JP2005342558A - Facility for regeneration of return ready-mixed concrete and method of managing regenerated aggregate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attempt to reuse e.g. aggregate from ready-mixed concrete or utilizing the aggregate again as a resource by carrying out dry treatment of the aggregate. <P>SOLUTION: A facility for regeneration of return ready-mixed concrete consists of a stock yard 3 maturing the concrete and aggregate-regenerating equipment 12 recovering aggregate and so on. The equipment 12 consists of a crusher 5, a sizing machine 7 and a sieving machine 9. The sieving machine 9 sorts regenerated coarse aggregate 10 and regenerated fine aggregate 11. Fine aggregate and mortar can be recovered from the aggregate 11 by using a dry cyclone 30. The stock yard 3 may be equipped with a car-washing area 35, an aggregate-recovering apparatus 37, a dehydrating machine 54, etc. A method of managing regenerated aggregate gives regenerated aggregate belonging to the line of the person carrying return ready-mixed concrete by regenerating and recovering the aggregate according to the division standards of the yard 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a recycling raw material recycling facility and a method for managing recycled aggregates, and more particularly, to a recycling and recycling processing technique in which aggregates and the like are recycled from a hardened return raw concrete by dry processing. .

Conventionally, as a recycling apparatus for this type of aggregate for concrete, for example, a return raw container from a mixer truck uses a rotating sieve and a water pusher provided on a drainage receptacle, and a vibrating screen at a drainage outlet. Some are supplied to aggregate recovery devices such as machine and trommel classifiers.
In other words, it is a wet type device, the presence of sludge water is unavoidable, contrary to resource saving due to a significant increase in the amount of industrial water used, and when this sludge water is stored in a concentration tank and reused However, due to the concentration of sludge water, admixture, generation of bubbles, etc., there is a problem that the yield of recycling and reuse is reduced.
Moreover, when the processing capacity in the washing place was exceeded, there was a contradiction in which it was hardened in the place and disposed as industrial waste (for example, see Patent Document 1).
Japanese Patent No. 2753486

The problem to be solved is that it is necessary to use a large amount of industrial water in the wet processing of the return raw concrete, while in the reuse of sludge water, the quality of the kneaded water due to the growth phenomenon of bubbles, etc. It is difficult to secure the properties.
Furthermore, it is said that the returned raw kon returned from the installation site accounts for about 3% of the raw kon shipment, and this effective utilization is an important issue for the raw kon factory.
For this reason, the object of the present invention is basically to solve these problems, and it is also intended to be suitable for reuse and recycling of aggregates and the like that are regenerated from returned raw concrete.

  According to the first aspect of the present invention, there is provided a regeneration raw control facility for a return biocon, which receives the return biocon of an agitator vehicle, cures the stock, and aggregate collects the aggregate and the like from the return biocon cured in the stockyard. A return raw concrete regeneration processing facility equipped with at least a regeneration device, wherein the aggregate regeneration device crushes the hardened small return raw concrete to produce a primary treatment product, and the primary treatment product. The aggregate and the mortar are crushed and separated into the aggregate and the mortar to produce a secondary product, and the secondary processed product is sieved to obtain the recycled coarse aggregate and the mortar. And a sieving machine for classifying the regenerated fine aggregate interposed.

According to the above configuration, the return raw concrete is applied with a dry treatment that can be cured by curing in the stock yard, so that the influence of sludge water is eliminated and the properties of recycled aggregate and the like are constant. The quality level can be maintained. A small portion of the hardened return kon is designed to facilitate the crushing operation.
In addition, the crusher generates a primary processed product of an appropriate size, and the granulator generates a secondary processed product separated into aggregate and mortar by crushing and peeling, so depending on the stage Regeneration processing by smooth continuous work becomes possible.
Furthermore, in the sieving machine, the secondary processed material is classified into coarse aggregate and recycled fine aggregate with mortar interposed. Therefore, the recycled coarse aggregate can be easily recovered, and the recycled fine aggregate with the mortar interposed therebetween can be reused as a void filler that backs up a void portion generated by placing concrete.

In the reproduction | regeneration processing facility of the return biocon according to claim 2, the return biocon is hardened by the curing for 1 to 7 days.
According to the said structure, since the said return raw kon is hardened by the 1st-7th curing, it can process appropriately the disintegration of the return raw kon and peeling of adhesion mortar. In this case, the specification of 1st to 7th is set as an effective value based on the relationship between the passage of time according to the material age and the compressive strength of the concrete, knowledge by the inventors, various experiments, and the like.
The basic idea of the setting is that the lower limit takes into account the separation of the attached mortar that encloses the aggregate, which is regarded as important in the separation of the aggregate and the mortar.
In other words, peeling of the adhered mortar is as easy as younger age, but on the other hand, if it is crushed before curing progresses, it resolidifies. In addition, the upper limit takes into consideration that the compressive strength of the concrete block is not reached from the viewpoint of crushing.

In the regeneration processing facility for return raw com according to claim 3, the granulator includes a first granulator and a second granulator, and the sieve includes a first granulator and a second sieve. The return according to claim 1 or 2, wherein a second sizing machine and a second sieving machine are respectively arranged downstream of the first sizing machine and the first sieving machine. This is a recycling facility for raw concrete.
According to the above configuration, the sizing machine and the sieving machine are divided into the first and second processing machines, so that the first sieving machine collects the regenerated fine aggregate via the mortar, and the second sieving machine. Then, the regenerated coarse aggregate and the regenerated fine aggregate interposing the mortar are recovered by re-sieving.
Therefore, peeling of the adhered mortar, which is an important issue in reprocessing, is further promoted by the crushing and peeling action in the first and second granulators.
In addition, the classification of fine aggregates and mortar in the next process is facilitated, leading to a decrease in the water absorption rate of aggregates, which is a problem with recycled aggregates.

