of the sludge-like waste and the inorganic binder is stirred in the mixer drum, and the kneaded product in the mixer drum is pumped or used at the required location on the construction site. It is a method for recycling sludge-like waste using a concrete mixer truck, which is characterized in that it is placed without a pipe.

According to a fourth aspect of the invention, the sludge-like waste and the inorganic bonding agent are sucked and introduced into the mixer drum of the concrete mixer truck at the construction site, and the sludge-like waste is introduced into the mixer drum at the construction site. The inorganic binder is kneaded, and a kneaded product of the inorganic binder and sludge-like waste generated in a mixer drum is placed at a required location of the construction site with or without a pump. This is a method of recycling sludge-like waste using a concrete mixer truck.

According to a fifth aspect of the present invention, there is provided a vehicle for producing raw concrete or mortar from sludge-like waste as a resource for recycling, and sucking air in the mixer drum to reduce the pressure in the drum. A vacuum pump and a flexible hose connected to the mixer drum for sucking in and introducing the inorganic binder and / or sludge-like waste are provided, and the inorganic binder and the sludge-like waste are provided in the mixer drum. A concrete mixer truck, which is provided with a kneading blade for kneading to produce raw concrete or mortar.

According to a sixth aspect of the present invention, there is provided a pressure feed pump which is connected to the mixer drum and which drives a kneaded product of the inorganic binder and the sludge-like waste in the mixer drum to a required place on the construction site and the pump. The concrete mixer truck according to claim 5, further comprising a flexible hose connected to the concrete mixer truck. The above problems are solved by providing these inventions.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an example of a concrete mixer truck used in the method for recycling sludge-like waste using the concrete mixer truck according to the present invention. FIG. 2 is a flowchart showing a method for recycling sludge-like waste according to the first embodiment.

First, the concrete mixer truck (1) used in the method for recycling sludge-like waste using the concrete mixer truck according to the present invention will be described. This concrete mixer truck (1) is a vehicle for producing raw concrete or mortar from sludge-like waste as a resource for recycling, and sucks air in a mixer drum (4) to produce the concrete (4). A vacuum pump (8) for decompressing the inside and a flexure for sucking and introducing an inorganic binder such as cement powder or cement milk (cement paste) and / or sludge-like waste from the outside, which is connected to a mixer drum (4) And a kneading blade (not shown) for kneading the inorganic binder and the sludge-like waste to produce ready-mixed concrete or mortar in the mixer drum (4). It is a thing. The kneading blade is fixed to the inner wall surface of the mixer drum (4),
It is provided in a spiral shape with respect to the rotation axis of the drum (4).

This concrete mixer truck (1) has a mixer drum (4) rotatably mounted on a chassis (2) and rotatably driven by a rotation driving device (3), and a rear end of the mixer drum (4). And a shooter (not shown) connected to a discharge port located at the rear end of the mixer drum. The concrete mixer truck (1)
A pressure pump (11) which is connected to the mixer drum (4) and drives the kneaded material of the inorganic binder and the sludge-like waste in the mixer drum (4) to a required location on the construction site.
(See Figures 2-5) and a flexible hose (12) connected to this pump (11).

A vacuum pump (8) is mounted on the chassis (2), and the vacuum pump (8) is connected to the mixer drum (4) through a pipe (not shown). The vacuum pump (8) is, as described above, the mixer drum (4).
The inside pressure is reduced to generate a suction force inside the drum (4). By generating a suction force in the mixer drum (4), the hose (1 connected to the mixer drum (4) is
From the tip of 0), sludge-like waste such as construction sludge and the inorganic bonding agent can be sucked, and these fluids can be introduced into the mixer drum (4).

The mixer drum (4) is a container having a substantially barrel-shaped outer shape, and is rotatably provided in an inclined state so that the inlet and the outlet are located on the upper rear side of the vehicle. The inner wall is provided with a kneading blade (not shown) extending spirally from the front end portion toward the rear end portion. It is preferable that a plurality of hard spheres (not shown) are loaded in the mixer drum (4). When the mixer drum (4) is rotated, the hard spheres grind sludge and cement adhered to the inner wall surface of the drum (4), so that extremely efficient kneading is possible.

The flexible hose (10) is for sucking the inorganic binder and / or sludge-like waste. The flexible hose (10) may or may not have a bifurcated middle part. When a branched one is adopted, one of them is an inorganic cement suction pipe and the other is a sludge-like waste suction pipe. The simultaneous use of these tubes is advantageous because the suction time is shortened and these materials can be introduced uniformly into the mixer drum (4). When either one is not used, the lid is applied to the one not used.

