JP2010214718A - Method of producing material for subgrade material, and subgrade material using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of recycling subgrade material using residual concrete difficult to dispose of in a complete recycling way or near to it, while suppressing apparatus coat and running cost low. <P>SOLUTION: The method of producing the material for subgrade material using uncured residual concrete as raw material, includes processes of: recovering coarse aggregates as a first material R1 for subgrade material, using a bucket 10 for coarse aggregate separation, separating coarse aggregate C with uncured cement paste or cement mortar attached thereto from the residual concrete R, with particle sizes above a given size, and drying and curing as it is; molding the uncured mortar M in the residual concrete obtained by the separation treatment to obtain given particle sizes and shapes by using pallets 1 including a frame 2 partitioned into small sections by partition walls; curing the molded mortar by stacking the pallets having completed molding and aging; and recovering a molded body as a second subgrade material R2 by demolding cured molded mortar from the pallets. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a roadbed material and a roadbed material using the material, and in particular, from a concrete (remaining concrete) as an industrial waste returned without being placed at a construction site or the like, a roadbed as a product. The present invention relates to a method of manufacturing a material for materials in a completely recycled form or a form close thereto, and a roadbed material using the material manufactured by the method.

  The concrete that is left in the ready-mixed vehicle (agitator truck) without being placed at the construction site and returned to the ready-mixed factory is called “remaining control” or “return control” (hereinafter referred to as “remaining control”), and all Is treated as industrial waste, or after separating and collecting coarse aggregates and fine aggregates at ready-mixed concrete factories, etc., the sludge is dehydrated and the dehydrated cake is treated as industrial waste, or the remaining concrete is dried by sunlight. After being cured, it was appropriately crushed and treated as a landfill material.

  However, in order to treat the above-mentioned remaining kon or dehydrated cake as industrial waste, a large amount of industrial waste treatment costs are required, and there are also problems such as water pollution and noise problems in the treatment plant and its vicinity, and depletion of landfills.

  Therefore, various methods for reusing the remaining computer have been studied. For example, in Patent Document 1, the remaining concrete is discharged from the ready-mixed car as it is, using as little water as possible in a short time, coarse aggregate, fine aggregate, and cement that is active after the next day. There has been proposed a method of separating the sludge water as the main component, and effectively reusing all the components of the remaining kon as a raw material of the kon from the next day.

  Further, Patent Document 2 discloses a method of combining coral reef rock (marine limestone) at a predetermined ratio with the remaining material after washing the remaining container, pressurizing it, and reusing it as roadbed material, and wear resistance. In addition, a roadbed material is disclosed in which the strength is significantly improved as compared with the conventional one.

JP 09-123156 A Japanese Patent Laid-Open No. 06-228904

  However, in the method described in Patent Document 1, the residual condenser is directly supplied to the first separator of the vibration sieve type, and the aqueous solution of the cement setting retarder is passed through the layer of the separation object on the sieve together with the cement. It is necessary to separate the coarse aggregate while spraying with the pressure dropped from the sieve mesh, and to separate into fine aggregate and sludge water mainly composed of cement and water using a second separation device such as a screw type. For this reason, there are problems that the processing is complicated and expensive, and that quality control of the ready-mixer takes time.

  In addition, in the method described in Patent Document 2, it is necessary to clean the remaining components, and it is necessary to procure a special coral leaf lock, which is not versatile and increases the manufacturing cost of the roadbed material. is there.

  Therefore, the present invention has been made in view of the problems in the above-described conventional technology, and is processed as conventional industrial waste while keeping the apparatus cost and operation cost low, resulting in a large industrial waste processing cost. The goal is to recycle roadbed materials that have value as products by completely recycling the remaining components.

  In order to achieve the above object, the present invention is a pallet that can be transferred by a forklift, wherein at least one of the upper surface and the lower surface of the pallet functions as a mold for molding cementitious material. To do. By making a part of this pallet function as a formwork, uncured mortar separated from the remaining components can be molded easily and efficiently, and a roadbed material having product value can be manufactured. That is, this pallet has a function as the mold and also has the original function of a pallet that can be transferred by a forklift, so using a forklift, stacking pallets formed of uncured mortar, Can be transported.