In the reproduction | regeneration apparatus of the return raw container of Claim 4, the said granulator is comprised from the 1st granulator and the 2nd granulator, and a sieving machine is provided in the downstream of the 2nd granulator. The regeneration raw facility for return raw food according to claim 1 or 2, characterized in that.
According to the said structure, the granulator is comprised by the 1st granulator and the 2nd granulator. For this reason, since it can arrange | position and classify | categorize into the model which improved the crushing effect | action, and the model which improved the peeling effect | action, the more stable secondary processed material can be produced | generated.

The return raw concrete regeneration processing facility according to claim 5, wherein a dry cyclone is further provided on the downstream side of the sieving machine. It is a facility.
According to the said structure, the high quality reproduction | regeneration fine aggregate and mortar with which the water absorption rate fell can be collect | recovered by the classification by a dry-type cyclone. For this reason, reuse and recycling of aggregates and the like can be achieved from a comprehensive viewpoint.

According to a sixth aspect of the present invention, there is provided a car wash station that can be used for washing the agitator car in the facility where the stock yard is arranged, following the receipt of the return raw car from the agitator car. It is the reproduction | regeneration processing facility of the return raw container of Claims 1-5 characterized by the above-mentioned.
According to the above configuration, if the cleaned agitator car goes directly to the ready-mix factory, it can be used for loading the ready-mixed food from the state as it is.

7. The return raw concrete recycling facility according to claim 7, wherein the car wash station is provided with an aggregate recovery device for recovering coarse aggregate and fine aggregate from the return raw concrete generated by the car wash. It is a recycling treatment facility for return raw containers described in.
According to the above-described configuration, even if the return raw component remains stuck inside the agitator, all the aggregates and the like are collected, which is suitable for reuse and recycling.

8. The recycling plant according to claim 8, wherein the aggregate recovery device is connected to a dehydrator for producing a dehydrated cake from sludge water generated by a car wash. This is a recycling processing facility for returning raw containers.
According to the said structure, since a dewatering cake is produced | generated from sludge water, it can use effectively together with collection | recovery of a coarse aggregate and a fine aggregate. This is because the dehydrated cake can be reused for roadbed materials.

In the recycling treatment facility of the return biocon according to claim 9, a filter tank containing filtered water is connected to the dehydrator, and the supernatant water in the filter tank is reused for washing the agitator vehicle. It is the return processing container reproduction | regeneration processing facility of Claim 8 characterized by the above-mentioned.
According to the said structure, since the supernatant water in a filtration tank can be reused for the washing | cleaning of an agitator vehicle, the new use of industrial water can be suppressed.

  Moreover, in the management method of the reclaimed aggregate according to claim 10 according to the present invention, the recycle aggregate collected from the return raw material carried in by the agitator car is a reclaimed aggregate management method in which each retaker manages. The importer and the return raw concrete are identified from the vehicle of the agitator vehicle, the type of aggregate in the raw concrete, etc., and the return raw concrete is cured based on the stock yard division prepared for each identified importer. After that, the recycled aggregate is individually delivered, and the recycled aggregate is delivered to the importer specified based on the stockyard classification, so that the quality property is managed to belong to the importer's own system. It is characterized by that.

According to the above configuration, the importer and the return raw component are identified from the vehicle of the agitator vehicle, the type of aggregate in the raw component, etc., and the return raw component is individually regenerated based on the stockyard classification. . For this reason, if the importer picks up the recycled aggregate obtained by the individual processing as it is, it can be recovered as it is as the recycled aggregate belonging to his system.
Therefore, the importer can easily and reliably grasp the quality properties when reusing the recycled aggregate.

The reclaimed raw concrete regeneration processing facility according to the present invention includes a stock yard that stores the hardened return raw concrete, and is provided with a crusher, a granulator, and a sieving machine as an aggregate regenerator disposed in association therewith. . For this reason, it becomes possible to dry-process the return raw concrete, and a large amount of industrial water due to the presence of sludge water is eliminated.
Moreover, since the regenerated coarse aggregate can be recovered with the sieving machine, it can be reused and recycled, and the regenerated fine aggregate via the mortar can also be recovered. This recycled fine aggregate can be used as a void filler as a backfill accompanying the placement of concrete.
Accordingly, it is possible to effectively use the return raw material, and the purpose of reuse and recycling of aggregates and the like is achieved.

  Moreover, the reprocessing facility of the return raw concrete which concerns on this invention can be collect | recovered as a reproduction | regeneration fine aggregate and mortar with which the water absorption rate fell, if the classification process is carried out by the dry cyclone about the reproduction | regeneration fine aggregate which interposed the mortar. For this reason, it can be effectively used as a high-quality recycled fine aggregate and mortar with stable quality properties.