A double pipe portion (18) consisting of an inner pipe (16) and an outer pipe (17) is connected to one end of the mixer drum (4) in the direction of the rotation axis. A flexible hose (10) is attached to either the inner pipe (16) or the outer pipe (17).
Is connected to the other side, and the suction pipe (19) extended from the vacuum pump (8) is connected to the other side.

One end of the mixer drum (4) in the direction of the rotation axis (the same side as the double pipe section (18) as shown in FIG. 1 or the opposite side as shown in FIG. 6). () May be provided with a hatch (20), and the hatch (20) is opened, and the mixer drum (4) is rotated in the direction in which the contents are sent out to open the hatch (20). It is possible to discharge the contents, that is, ready-mixed concrete or mortar, from the part to the outside. It should be noted that the hatch (20) does not necessarily have to be opened when the pressure feed pump (11) is used for discharging. Further, by opening the hatch (20), the inorganic binder and the sludge-like waste can be put into the opening.

The mixer drum (4) may be constructed as shown in FIG. In this example, the mixer drum (4) is supported by two hollow shafts (21) and (22), one of which is connected to a flexible hose (10) and the other of which is extended from a vacuum pump (8). The ejected suction pipe (19) is connected.

Next, this concrete mixer truck (1)
A first embodiment of a method for recycling construction sludge using a method will be described with reference to FIG. First, the inorganic binder is put into a mixer drum (4) of a concrete mixer truck (1) (hereinafter referred to as a mixer truck) from an inorganic binder manufacturing plant (7), or a vacuum pump (8) and a hose. Suction is introduced using (10) (S
T1). The mixer truck (1) moves from the inorganic cement production plant (7) to the construction site. During the movement, the mixer truck (1) stirs the inorganic bonding agent in the mixer drum (4).

The type of the inorganic binder is not particularly limited, but various cements can be used, for example. Specific examples thereof include alumina-silica based Portland cement, slag cement, alumina cement, mixed cement, and plasters such as gypsum and lime. The form when it is supplied to the mixer drum (4) may be in the form of powder, or may be the form of cement milk or cement paste mixed with water. Incidentally, in addition to a hydraulic material that cures in water, an air-curable material that cures after being dried may be used.

When the mixer truck (1) arrives at the construction site, the construction sludge, that is, sludge-like waste is put into the mixer drum (4) of the mixer truck (1), or the vacuum pump (8) and the hose ( 10) is used to introduce by suction (ST2). The sludge-like waste and the inorganic binder are mixed in a ratio such that when the kneaded product, that is, the concreteized or mortared sludge is solidified, the strength of the solidified product is sufficient as a construction skeleton. After the sludge-like waste is charged or suctioned, the inorganic binder and the construction sludge are kneaded in the mixer drum (4).

When ready-mixed concrete or mortar (mortarized sludge) is produced by kneading, a pressure feed pump (11) and a hose (1) are placed at required locations on the construction site.
Mixer drum (4) with or without 2)
The kneaded product inside, that is, fresh concrete or mortar is cast (ST3). At this time, the kneaded material is once transferred into a receiving container (9) arranged below the shooter, and the kneaded material is supplied to a required place via a pressure pump (11) and a hose (12) connected to the receiving container (9). May be placed. The direction of rotation of the mixer drum (4) during the casting operation is preferably opposite to that during the kneading operation from the viewpoint of discharge efficiency of the kneaded material. With the above, all steps of the method for recycling construction sludge according to the first embodiment are completed.

The type of construction sludge in the present invention is not particularly limited, but if possible, excavated soil and mud are mixed in advance at an appropriate ratio in a treatment plant or the like, and the necessary chemicals are appropriately added. It is preferably sludge having adjusted viscosity and fluidity. By using such adjusted sludge as construction sludge, the kneaded material (fresh concrete or mortar) produced using this sludge can be cast in every corner even in a convoluted narrow space.
The engineering properties after solidification can also be freely selected. Moreover, it has been confirmed that the kneaded product produced by using such sludge hardly causes deterioration or shrinkage in a moist environment in soil. Therefore, when this kneaded material is used for backfilling underground space, etc., the effect of preventing liquefaction during earthquakes and preventing erosion by underground permeated water increases, and
A homogeneous soil structure can be constructed when compaction is not possible.

At the construction site, the object of casting the kneaded material (fresh concrete or mortar) is not particularly limited, but for example, backfilling of various lifelines such as gas pipes, common grooves, subways, building foundations, etc. Such as backfilling of a narrow underground space at the time of construction, backfilling of unnecessary underground cavities such as abandoned mines, and underwater embankment.

