JP3241420U - Recycled concrete and its manufacturing facility - Google Patents

Abstract

A highly practical recycled concrete and its manufacturing facility are provided. SOLUTION: Recycled concrete is composed of crushed concrete 1 obtained by crushing waste concrete C, cement 2 and liquid 3. [Selection drawing] Fig. 3

Description

The present invention relates to recycled concrete and its manufacturing facilities.

Conventionally, it has been a problem how to dispose of the waste concrete generated in the demolition work of concrete structures.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and provides a highly practical recycled concrete and its manufacturing facility.

The gist of the present invention will be described with reference to the accompanying drawings.

The recycled concrete is characterized by comprising crushed concrete 1 obtained by crushing waste concrete C, cement 2 and liquid 3.

The recycled concrete according to claim 1 is characterized in that the crushed concrete 1 has a particle size of 40 mm or less.

Further, in the recycled concrete according to any one of claims 1 and 2, the liquid 3 is a liquid containing water.

Further, in the recycled concrete according to any one of claims 1 and 2, the crushed concrete 1 is obtained by crushing waste concrete C washed with natural water such as spring water or rainwater. It relates to recycled concrete.

Further, in the recycled concrete according to claim 3, the crushed concrete 1 is obtained by crushing waste concrete C washed with natural water such as spring water or rainwater. is.

Further, the manufacturing facility for manufacturing recycled concrete according to claim 1, further comprising: a water reservoir 10 for storing natural water such as spring water and rainwater; 20b and an arrangement space 20a for arranging the waste concrete C; a water sprinkling unit 21; a sedimentation separation unit 23 for precipitating and separating sewage that flows out when the waste concrete C is washed by water sprinkling from the first water sprinkling unit 21 into a supernatant liquid W1 and a sediment S; It consists of a concrete crushing section 31 for crushing the waste concrete C washed by water spraying from the water sprinkling section 21 and a sieving section 32 for sorting the crushed concrete 1 crushed by the concrete crushing section 31 into a predetermined particle size. A waste concrete crushing unit 30, a second sprinkler unit 34 for spraying the water W of the water reservoir 10 to the concrete crushing unit 31 and the sieve unit 32, and the crushed concrete obtained in the waste concrete crushing unit 30. 1. A recycled concrete production facility characterized by having a recycled concrete production unit 40 for mixing the cement 2 and the liquid 3 to produce recycled concrete RC.

Further, in the recycled concrete manufacturing facility according to claim 6, an unnecessary matter removing section for removing unnecessary matter from the crushed concrete 1 is provided between the concrete crushing section 31 and the sieving section 32. It relates to a recycled concrete manufacturing facility characterized by

Since the present invention is configured as described above, it is possible to increase the value of waste concrete, thereby providing a very practical recycled concrete and its manufacturing facility.

FIG. 2 is a flow diagram showing a manufacturing process of recycled concrete RC according to the present embodiment. 1 is an explanatory diagram of a recycled concrete manufacturing facility according to an embodiment; FIG. 1 is an explanatory diagram of a recycled concrete manufacturing facility according to an embodiment; FIG. It is an explanatory view of a paved road P formed of recycled concrete RC according to the present embodiment.

A preferred embodiment of the present invention will be briefly described with reference to the drawings showing the operation of the present invention.

The present invention is a recycled concrete composed of crushed concrete 1 obtained by crushing waste concrete C, cement 2 and liquid 3, and ordinary concrete (raw concrete made by mixing cement and water with aggregates such as sand and gravel). It has excellent strength and durability comparable to concrete).

Therefore, it is possible to effectively utilize the waste concrete C, which has been mostly discarded in the past, and increase the value of the waste concrete C.

A specific embodiment of the present invention will be described with reference to the drawings.

This embodiment is a recycled concrete RC composed of crushed concrete 1, cement 2, and liquid 3, which are provided by crushing waste concrete C. As shown in FIG.

In this embodiment, as the waste concrete C, waste concrete C (concrete mass) generated in the demolition work of a concrete structure made of ordinary concrete is used. Although the recycled concrete RC is used to form the paved road P, its uses are not limited to this, but are wide-ranging.

The recycled concrete RC according to the present embodiment is manufactured in a recycled concrete manufacturing facility (hereinafter referred to as "facility") having the following configuration.