Furthermore, if the regeneration processing facility for return raw containers according to the present invention is provided with a car wash place in the facility where the stock yard is arranged, it becomes possible to use the agitator car for washing following reception of the return containers.
In addition, if the car wash station is provided with an aggregate recovery device, a dehydrator, and a filtration tank, recovery and filtration of coarse aggregate and fine aggregate can be performed also from the returned raw material that remains to stick inside the agitator. The tank can be reused with the supernatant water. For this reason, even if it judges from a comprehensive viewpoint, the objective of reuse and recycling is achieved.

In the re-aggregate management method according to the present invention, the importer and the return raw component are identified from the vehicle of the agitator, the type of the aggregate, etc., and the return raw component is also cured based on the stock yard classification and individually. Playback processing is performed.
Therefore, the recycled aggregate obtained by the individual processing is managed so as to be suitable for the original system of the importer because the quality and properties thereof match.
For this reason, when the returned raw concrete importer receives the delivery of the recycled aggregate, the use and application destination can be selected easily and accurately.

The regeneration processing facility according to the present invention is configured to cure the returning raw concrete by curing for 1 to 7 days in the stock yard, and in the aggregate regeneration device, crush the divided returning raw concrete with a crusher. A primary product is produced. This primary treatment product is crushed and separated by a granulator to produce a secondary treatment product, and this secondary treatment product is classified by a sieving machine to interpose recycled coarse aggregate and mortar. Classified as recycled fine aggregate.
The granulator and the sieving machine are constituted by an arrangement of a first granulator, a first sieving machine, a second granulator, and a second sieving machine, or the first granulator, the second granulator, By comprising by arrangement | positioning of a sieving machine, the crushing of a secondary processed material and a peeling action are accelerated | stimulated more.
If a dry cyclone is connected to the downstream side of the sieving machine, the recycled fine aggregate through the mortar is classified, so that it can be reused as recycled fine aggregate and mortar with reduced water absorption. .
If a car washing place is provided in the facility where the stock yard is arranged, it is possible to use the agitator car for washing following the receipt of the return raw container.
In addition, if this car wash is equipped with an aggregate recovery device such as a trommel classifier, a vibro screen, a dehydrator, a filtration tank, etc., coarse aggregates and fine aggregates will be recovered from the return raw components remaining in the agitator. Recovery, generation and recovery of dehydrated cake, and circulating use of supernatant water into the facility.
Furthermore, in the method for managing recycled aggregate according to the present invention, the importer and the return raw concrete are identified from the vehicle of the agitator vehicle, the type of aggregate in the raw concrete, and the like. The return raw containers are cured based on the stock yard classification prepared for each specified importer and then individually recycled. For this reason, if the recycled aggregates are individually processed and delivered to the importer as they are, the quality characteristics of the recycled aggregates match, so that the recycled aggregate can be managed to suit the original system of the importer.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a return raw container regeneration processing facility according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a conceptual explanatory view showing a return raw control unit according to the first embodiment of the present invention.

<First Embodiment>
The return raw concrete regeneration processing facility of the first embodiment uses the return raw concrete 2 from the agitator vehicle 1 as a raw material, and this return raw concrete 2 is applied with a dry process, so that, for example, 1 Hardens by curing for 7 days. In addition, the agitator vehicle 1 in the present invention refers to a transporting and loading vehicle for raw concrete including a mixer vehicle.
For example, the cured raw raw product 2 is divided into small pieces by, for example, a breaker 4 and then crushed to an appropriate size by a crusher 5 to produce a primary processed product 6.
The stock yard 3 is usually formed on the ground surface, and preferably has a roof to avoid the influence of wind and rain.
The size is, for example, about 14 m (length) × 10 m (width) × 1 m (depth) in the illustrated shape. The wall portion and the bottom portion with the slope are made of iron plate, concrete, etc., and the length portion includes a horizontal distance of 4 m of the inclined surface and is a total of 14 m.
The reason why the breaker 4 is divided is because it is necessary to make the supply to the crusher 5 smooth. For example, the breaker 4 is crushed as a block-shaped small piece 13 of about 30 × 30 cm or less.
The primary treated product 6 is usually made into a particle size of 40 mm or less by the crusher 5 and separated into coarse aggregate, fine aggregate and mortar by the crushing action of the granulator 7, so that the secondary treatment is performed. Object 8 is produced.
In this crushing, it is important that the aggregate and the mortar are separated, that is, the attached mortar existing as a coating surrounding the aggregate is peeled off. This peeling of the adhered mortar can be dealt with not only by simple rotation of the granulator 7, but also by applying a collision force or striking force to the aggregate during rotation, as will be described later.
The secondary processed product 8 is classified by the vibration action of the sieving machine 9 and is collected as the recycled coarse aggregate 10 and the recycled fine aggregate 11 along with this. In this case, the regenerated fine aggregate 11 means a regenerated fine aggregate with mortar interposed in terms of classification and components.
In addition, the recovered recycled fine aggregate can be used as a void filler as a backfill accompanying the placement of concrete.
In the present invention, the aggregate regenerator 12 is configured by the crusher 5, the granulator 7, and the sieving machine 9 being related to each other.

By the way, as for the above-mentioned return raw container, the range of material age 1 day-7 days is suitable as suitable hardness. FIG. 2 is a characteristic diagram showing a relationship of concrete cement concrete strength up to the 28th day of material age.
According to FIG. 2, A (early strong cement), B (ordinary cement), C (blast furnace cement type B) and D (medium heat cement) are selected as representative cements at a water cement ratio of 55%. The compressive strength of concrete is shown.
The compressive strength in the cements A to D increases from the hydration reaction until the 7th day of the material age, and thereafter increases linearly until the 28th day of the material age.
Therefore, in the present invention, the upper limit value of the hardness of the return raw kon is set on the 7th day from the viewpoint of strength development.