According to the construction sludge recycling method of the first embodiment, the construction sludge produced at the construction site is used as concrete or mortar aggregate, and the production of fresh concrete using this construction sludge is performed by the concrete mixer. Since it is carried out on the car, it is possible to significantly reduce the labor and cost involved in the treatment of construction sludge, and the noise and vibration pollution associated with the treatment of construction sludge. It can be reused effectively.

The kneaded material composed of sludge and an inorganic bonding agent is particularly effective for backfilling and backfilling the confined space underground. In other words, in the past, this type of narrow space was often backfilled with sand, but since sand requires sufficient compaction, filling the narrow space was not sufficient for earthquake countermeasures. . In addition, ordinary concrete obtained by solidifying fine / coarse aggregates whose materials have been carefully selected according to the standard with standardized cement has many production steps and is expensive. Compared with these, a kneaded product composed of construction sludge and an inorganic binder has a small number of production steps, exhibits high strength in the ground without compaction, and can be provided at a low cost.

Next, a second embodiment of the present invention will be described with reference to FIG. In the recycling method according to the second embodiment, first, sludge-like waste is sucked into or introduced into the mixer drum (4) of the concrete mixer truck (1) at the construction site (ST1). The mixer truck (1)
Goes to the inorganic binder manufacturing plant (7) and agitates sludge-like waste in the mixer drum (4) on the way. Next, in the arrived inorganic bonding agent manufacturing plant (7), the inorganic bonding agent is sucked into or introduced into the mixer drum (4) (ST2). After that, the mixer truck (1) heads to the construction site, and on the way, the inorganic binder and the sludge-like waste are kneaded in the mixer drum (4). Upon arrival at the construction site, the kneaded material of the inorganic binder and the sludge-like waste generated in the mixer drum (4) is placed at the required location with or without the pressure pump (11) (ST3). ).

When the pressure feed pump (11) is used, the kneaded product is once transferred into a receiving container (9) arranged below the shooter (see ST3 in FIG. 3 and ST3a in FIG. 5), and is placed in the receiving container (9). The kneaded product may be placed at a required location via the connected pressure feed pump (11) and hose (12). Alternatively, the pressure pump (11) and the hose (12) are connected to the mixer drum (4) (ST3 in FIG. 5).
b)), this pump (11) and hose (12)
The kneaded product may be placed at a required position via the. Also in the second embodiment, the same effect as that of the first embodiment can be obtained.

Next, a third embodiment of the present invention will be described with reference to FIG. In the recycling method according to the third embodiment, first, the kneaded material is sucked into the mixer drum (4) of the concrete mixer truck (1) from the plant (13) that manufactures the kneaded material of sludge-like waste and the inorganic binder. Introduction or input (ST1). The mixer truck (1) heads to the construction site, and agitates the kneaded product of the sludge-like waste and the inorganic binder in the mixer drum (4) on the way. Upon arrival at the construction site, the kneaded material in the mixer drum (4) is pumped (11) to the required location.
It is placed with or without (ST2). Also in the third embodiment, the same effect as that of the first embodiment can be obtained.

Next, a fourth embodiment of the present invention will be described with reference to FIG. In the fourth embodiment, first, the vacuum pump (8) is operated at the construction site to suck and introduce the construction sludge and the inorganic bonding agent into the mixer drum (4) of the concrete mixer truck (1) (ST1, ST.
2). At this time, either the construction sludge or the inorganic binder may be sucked first. Next, at this construction site, the construction sludge and the inorganic binder are kneaded in the mixer drum (4). When raw concrete or mortar is generated by kneading, the kneaded product in the mixer drum (4), that is, raw concrete or mortar is placed at the required site of the construction site with or without the pump (8). Yes (ST3).

When the pressure feed pump (11) is used, the kneaded product is once transferred into the receiving container (9) arranged below the shooter (ST3a), and the pressure feed pump (11) and the hose connected to this receiving container (9). The kneaded material may be placed at a required position via (12). Alternatively, the pump (11) and the hose (1) are fed to the mixer drum (4).
2) may be connected (ST3b), and the kneaded product may be placed at a required location via the pressure pump (11) and the hose (12). With the above, all steps of the method for recycling construction sludge according to the fourth embodiment are completed. Also in this 4th Embodiment, the effect similar to the said 1st Embodiment can be exhibited.

[0032]

According to the method for recycling sludge-like waste using the concrete mixer truck according to the present invention, the sludge-like waste generated at the construction site is used as concrete or mortar aggregate, and the construction sludge is used. Since the ready-mixed concrete used is generated on the vehicle of the concrete mixer truck, it is possible to significantly reduce the labor and cost involved in the treatment of construction sludge and the noise and vibration pollution associated with the treatment of construction sludge. In addition, the construction sludge can be effectively reused without being discarded.