This facility is constructed in an area where spring water flows from the ground, and has a water reservoir 10 for storing natural water W such as spring water and rainwater, and a transport vehicle (dump truck) for transporting waste concrete C from the outside. The water W of the water reservoir 10 is sprinkled on the waste concrete arrangement part 20 consisting of the passage part 20b for entering and exiting the vehicle and the arrangement space 20a for arranging the waste concrete C, and the passage part 20b for the vehicle and the arrangement space 20a. a first water sprinkling unit 21; A waste concrete crushing unit comprising a concrete crushing unit 31 for crushing the waste concrete C washed by water spraying from the water sprinkling unit 21 and a sieving unit 32 for sorting the crushed concrete 1 crushed by the concrete crushing unit 31 into a predetermined particle size. A processing unit 30, a second water sprinkling unit 34 that sprinkles water W from the water reservoir 10 to the concrete crushing unit 31 and the sieving unit 32, and crushed concrete 1, cement 2 and liquid 3 obtained in the waste concrete crushing unit 30. and a recycled concrete production unit 40 for mixing and producing recycled concrete RC.

Specifically, as shown in FIG. 2, the water reservoir 10 is constructed by providing a top-opening tank having a predetermined capacity at a high location in the facility. Spring water introduction passage 11 (trough) extending from a portion where spring water is generated is continuously installed to store spring water, and furthermore, rain water is also stored by opening the upper part. .

Therefore, clean natural water W such as spring water or rain water is always stored in the water reservoir 10. - 特許庁

Further, the water reservoir 10 is provided with a water conveying section 12 for conveying spring water to a first water spraying section 21 of the waste concrete placement section 20 and a second water spraying section 34 of the waste concrete crushing processing section 30, which will be described later. there is

As shown in FIG. 2, the water conveying section 12 is constructed by providing a water conveying pipe 12a extending from the water reservoir 10 and having a pump 12b. It branches at a position, and each branched tip is connected to the first water spray part 21 and the second water spray part 34 .

As shown in FIG. 2, the waste concrete placement section 20 is constructed by providing a placement space 20a in which a pile of waste concrete C can be placed under the water reservoir 10 described above. A possible vehicle passage portion 20b is provided adjacently, and is configured to discharge waste concrete C from the transport vehicle and arrange it in a heaped state.

The waste concrete placement portion 20 is also provided with a first water spraying portion 21 for spraying water from the water reservoir 10 toward the placement space 20a and the vehicle passage portion 20b.

As shown in FIG. 2, the first water spraying part 21 is constructed by providing a water spraying part 21a (nozzle part) for spraying water W in the form of a shower above the installation space 20a and the vehicle passage part 20b. The water injection portion 21a is connected to the water conveying pipe 12a.

By sprinkling the water W of the water reservoir 10 from the first water sprinkling part 21, the waste concrete C piled up in the installation space 20a is washed (mainly the dirt adhering to the waste concrete C is removed). In addition, it is possible to prevent, as much as possible, scattering of dust that occurs during the carrying-in operation of the carrier vehicle entering the vehicle passage portion 20b.

Therefore, since the washing of the waste concrete C and the prevention of dust scattering around the work space are performed by using natural water W (spring water or rainwater) instead of tap water or chemicals, the cost is low and the environment is environmentally friendly. also kind.

In addition, the waste concrete placement unit 20 is provided outdoors where rainwater (precipitation) hits the waste concrete C placed in the placement space 20a. The waste concrete C is washed not only by the water in part 10) but also by direct contact with rainwater (precipitation).

Further, the installation space 10a of the waste concrete installation portion 20 and the vehicle passage portion 20b both have a gradient of water flow, and sewage generated by water spraying from the first water spraying portion 21 is located downstream of this gradient of water flow. A drainage channel portion 22 for draining (muddy water) is provided. In addition, the drainage channel section 22 may be connected to the waste concrete crushing processing section 30 to be described later so as to drain the water that is sprinkled from the second water spray section 34 and flows out.

In addition, a sedimentation separation section 23 is provided at a downstream position of the drainage channel section 22 to sedimentate and separate dirty water into clean water.

This sedimentation separation unit 23 has a plurality (three) of sedimentation tanks 23a arranged in parallel in multiple stages. It is configured as a cascade system configured to be separated into sediment S (earth and sand) and gradually become clear water. The supernatant liquid W1 generated in the sedimentation separation unit 23 is discharged into a river or the like, and the sediment S (earth and sand) is discarded. The supernatant liquid W1 generated in the sedimentation separation section 23 may be returned to the water reservoir section 10.

The waste concrete crushing unit 30 is composed of a concrete crushing unit 31 for crushing the waste concrete C and a sieve unit 32 arranged in parallel with the concrete crushing unit 31 for sorting out the size of the crushed concrete 1 .

The concrete crushing unit 31 is a crusher in which one or both rotating crushing blades are provided at opposing positions. is configured to take place.

In the primary crushing, the washed waste concrete C brought from the waste concrete arrangement section 20 is crushed to a size of about 100 mm. configured to crush.