In addition, the lower limit value of the hardness of the return raw kon was set on the first day of the material age based on the water absorption rate based on the experimental results shown in the following table. The reason for this is that the quality standard for reclaimed aggregate (draft) <Ministry of Construction Technical Development No. 88 / April 11, 1994> was compiled by the former Ministry of Construction for the water absorption rate. Depending on what needs to be met.
Therefore, in the table, for convenience of comparison, the standard value of “recycled aggregate quality” based on the above-mentioned quality standard (draft) is clearly shown.

In the experiments shown in the above table, the raw material used is a recycled raw mix with a water cement ratio of 55% composed of ordinary Portland cement, coarse aggregate (2005) and fine aggregate from the viewpoint of stability required for recycled aggregate. doing. In addition, a 2m (length) x 2m (width) x 0.25m (depth) wooden formwork is prepared as a stock yard for containing this raw material, and is housed for each material age and cured in a stationary state. did.
The raw material cured for each material age was divided into block shapes of about 30 × 30 cm or less using a breaker, and this was put into a crusher and crushed to a particle size of 40 mm or less.
These primary treated products were divided into predetermined amounts, and each sample was prepared by crushing and peeling for 1 to 5 minutes with a bucket-type granulator having a horizontal rotor described later.
Each crushed sample is classified using a wooden frame sieve (20 mm and 5 mm) based on the standard of the screening test method (JIS A 1102), and a particle size of 20 to 5 mm is coarse aggregate and a particle size of 5 mm or less. Fine aggregate P was designated. In addition, since the fine aggregate P has not been classified by the dry cyclone, two kinds of comparisons were used as comparison targets.
As a result, all of the return processing containers according to the present invention were adapted to the standard values defined by the quality of the recycled aggregate described above, and the effectiveness of the present invention was confirmed. In addition, since the fine aggregate Q is classified by a dry cyclone which will be described later, one kind having a low water absorption rate was set as a comparison target, but it shows a lower value than the fine aggregate P and conforms to the reference value. It is the result.

Moreover, about the water absorptivity, the measurement result of the average value of a 2 times test was described according to the density and the water absorptivity test method (fine aggregate: JIS A 1109, coarse aggregate: JIS A 1110).
Furthermore, when the material age was less than 1 day, the material of 18 hours of material age was separately compared, but the water absorption rate was more than the reference value, and it was confirmed that the setting of the lower limit value of the present invention was appropriate.
In addition, in the said table | surface, although the water absorptivity on the material age 28 which deviates from an upper limit was described as a comparative product, the coarse aggregate was 3.68% and the fine aggregate P was 11.89%. Also in this respect, it was confirmed that the setting of the upper limit value of the present invention is appropriate.

Further, each sample was measured not only for water absorption but also for surface dry density (g / cm ³ ), absolute dry density (g / cm ³ ), and fine particle fraction (%), and all showed appropriate numerical values.
Moreover, about the particle size range, it was confirmed that it was very small compared with the reference value (0.2 or more impossibility) in the fluctuation of the coarse particle ratio, and was sufficiently within the appropriate range.

An example of the supply means for the small pieces 13 to the crusher 5 and the primary processed material 6 to the granulator 7 is shown in FIGS. 3 (a) and 3 (b), respectively.
The small pieces 13 shown in FIG. 3A are carried out by the feeder 16a and supplied into the crusher 5 when an appropriate amount, for example, about 2 to ³ m ^{3 is} put into the hopper 15a by the tire shovel 14a. The
Further, the primary processed product 6 shown in FIG. 3B is introduced into the hopper 15b by the tire shovel 14b, and is fed into the granulator 7 by the feeder 16b at an appropriate amount.

Second Embodiment
Next, a second embodiment of the present invention will be described. Components similar to those in the first embodiment described above are denoted by the same reference numerals, and description thereof will be omitted or simplified. FIG. 4 is a conceptual explanatory view showing a return raw control unit according to the second embodiment of the present invention.
In the regeneration processing facility for return raw containers according to the second embodiment, the difference from the first embodiment is that the granulator 7 and the sieve 9 are configured to perform primary processing and secondary processing, respectively. It is in.
That is, the granulator includes a first granulator 7a and a second granulator 7b, and the sieving machine includes a first sieving machine 9a and a second sieving machine 9b. In this case, the first sieving machine 9a is disposed on the downstream side of the first granulating machine 7a, and the second sieving machine 9b further crushes the residue discharged from the first sieving machine 7a, Separate into the aggregate and mortar.
According to FIG. 4, the secondary processed material 8a processed by the 1st granulator 7a is applied to the 1st sieve 9a, and is collect | recovered as the reproduction | regeneration fine aggregate 11a which interposed the mortar. Further, the residue of the first sieving machine 7a is crushed and peeled off by the second granulator 7b to produce a secondary processed product 8b made of aggregate and mortar.
Next, the secondary processed product 8b is recovered as a recycled fine aggregate 11b with the recycled coarse aggregate 10 and mortar interposed by being passed through the second sieving machine 9b.
The recycled coarse aggregate 10 and the recycled fine aggregates 11a and 11b are carried out to necessary places by using an appropriate tire shovel and a transport truck (not shown). The recycled fine aggregates 11a and 11b can be used as a gap filler as described above.
Therefore, the aggregate regeneration apparatus 12 according to the second embodiment is configured by the crusher 5, the first and second sizing machines 7a and 7b, and the first and second sieving machines 9a and 9b, from the configuration and functions described above. The