  The pallet may include a partition frame that is partitioned into small sections by a partition wall that is placed in the mold from the upper surface of the mold provided in the pallet body. Thereby, it becomes easy to obtain molded bodies (pin rollers) of various dimensions, and demolding can be easily performed.

  The present invention also relates to a coarse aggregate separating bucket that can be transferred by a forklift, wherein the coarse aggregate is separated from the non-hardened concrete, and an inlet for putting unhardened concrete into the bucket. A screen for separating the aggregate, a discharge port for discharging the separated coarse aggregate, and a discharge port for discharging uncured mortar under the screen for separating the aggregate. To do.

  The remaining concrete is put into this coarse aggregate separation bucket, and can be easily separated into coarse aggregate and uncured mortar using an aggregate separation screen. The separated coarse aggregate is used for roadbed materials. It can be used as a material. Further, since this bucket can be transferred by a forklift, the bucket is vibrated on the fork of the forklift, and the coarse aggregate and the uncured mortar separated while the bucket is placed on the fork can be recovered.

  Furthermore, the present invention is a method for manufacturing a roadbed material using uncured residual concrete as a raw material, and using the coarse aggregate separating bucket, a predetermined uncured cement paste or cement mortar is attached. Separating coarse aggregate of a particle size or more from the residual component, drying and hardening as it is, or washing to recover the coarse aggregate as the first roadbed material, and in the residual component obtained by the separation process Forming the uncured mortar using the above pallet having a mold or a mold separately provided with a partition or a partition frame divided into small sections by a partition so as to obtain a predetermined particle size and shape; It includes a process of stacking and curing the pallets that have been molded and curing the molded mortar, and a process of removing the molded mortar cured from the pallet and recovering the pin roller as the second roadbed material. And wherein the Rukoto. According to the present invention, the first and second roadbed material materials can be obtained easily and at low cost from the remaining components, and the remaining components can be effectively used as products without being disposed of as waste. .

  In the method for manufacturing a roadbed material, as described above, the coarse aggregate separating bucket can be placed on a fork of a forklift, and the separation process can be performed on the fork of the forklift. Thereby, the remaining concrete can be easily separated into coarse aggregate and uncured mortar, and the first roadbed material can be efficiently manufactured. In addition, since a movable forklift is used, it is not necessary to fix a facility for separation processing, and it is possible to cope freely even in a narrow site.

  In the method for manufacturing a roadbed material, the pallet can be placed on a fork of a forklift, and the molding mortar can be removed by reversing the fork. Thereby, the demolding operation | work of a shaping | molding mortar can be performed easily and manufacture of the 2nd material for roadbed materials can also be performed efficiently.

  Furthermore, the present invention is more specifically a method for manufacturing a roadbed material using uncured residual concrete as a raw material, and the coarse aggregate separating bucket placed on the fork of a forklift The remaining concrete is charged and separated into coarse aggregate of a predetermined particle size to which cement paste or cement mortar is adhered and other uncured mortar by the vibrating sieve using the fork and / or vibrator, and the inclination of the fork And the vibration, the coarse aggregate and other uncured mortar are each discharged from the coarse aggregate separation bucket, and the coarse aggregate is left as it is or washed to be used as a first roadbed material. Each of the pallets having a formwork separately collected with a formwork or a separate formwork that is collected and divided into small sections by partition walls so as to obtain a predetermined particle size and shape. After filling the image and molding while applying vibration by a vibrator, move and stack the molded pallets to a curing place with a forklift to cure the molded mortar, then take out the cured pallet with the forklift, Reversing the fork, demolding the pallet or pallet body with a forklift with the mold part of the pallet where the hardened molding mortar is present facing downward, and dropping the molded product or its fractured product. The second roadbed material is collected as a material. According to the present invention, since a special bucket and pallet are used and the forklift is used for processing, a roadbed material can be efficiently manufactured from the remaining components.

  Further, the present invention is a roadbed material in which the remaining components are commercialized, the first roadbed material and the second roadbed material obtained by the above-described method for manufacturing a roadbed material, and a separate raw concrete sludge Two or more kinds of aggregates having a particle size of 10 mm or less collected from the mixture are mixed and the particle size is adjusted. Since the first roadbed material, the second roadbed material produced by appropriately designing the particle size, and the aggregate from the raw consludge are used, the particle size design can be freely performed and various needs can be met.