In this embodiment, the crushing blade of one concrete crushing unit 31 is adjusted to perform primary crushing and secondary crushing, but it is also possible to prepare for primary crushing and secondary crushing.

In addition, a crushed concrete conveying unit 33 (conveyor unit) for conveying the crushed crushed concrete 1 is provided at the discharge unit of the concrete crushing unit 31, and the crushed concrete conveying unit 33 is provided at an intermediate position (concrete crushing unit 31 and An unnecessary matter removal section (not shown) is provided between the sieving section 32).

This undesired matter removing section is configured to magnetically attract metal objects (mainly reinforcing bars) from the crushed concrete 1 crushed by the primary crushing and secondary crushing and transported by the crushed concrete conveying part 33 .

Therefore, metal objects are magnetically attached to and removed from the crushed concrete 1 conveyed by the crushed concrete conveying unit 33, and other unnecessary substances such as wood chips are manually removed from the crushed concrete 1 conveyed by the crushed concrete conveying unit 33. will be removed.

The sieve unit 32 is provided downstream of the crushed concrete conveying unit 33 as shown in FIG. It is configured to perform a primary sorting in which the crushed concrete 1 is sorted by squeezing and sorting, and a secondary sorting in which the crushed concrete 1 having a size of 40 mm or less after secondary crushing is sorted and obtained.

Further, the waste concrete crushing section 30 is provided with a second water spraying section 34 for spraying the water W of the water reservoir 10 toward the concrete crushing section 31 and the sieve section 32 .

As with the first water spraying unit 21 described above, the second water spraying unit 34 has a water spraying unit 34a ( A nozzle portion) is provided, and the water conveying pipe 12a described above is connected to the water injection portion 34a.

By spraying the water W of the water reservoir 10 from the second water sprayer 34, it is possible to prevent the dust generated during processing in the concrete crusher 31 and the sieve 32 from scattering to the surroundings.

Therefore, the dust is prevented from scattering around the work space in the waste concrete crushing unit 30 by using natural water W (spring water or rainwater) instead of tap water or chemicals, which is low cost and natural. Environmentally friendly.

As shown in FIG. 3, the recycled concrete production section 40 includes a crushed concrete placement section 40b for disposing the crushed concrete 1 obtained in the waste concrete crushing treatment section 30, a cement storage section 40c for storing the cement 2, and a liquid 3 (liquid including water), and a concrete mixer 40a for kneading crushed concrete 1, cement 2 and liquid 3.

Therefore, in the recycled concrete manufacturing unit 40, an appropriate amount of crushed concrete 1 is supplied from the crushed concrete arrangement unit 40b, an appropriate amount of cement 2 is supplied from the cement storage unit 40c, and an appropriate amount of liquid 3 is supplied from the liquid storage unit 40d to the concrete mixer 40a. and this concrete mixer 40a
to produce recycled concrete RC (wet concrete).

Reference numeral 50 is an agitator vehicle for transporting the recycled concrete RC kneaded by the concrete mixer 40 .

A manufacturing process of recycled concrete RC in the facility having the above configuration will be described (see the flow in FIG. 1).

First, the waste concrete C is collected and washed.

Specifically, for example, the waste concrete C is transported from the demolition work site of the concrete structure to the facility by a transport vehicle, and placed in the waste concrete placement section 20 (placement space 20a). At the time of carrying-in by the transport vehicle, the water W (the water in the water reservoir 10) is sprinkled from the first water spraying part 21 to the vehicle passage part 20b to prevent dust from scattering to the surroundings.

In addition, after placing the waste concrete C in the waste concrete placement section 20 (placement space 20a), it is left for about one month (in an open-air state). Water is sprayed from one water sprinkling unit 21 to wash the surface, and rainwater (precipitation) also wash the surface. The sewage (muddy water) generated by watering and rainwater (precipitation) from the first watering section 21 flows through the drainage channel section 22 to the sedimentation separation section 23, whereupon the supernatant water W1 and the sediment S (earth and sand) are mixed. processed separately.

Next, the washed waste concrete C is moved to the waste concrete crushing unit 30 and crushed.

Specifically, the waste concrete C is crushed (primary crushing) to about 100 mm in the concrete crushing unit 31, unnecessary substances (mainly metal objects such as reinforcing bars and wood scraps) are removed from the crushed concrete 1, and the sieving unit 32 Sorting is performed, and those with a particle size of about 100 mm or less are subjected to secondary crushing, and those with a particle size of greater than 100 mm are subjected to primary crushing again. Unnecessary matter may be removed again from this primary crushed material.