FIG. 5 is a conceptual explanatory view of the main part showing a modified embodiment from the viewpoint of further enhancing the crushing action and the peeling action.
According to FIG. 5, the sizing machine 7 and the sieving machine 9 are configured such that the sizing machine 7 includes a first sizing machine 7 a and a second sizing machine 7 b, and the sieving machine 9 includes the second sizing machine. It is arranged downstream of the machine 7b.
This is because the first granulator 7a applies a model with an improved crushing function, and the second granulator 7b applies a model with an enhanced exfoliation function, so that the crushing / peeling action is effective. This is because an appropriate secondary processed product 8 can be generated.
In addition, according to FIG. 5, the 1st granulator 7a and the 2nd granulator 7b are what has a continuous structure, and the thing by which the secondary processed material 8 is produced | generated by the 2nd granulator 7b is shown. Yes.
However, since the capacity of the first granulator 7a is reduced as compared with the time when the primary treatment product 6 is charged, the first granulator 7a may be applied to the second granulator 7b after stocking an appropriate amount.
In the recovery raw material recycling facility configured as described above, the coarse aggregate 10 and the fine aggregate 11 with the mortar interposed are collected.

Further, in the present invention configured as described above, the granulator 7, 7a, 7b needs to be separated into coarse aggregate, fine aggregate and mortar when the primary treatment product 6 is crushed. In particular, the peeling action of the adhesive mortar on the aggregate is an important matter.
For this reason, FIGS. 6A and 6B are conceptual diagrams illustrating the peeling action in the granulator 7 with respect to the attached mortar 18 that wraps the typical aggregate 17. In this case, FIG. 6A is a sectional view from the front side, and FIG. 6B is a plan view from above.

6 (a) and 6 (b), the granulator 7 includes a vertical rotor 21 that can rotate both in the granulator main body 20, and the upper portion of the rotor 21 is indicated by arrows and is in three directions. A protruding portion 23 is provided so as to constitute the groove portion 22. In addition, an inclined wall 25 is formed on the outer peripheral side of the rotor 21 via a discharge space 24.
A dead stock 26a is formed on both side surfaces of the groove, and a dead stock 26b (only a part of which is shown) is formed on the inclined wall 25 by triangular ridges.
According to the granulator 7, the adhering mortar 18 enclosing the aggregate 17 is put into the dead stock 26a of the groove portion 22 when the aggregate 17 is input from the input port 27 above the rotor 21. And when it is blown in the circumferential direction by centrifugal force, it collides with the dead stock 26b of the inclined wall 25.
As a result, the adhered mortar 18 is peeled and crushed from the aggregate 17 and discharged downward from the discharge space 24.

FIG. 7 shows the granulator 7 including a horizontal rotor 21 in the bucket-shaped granulator body 20. The granulator 7 of this type is applied in the above-described experiment, and is implanted in the outer peripheral portion of the rotor 21 so that the crushing blade 28 protrudes. As the arrangement of implantation, a spiral shape or a staggered shape is applied.
That is, the granulator 3 required in the present invention is not based on a simple crushing method by rotation. In crushing the primary treatment product 6, not only the rotational action but also the primary treatment product 6 A method in which a collision force or a striking force is added to the sway is applied.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. The same components as those in the first embodiment and the second embodiment described above are denoted by the same reference numerals, and description thereof will be omitted or simplified. FIG. 8 is a conceptual explanatory diagram showing a return raw control unit according to the third embodiment of the present invention.
The regeneration processing facility for return raw containers according to the third embodiment relates to the granulator 7 and the sieve 9 described above, and a dry cyclone 30 is connected to the downstream side of the sieve 9.
That is, the recycled fine aggregate 11 recovered from the sieving machine 9 is classified into the recycled fine aggregate 31 and the mortar 32 having a reduced water absorption rate by the dry cyclone 30.
The use of the dry cyclone 30 is to reduce the water absorption rate of the regenerated fine aggregate 11. With this, the quality properties of the regenerated fine aggregate 31 are improved, and the quality criteria (draft) of the regenerated aggregate described above. It is to satisfy.

FIG. 9 is a schematic explanatory diagram showing a flowchart for generating recycled coarse aggregate, recycled fine aggregate, and mortar from raw materials in carrying out the first embodiment and the third embodiment.
In FIG. 9, if it demonstrates with reference to FIG.1 and FIG.8, in the 1st process, it will crush, after hardening the return biocon 2 as a raw material, and by making the hardened return biocon 2 into a 2nd part in a 2nd process. By doing so, the primary treated product 6 is generated.
In the third step, the primary processed product 6 is subjected to the action of crushing and peeling by the granulator 7, and is generated as a secondary processed product 8 separated into aggregate and mortar.
In the fourth step, the secondary processed product 8 is classified by the sieving machine 9 to be classified into the recycled coarse aggregate 10 and the recycled fine aggregate 11 with mortar interposed therebetween, and is recovered. The recycled fine aggregate 11 can be effectively used as a gap filler for concrete as it is.