  As described above, according to the present invention, it is possible to easily and cost-effectively produce roadbed material having a value as a product from the remaining components that have been completely recycled and processed as industrial waste and have generated a large amount of industrial waste disposal costs. Since it is possible to play it with, the financial merit is great. In addition, according to the present invention, environmental problems such as generation of dust and water pollution are also solved.

It is the schematic which shows the pallet used for the manufacturing method of the material for roadbed materials concerning this invention, Comprising: (a) is a top view, (b) is the sectional view on the AA line of (a), (c) is (b) (B) is an enlarged view of part B, and (d) is an enlarged view of part C of (b). BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows the bucket used for the manufacturing method of the material for roadbed materials concerning this invention, Comprising: (a) is a front view, (b) is a top view, (c) is a partially broken exploded plan view. It is explanatory drawing of the manufacturing method of the material for roadbed materials concerning this invention. It is a figure which shows 2nd Embodiment of the pallet concerning this invention, Comprising: (a) is a top view, (b) is the EE sectional view taken on the line (a), (c) shows one partition plate. Front view and side view, (d) is a front view and side view showing the other partition plate, (e) is a cross-sectional view showing a state in which the partition plates are crossed, and (f) is an enlarged view of the W part of (a). It is. It is a figure for demonstrating the process of manufacturing a pin roller using the pallet shown in FIG. It is a figure which shows 3rd Embodiment of the pallet concerning this invention, Comprising: (a) is a top view, (b) is the FF sectional view taken on the line of (a). It is a figure which shows the lid | cover of the pallet shown in FIG. 6, Comprising: (a) is a top view, (b) is the GG sectional view taken on the line (a), (c) is a bottom view. It is a figure for demonstrating the process of manufacturing a pin roller using the pallet shown in FIG. 6, and the lid | cover shown in FIG. 7, (a) is a top view, (b) is the HH line | wire of (a). Sectional drawing, (c) is a schematic view showing a state in which the pallet is inverted. It is a figure which shows the other example of the lid | cover of the pallet shown in FIG. 6, Comprising: (a) is a top view, (b) is the II sectional view taken on the line of (a), (c) is a bottom view. It is a figure for demonstrating the process of manufacturing a pin roller using the pallet shown in FIG. 6 and the lid | cover shown in FIG. 9, (a) is a top view, (b) is the JJ line | wire of (a). Sectional drawing, (c) is a schematic view showing a state in which the pallet is inverted. It is a figure which shows 4th Embodiment of the pallet concerning this invention, Comprising: (a) is a top view, (b) is the KK sectional view taken on the line (a). It is a figure which shows the upper formwork of the pallet shown in FIG. 11, Comprising: (a) is a top view, (b) is the LL sectional view taken on the line of (a). It is a figure which shows the lower mold form of the pallet shown in FIG. 11, Comprising: (a) is a top view, (b) is the MM sectional view taken on the line of (a).

  Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a pallet used in a method for manufacturing a roadbed material according to the present invention. The pallet 1 is provided with a mold 2 for molding a cement-based material on one side. Separately, the pallet 1 is configured by a mold body (outer frame) 3 formed in a rectangular shape in plan view and a partition wall 4 for partitioning into small sections. The partition wall 4 may be fixed to the formwork body 3 or detachable.

  The pallet 1 is made of a lightweight and durable resin (for example, polypropylene), a durable material such as steel, or wood, and includes a recess 1b for fixing the mold 2 to the upper surface 1a, and is provided on the lower surface 1c side. A fork insertion hole 1d for transfer by a forklift is formed.

  The mold 2 is fixed to the recess 1b of the pallet 1 with an adhesive or the like, or is detachably held using a fixing bracket or the like. In FIG. 1 (d), a cement-type material is formed by including a large number of recesses 4a made of rubber, resin, steel, wood, or the like and partitioned into small sections by a partition wall 4 provided integrally with the mold body 3. Function as a formwork. As clearly shown in FIG. 1C, the recess 4a is formed as a prismatic or columnar space that expands upward in order to facilitate demolding of the molded product. In addition, the dimensions (X to Z) of the recess 4a are 25 mm, 30 mm, 35 mm, 40 mm, and the like according to the dimensions of the pin roller (second roadbed material) to be manufactured as shown in FIG.・ ・ Changed.