According to the concrete mixer truck of the present invention, the sludge-like waste generated at the construction site is utilized as concrete or mortar aggregate, and the production of raw concrete using this construction sludge is carried out by the concrete mixer truck. Since it can be performed above, it is possible to significantly reduce the labor and cost required for the treatment of construction sludge, and to significantly reduce the noise and vibration pollution associated with the treatment of construction sludge. It can be reused effectively.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a concrete mixer truck used in a method for recycling construction sludge using the concrete mixer truck according to the present invention.

FIG. 2 is a flowchart showing a method for recycling construction sludge according to the first embodiment.

FIG. 3 is a flowchart showing a method for recycling construction sludge according to a second embodiment.

FIG. 4 is a flowchart showing a method for recycling construction sludge according to a third embodiment.

FIG. 5 is a flowchart showing a construction sludge recycling method according to a fourth embodiment.

FIG. 6 is a view showing another example of the mixer drum of the concrete mixer truck according to the present invention.

FIG. 7 is a view showing still another example of the mixer drum of the concrete mixer truck according to the present invention.

[Explanation of symbols]

1 ... Concrete mixer truck 4 ... Mixer drum 8 ... Vacuum pump 11 ... Pressure pump

Front page continuation (51) Int.Cl. ⁷ identification code FI theme code (reference) E02F 7/00 E02F 7/00 DF term (reference) 4D059 AA09 BG00 BJ00 CB21 DA66 4G056 AA07 AA25 CB23 CC24 CD06 CD64 CE05

Claims (6)

[Claims] 1. An inorganic binder is sucked into or introduced into a mixer drum of a concrete mixer truck from an inorganic binder manufacturing plant, and the inorganic binder is agitated in the mixer drum on the way to the construction site. When the construction site arrives, the sludge-like waste is sucked into or introduced into the mixer drum to knead the inorganic binder and the sludge-like waste in the mixer drum, and the mixer drum is placed at a required location on the construction site. A method for recycling sludge-like waste using a concrete mixer truck, which comprises placing a kneaded material of the inorganic binder and sludge-like waste generated in the apparatus with or without a pump. 2. Sludge-like waste is sucked into or introduced into a mixer drum of a concrete mixer truck at a construction site, and the sludge-like waste is introduced into the mixer drum on the way to the inorganic cement manufacturing plant. After stirring, the inorganic binder manufacturing plant that arrived arrives with suction or introduces the inorganic binder into the mixer drum, and then, while the mixer truck is heading to the construction site, the inorganic binder and sludge-like waste are disposed inside the mixer drum. Concrete that is characterized in that a kneaded material is kneaded, and a kneaded material of the inorganic binder and sludge-like waste generated in a mixer drum is placed at a required location of the construction site with or without a pump. A method for recycling sludge-like waste using a mixer truck. 3. A plant for producing a kneaded product of sludge-like waste and an inorganic bonding agent sucks or introduces the kneaded product into a mixer drum of a concrete mixer truck, and the mixer truck is operated on the way to a construction site. Stir the kneaded material of the sludge-like waste and the inorganic bonding agent in the mixer drum, and place the kneaded material in the mixer drum at a required location on the construction site that has arrived with or without a pump. A method for recycling sludge-like waste using a concrete mixer truck. 4. A sludge-like waste and an inorganic binder are sucked into a mixer drum of a concrete mixer truck at a construction site, and the sludge-like waste and the inorganic binder are mixed in the mixer drum at this construction site. Done,
Sludge using a concrete mixer truck, in which a kneaded material of the inorganic binder and sludge-like waste generated in a mixer drum is placed at a required location of the construction site with or without a pump. Of recycling waste waste. 5. A vehicle for producing raw concrete or mortar from sludge-like waste as a resource for recycling, a vacuum pump for sucking air in a mixer drum to reduce the pressure in the drum, and the mixer. A flexible hose connected to the drum for sucking in and introducing the inorganic binder and / or sludge-like waste is provided, and the inorganic binder and the sludge-like waste are kneaded in the mixer drum to prepare fresh concrete or A concrete mixer truck provided with a kneading blade for producing mortar. 6. A pressure feed pump connected to the mixer drum for driving the kneaded material of the inorganic binder and sludge-like waste in the mixer drum to a required location on the construction site, and a flexible pump connected to the pump. The concrete mixer truck according to claim 5, further comprising a flexible hose.