  Further, the fifth step corresponds to FIG. 8 described above, but since the recycled fine aggregate 11 is subjected to the classification treatment by the dry cyclone 30, the high quality recycled fine aggregate 31 with improved quality properties and It is recovered as mortar 32. As a result, the purpose of reuse and recycling can be achieved even when judged from the overall viewpoint.

<Fourth embodiment>
Moreover, although 4th Embodiment of this invention is described, the same code | symbol is attached | subjected to the component similar to 2nd Embodiment mentioned above, and description is abbreviate | omitted or simplified. FIG. 10 is an explanatory view of a conceptual main part showing a return raw-con recycling processing facility according to the fourth embodiment of the present invention.
In the recycling processing facility for return raw containers according to the fourth embodiment, the parts related to the stockyard 3 and the crusher 5 are omitted, and the second sizing is performed with respect to the first sizing machine 7a and the first sieving machine 9a as the main parts. A machine 7b and a second sieving machine 9b are connected, and a dry cyclone 30 is provided downstream of the second sieving machine 9b.
That is, the difference from the second embodiment shown in FIG. 4 is that a dry cyclone 30 is provided on the downstream side of the second sieving machine 9b.
In the illustrated case, the recycled coarse aggregate 10, the recycled fine aggregate 31, and the mortar 32 are shown to be carried out to a necessary location using an appropriate tire shovel 14 and a transport truck 33. Has been.
However, this dry-type cyclone 30 is connected to the first sieving machine 9a and the second sieving machine 9b, respectively, and from the recycled fine aggregates 11a and 11b recovered by the first sieving machine 9a and the second sieving machine 9b, It is possible to classify the recovered fine aggregate 31 and mortar 32 that have been reduced and recover them.

FIG. 11 is a schematic explanatory diagram showing a flowchart created based on FIGS. 4 and 10 in carrying out the second embodiment and the fourth embodiment. Since FIG. 11 has the same part as FIG. 9 and the overlapping part, description of these parts is omitted or simplified.
11 differs from FIG. 9 in that secondary processed products 8a and 8b are generated as shown in the third step and the fourth step.
That is, in the third step, the primary processed product 6 supplied to the first granulator 7a becomes a secondary processed product 8a by crushing and peeling, and this secondary processed product 8a is obtained by the first sieving machine 9a. By classifying, the recycled fine aggregate 11a is recovered, and the remaining portion is sent to the second granulator 7b.
In the fourth step, the secondary processed product 8b crushed and separated by the second granulator 7b is classified by the second sieving machine 3b, whereby the recycled coarse aggregate 10 and the recycled fine aggregate 11b. As recovered.
The recycled coarse aggregate 10 recovered in this way contributes to reuse and recycling, but the recycled fine aggregates 11a and 11b recovered by the primary sieving machine 9a and the secondary sieving machine 9b also remain as they are. It can be used as a void filler for casting concrete.
Further, as shown in the fifth step, the recycled fine aggregates 11a and 11b are classified and recovered as recycled fine aggregates 31a and 31b and mortars 32a and 32b having a reduced water absorption rate by the treatment with the dry cyclone 30 as shown in the fifth step. You can also.

<Fifth Embodiment>
Furthermore, although 5th Embodiment of this invention is described, FIG. 12 is explanatory drawing of the conceptual principal part which shows the reproduction | regeneration processing facility of the return raw container which concerns on 5th Embodiment of this invention.
A feature of the recycling processing facility for return raw containers according to the fifth embodiment is that a car wash 35 is provided in the facility where the stock yard 3 is disposed.
In this facility, the agitator car 1 performs services such as cleaning inside and outside the agitator at the car wash garage 35 after receiving the return raw container 2 returned from the concrete placement site into the stock yard 3. It can be received.
For this reason, since the agitator vehicle 1 continues to the cleaning operation as it is, the operation can be performed smoothly, and in the ready-mix factory, the ready-mixer can directly participate in the loading operation of the ready-mixed container, thereby improving the ability to carry out the ready-mixed container.

  Further, the car wash place 35 may be provided with an aggregate recovery device, for example, a trommel classifier 37a as shown in the figure via a car wash chute 36. In this facility, since the coarse aggregate 38a and the fine aggregate 39a can be recovered from the return raw material remaining after the cleaning of the agitator vehicle 1, it contributes to reuse and recycling for completeness. In this case, the agitator wheel 1 can be cleaned by an appropriate water supply conduit 35a.

Further, in FIG. 13, a vibro screen 37 b having a function of vibrating sieve is applied as an aggregate recovery device, and the supernatant water in the supernatant tank 40 can be circulated and used in the facility via the transfer pipe 41. ing.
And the wash water which goes to the car wash chute | shoot 36 is stored by the water collection tank 42 via the vibro screen 37b. In this case, since the sprinkling branch pipe 43a from the transfer pipe 41 extended to the supernatant tank 40 is provided on the upper part of the vibro screen 37b, the coarse aggregate 38b can be collected by the conveyor 44.
The agitator wheel 1 can be cleaned by branch pipes 43b and 43c from the transfer pipe 41 when cleaning the interior, side surfaces, cargo bed, and the like. This can be done with the tube 45. In addition, if the branch pipes 43a and 43b are provided with a timer 46, the watering time can be controlled.
The washing water stored in the water collecting tank 42 is supplied into the fine aggregate cyclone 49 through the transfer pipe 48 connected to the submersible pump 47a. In the fine aggregate cyclone 49, the supernatant water is returned to the car wash chute 36 through the return conduit 50, and the fine aggregate 39 b is recovered through the crasher 51.
The overflow water from the classifier 51 is accommodated in a settling tank 52, and the overflow water and the wash water stored in the settling tank 52 are added to the supernatant through the second submersible pump 47b and the transfer pipe 53. It is pumped to the tank 40.
The supernatant water in the supernatant tank 40 can be circulated and used as cleaning water for the agitator vehicle 1 or the like in the facility using the third submersible pump 47c and the transfer pipe 41.