Subsequently, the primary crushed crushed concrete 1 is crushed (secondary crushed) to 40 mm or less in a concrete crushing unit 31, unnecessary materials (mainly metal objects such as reinforcing bars and wood scraps) are removed from the crushed concrete 1, and a sieve unit 32 A sorting operation is carried out in , and those with a particle size of 40 mm or less are treated as recycled aggregates, and those with a particle size of more than 40 mm are subjected to secondary crushing again. Unnecessary matter may be removed again from the secondarily crushed material.

Further, while the waste concrete crushing unit 30 (concrete crushing unit 31 and sieving unit 32) is processing, water is sprayed from the second water spray unit 34 to prevent dust from scattering to the surroundings.

Subsequently, in the recycled concrete manufacturing unit 40, the crushed concrete 1 (recycled aggregate) having a particle size of 10 mm or more and 40 mm or less obtained in the waste concrete crushing unit 30 is mixed with cement 2 and liquid 3 containing water. A recycled concrete RC is provided. The liquid 3 containing water may be tap water or the water W in the water reservoir 10 described above.

The mixing ratio of the crushed concrete 1, the cement 2 and the liquid 3 is the same as that of the above-mentioned ordinary ready-mixed concrete (ready-mixed concrete in which cement and water are mixed with an aggregate such as sand or gravel). Crushed concrete 7:cement 1:liquid 0.5. Of course, any effective ratio suitable for other uses may be adopted as appropriate.

The recycled concrete RC obtained through the above steps is stored in an agitator vehicle 50, transported to a construction site, and applied to the formation of a paved road P, for example. In FIG. 4, (a) is the recycled concrete RC before hardening, and (b) in FIG. 4 is the recycled concrete RC after hardening.

Since the present embodiment is configured as described above, the waste concrete C can be effectively utilized. It has excellent strength and durability comparable to ready-mixed concrete (mixed concrete with cement and water), is useful in terms of cost, and has extremely high commercial value.

Therefore, according to the present embodiment, it is possible to effectively utilize the waste concrete C, which has been mostly disposed of in the past, and increase the value of the waste concrete C.

Further, in this embodiment, since the crushed concrete 1 has a particle size of 40 mm or less, the above-described functions and effects can be certainly achieved, and the handling is easy and the cost is excellent.

In addition, in this embodiment, the liquid 3 is a liquid containing water, so that the above-described effects can be reliably achieved in this respect as well.

In this embodiment, the crushed concrete 1 is obtained by crushing the waste concrete C washed with natural water W such as spring water or rain water. and rainwater), it is low cost and environmentally friendly.

It should be noted that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

C Waste concrete RC Recycled concrete S Sediment W Water W1 Supernatant liquid 1 Crushed concrete 2 Cement 3 Liquid
10 Water reservoir
20 Waste concrete placement section
20a installation space
20b Vehicle Passage
21 No. 1 Sprinkler
23 Sedimentation Separation Section
30 Waste concrete crushing section
31 Concrete Breaker
32 Sieve
34 Second Sprinkler
40 Recycled Concrete Manufacturing Dept.

Claims (7)

A recycled concrete comprising crushed concrete obtained by crushing waste concrete, cement and liquid. 2. The recycled concrete according to claim 1, wherein said crushed concrete has a particle size of 40 mm or less. 3. The recycled concrete according to claim 1, wherein said liquid is a liquid containing water. 3. The recycled concrete according to claim 1, wherein the crushed concrete is obtained by crushing waste concrete washed with natural water such as spring water or rainwater. . 4. The recycled concrete according to claim 3, wherein said crushed concrete is obtained by crushing waste concrete washed with natural water such as spring water or rain water. 2. A manufacturing facility for manufacturing recycled concrete according to claim 1, comprising a water reservoir for storing natural water such as spring water and rainwater, a passage for vehicles through which a transport vehicle for transporting the waste concrete enters, and the waste concrete. a waste concrete arrangement section consisting of an arrangement space for arranging a waste concrete arrangement section, a first sprinkler section for sprinkling water from the water reservoir onto the vehicle passage section and the arrangement space, and water sprayed from the first sprinkler section a sedimentation separation unit that sediments and separates waste water flowing out by washing the waste concrete into a supernatant liquid and a sediment; and a sieving unit for sorting the crushed concrete crushed by the concrete crushing unit into a predetermined particle size, and the water from the water reservoir is sprinkled on the concrete crushing unit and the sieving unit. and a recycled concrete manufacturing unit for manufacturing recycled concrete by mixing the crushed concrete obtained in the waste concrete crushing unit, the cement, and the liquid. 7. The facility for manufacturing recycled concrete according to claim 6, wherein an unnecessary material removing section for removing unnecessary materials from the crushed concrete is provided between the concrete crushing section and the sieving section. Recycled concrete manufacturing facility.

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