<Sixth Embodiment>
Furthermore, although the sixth embodiment of the present invention will be described, the same components as those in the fifth embodiment described above are denoted by the same reference numerals, and description thereof will be omitted or simplified. FIG. 14 is a conceptual explanatory diagram showing a return raw control unit according to the sixth embodiment of the present invention.
The regenerative processing facility according to the sixth embodiment is greatly different from the facility of the fifth embodiment in that it includes a sludge tank 56 having stirring blades 55, and the sludge water in the sludge tank 56 is a submersible pump. 47b and the transfer pipe 53 are to be pumped to the dehydrator 54.
The dehydrator 54 includes a filter member 57a between the receiving plate 56a and the push plate 56b, and a dehydrated cake 58 is generated by the compression operation of the push plate 56b.
Then, the filter cloth of the filter member 57 is washed by the backwash device 57 b, and the filtered water containing the squeezed water is accommodated in the filtered water tank 59.
Further, the supernatant water in the filtered water tank 59 is reused for cleaning the agitator wheel 1 and the like using the third submersible pump 47c and the transfer pipe 41. The dewatered cake 58 generated by the dehydrator 54 can be applied to roadbed materials and the like, and can be reused and recycled.

<Management method of recycled aggregates>
Furthermore, the management method of the recycled aggregate etc. which concern on this invention is demonstrated in detail based on an accompanying drawing. FIG. 15 is an explanatory diagram conceptually showing a method for managing recycled aggregate according to an embodiment of the present invention, and FIGS. 16 to 18 are conceptual diagrams showing an example of a stockyard.

The method for managing reclaimed aggregate according to the present embodiment regenerates the return raw concrete that has been carried in from the agitator car so that the quality properties of the reclaimed aggregate collected thereby belong to the importer's own system. Managed.
Therefore, as shown in FIG. 15, the management target is the importer, the return raw concrete and the recycled aggregate, and the purpose is to receive the delivery of the recycled aggregate related to the return raw concrete which the importer has carried in. is there.
The importer and the return raw concrete are specified by the vehicle of the agitator car, the type of aggregate contained in the raw concrete, the type of concrete, the special order, and the like. As for agitator cars, owners or users can usually distinguish by company, and aggregates in ready-mixed concrete are known because the buyers and types of aggregates by importers are known from concrete applications. is there.
Moreover, the return raw container is cured based on the classification of the stock yard 3 prepared for each specified importer, and individually reprocessed.
Furthermore, the recycled aggregate is obtained by individual processing using the return processing container recycling facility of the present invention, and at the time of delivery, verification and confirmation may be performed according to the classification of the importer and the stockyard 3.
As a result, the recycled aggregate coincides with the return raw material of the importer, so that the importer can receive the aggregate having quality properties belonging to his / her system.
In order to achieve such management targets and purposes, FIGS. 16 to 18 are conceptual diagrams of stock yards. In this case, FIG. 16 is a plan view, FIG. 17 is a sectional view taken along line AA in FIG. 16, and FIG. 18 is a sectional view taken along line BB in FIG. .
According to FIG. 16, the stock yard 3 has, for example, a central roadway 60, and stock yards 3 </ b> A to 3 </ b> F according to appropriate sections prepared for each importer are provided on both sides thereof. .
Further, the stock yards 3A to 3F have slopes 61 as in FIG. In addition, a guide rail 62 suitable for taking out is provided on the bottom surface part because it is necessary to smoothly take out the return raw material cured by the shovel track, the backhoe or the like. In the illustrated case, the guide rail 62 is shown as exaggerated, but the protruding height from the bottom surface can be dealt with by laying gravel or the like.
Therefore, according to the method for managing recycled aggregate according to the present invention, at the time of regeneration processing of the return raw component, for example, the return raw component is cured for a certain period based on the classification as seen in the stock yards 3A to 3F. What is necessary is just to make it collect | regenerate and collect | recover.
As a result, the facility owner can ship the recycled aggregate belonging to the importer's own system through the management by the stock yard classification and the individual regeneration processing.

It is a conceptual explanatory drawing which shows the reproduction | regeneration processing facility of the return raw container which concerns on 1st Embodiment of this invention. It is the characteristic figure which showed the compressive strength of concrete in typical cement. It is explanatory drawing which showed the supply means in a crusher and a granulator conceptually, FIG. 3 (a) is explanatory drawing with respect to a crusher, FIG.3 (b) is explanatory drawing with respect to a granulator. It is a conceptual explanatory drawing which shows the reproduction | regeneration processing facility of the return raw container which concerns on 2nd Embodiment of this invention. It is a conceptual explanatory drawing which shows a part of the regeneration processing facility of the return raw container which changed the structure of the granulator. FIG. 6A is a conceptual diagram showing a vertical granulator, FIG. 6A is a cross-sectional view, and FIG. 6B is a plan view. It is a notional plan view showing a horizontal granulator. It is a conceptual partial explanatory drawing which shows the reproduction | regeneration facility of the return raw container which concerns on 3rd Embodiment of this invention. FIG. 9 is a schematic explanatory diagram showing the flowchart in the regeneration processing step for the aggregate and the like of the return raw concrete corresponding to FIGS. 1 and 8. It is a conceptual partial explanatory drawing which shows the reproduction | regeneration facility of the return raw container which concerns on 4th Embodiment of this invention. It is explanatory drawing of the outline shown corresponding to FIG.4 and FIG.10 about the flowchart in the reproduction | regeneration processing processes, such as aggregate of a return raw concrete. It is a conceptual partial explanatory drawing which shows the reproduction | regeneration facility of the return raw container which concerns on 5th Embodiment of this invention. It is a conceptual explanatory view showing a main part in a regeneration facility of a return raw concrete to which a vibro screen is applied as an aggregate recovery device. It is explanatory drawing of the conceptual principal part which shows the reproduction | regeneration facility of the return raw container which concerns on 6th Embodiment of this invention. It is explanatory drawing which showed notionally the management method of the reproduction | regeneration aggregate which concerns on embodiment of this invention. It is a conceptual top view which shows an example of a stockyard. It is sectional drawing obtained along the AA line in FIG. It is sectional drawing obtained along the BB line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Agitator wheel 2 Return raw material 3, 3A-3F Stockyard 4 Breaker 5 Crusher 6 Primary treatment 7 Granulator 7a Primary granulator 7b Secondary granulator 8, 8a, 8b Secondary treatment 9 Sieving machine 9a Primary Sieve machine 9b Secondary sieve machine 10 Recycled coarse aggregate 11, 11a, 11b, 31, 31a, 31b Recycled fine aggregate 12 Aggregate regenerator 13 Small piece 17 Aggregate 18 Adhering mortar 20 Granulator main body 21 Rotor 22 Groove portion 23 Protrusion portion 24 Discharge space 25 Inclined wall 26a, 26b Dead stock 27 Input port 28 Crushing blade 30 Dry cyclone 32, 32a, 32b Mortar 35 Car wash place 36 Car wash chute 37a Trommel classifier 37b Vibro screen 38a, 38b Coarse aggregate 39a, 39b Fine aggregate 40 Supernatant water 41, 48, 53 Transfer pipe 42 Water tank 43a, 43b, 43c Branch pipe 44 Conveyor 47a, 47b, 47c Submersible pump 49 Fine aggregate cyclone 50 Conduit 51 Classifier 52 Precipitation tank 54 Dehydrator 55 Stirring blade 56 Sludge water tank 56a Catch plate 56b Push plate 57a Reverse member 57b Reverse Washing device 58 Dehydrated cake 59 Filtration water tank 60 Central passage 61 Slope 62 Guide rail

Claims (10)

A return yard regeneration processing facility comprising at least a stock yard for receiving and curing a return kon of an agitator car and an aggregate regeneration device for collecting aggregates from the return kon hardened in the stock yard,
The aggregate reclaiming device crushes the hardened return raw kon, thereby crushing the primary treated product into aggregate and mortar, and separating the aggregate and mortar into aggregate and mortar. A sizing machine for producing a secondary treated product, a sieve for classifying the secondary treated product into a regenerated coarse aggregate and a regenerated fine aggregate via a mortar,
A reprocessing facility for returning raw food containers.   The return raw food recycling treatment facility according to claim 1, wherein the return raw food is cured by curing for 1 to 7 days.   The granulator includes a first granulator and a second granulator, and the sieve includes a first sieve and a second sieve, and the first granulator and the first sieve The second raw sizing machine and the second sieving machine are arranged on the downstream side, respectively.   The said granulator is comprised from the 1st granulator and the 2nd granulator, and the sieving machine is arrange | positioned in the downstream of the 2nd granulator, The Claim 1 or Claim 2 characterized by the above-mentioned. The recycling processing facility for return raw containers described in 1.   The regenerative processing facility for return raw containers according to claim 1, further comprising a dry cyclone downstream of the sieving machine.   The facility where the stock yard is arranged is provided with a car wash station that can be used for washing the agitator car following the receipt of the return raw container from the agitator car. 5. A recycling processing facility for return raw containers according to 5.   The said raw car wash place is equipped with the aggregate recovery apparatus which collect | recovers coarse aggregate and fine aggregate from the return raw concrete generated by the car wash, The reproduction | regeneration processing facility of the return raw concrete of Claim 6 characterized by the above-mentioned.   The regeneration processing facility for return raw containers according to claim 7, wherein a dehydrator for generating dehydrated cake from sludge water generated by car washing is connected to the aggregate recovery device.   The regeneration unit according to claim 8, wherein a filtration tank containing filtered water is connected to the dehydrator, and the supernatant water in the filtration tank is reused for washing the agitator vehicle. Processing facility. The recycled aggregate recovered from the return raw concrete carried by the agitator car is a management method of the recycled aggregate managed for each importer,
The importer is identified from the vehicle of the agitator car, the type of aggregate in the raw concrete, etc.
The return raw containers are cured based on the stock yard division prepared for each specified importer, and then individually recycled,
The recycled aggregate management method according to claim 1, wherein the recycled aggregate is delivered to the importer specified based on the stockyard classification, and the quality property belongs to the importer's own system.

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