  FIG. 2 shows a coarse aggregate separating bucket (hereinafter referred to as “bucket”) 10 used in the method for manufacturing a roadbed material according to the present invention. This bucket 10 is entirely made of steel or the like and is directed upward. Formed in the shape of a boat-shaped container having an opening, an inlet 11 for charging uncured concrete (remaining concrete) and an aggregate separating screen (hereinafter referred to as “screen” for separating coarse aggregate from uncured concrete ”, 12, a coarse aggregate discharge unit 13 for discharging the separated coarse aggregate, and an uncured mortar discharge unit (hereinafter“ mortar discharge unit ”) for discharging uncured mortar under the screen 12. 14) and a fork insertion portion 16 for transfer by a forklift.

For example, the overall volume of the bucket 10 is about 0.5 m ³ , and an industrial screen having a mesh size of 10 mm or 13 mm is used for the screen 12. The screen 12 can be detachably attached between an upper body 17 having a coarse aggregate discharging portion 13 and a lower body 18 having a mortar discharging portion 14, and the upper body 17 and the lower body 18 are also hinged. Etc., so that each member can be easily cleaned.

  The coarse aggregate discharge unit 13 and the mortar discharge unit 14 open upward, and the bucket 10 is tilted by a forklift to discharge the coarse aggregate on the screen 12 from the coarse aggregate discharge unit 13, and the first roadbed material It can be collected as material. Moreover, the uncured mortar under the screen 12 can be discharged from the mortar discharge portion 14 and recovered as the second roadbed material.

  Next, a method for manufacturing a roadbed material according to the present invention using the pallet 1 and the bucket 10 provided with the mold 2 will be described with reference to FIG.

  When the ready-mixed car containing the remaining control in the agitator returns to the ready-mixed factory, the bucket 10 is placed on the fork 21 of the forklift (not shown), and the remaining control R is put into the bucket 10 via the chute 22 of the ready-mixed car. . The fork 21 and the rod-shaped vibrator 24 are used to vibrate the screen 12, and the residual component R on the screen 12 is changed to coarse aggregate (predetermined on the screen 12) C having a predetermined particle size to which cement paste or cement mortar is adhered, Separated into other uncured mortar (falling below the aggregate separation screen 12) M. The sludge generated when the inside and outside of the agitator is cleaned is transferred to a sludge recovery plant.

  Next, the fork 21 of the forklift is tilted to tilt the bucket 10, and the coarse aggregate C is discharged from the coarse aggregate discharge portion 13. Next, the fork 21 is used to incline the bucket 10 in the reverse direction, and the uncured mortar M is discharged from the mortar discharge portion 14. The coarse aggregate C is dried and cured as it is, recovered as the first roadbed material R1, and stored in the aggregate yard. The particle diameter of the first roadbed material R1 is mainly 10 mm to 20 mm or 10 mm to 40 mm.

  On the other hand, the uncured mortar M is filled in the concave portion 4a of the mold 2 of the pallet 1 so as to obtain a predetermined particle size and shape, and is molded while being vibrated by the rod-shaped vibrator 26. Move and stack to a curing place with a forklift. The top of the stacked pallet 1 is covered.

  Stacked molded mortars are cured for more than a day, the cured pallet 1 is taken out by a forklift, the fork 21 of the forklift is inverted, the pallet 1 or the mold 2 is dropped, and demolded by the impact of the drop The object is collected as a pin roller (second roadbed material) R2.

  According to needs, the first roadbed material R1 and the second roadbed material R2 obtained as described above, and the aggregate A having a particle size of 10 mm or less separately collected from the raw consludge as necessary. By appropriately mixing and adjusting the particle size, recycled roadbed material RC-40 and the like can be obtained.

  Specifically, for example, the first roadbed material R1 (10 mm to 20 mm or 10 mm to 40 mm), the second roadbed material R2 (25 mm to 40 mm), and recovered from the raw consludge (0 mm to 10 mm) is mixed as appropriate to produce the roadbed material RC-40. In addition, the roadbed material RC-40 is a regenerated grained roadbed material and is used as a lower layer roadbed material, and the quality thereof is defined in the Japan Road Association Regenerated Roadbed Material.

  The mixed product manufactured as described above is subjected to quality control such as particle size distribution and abrasion, and an appropriate product is attached as a test table and shipped as recycled roadbed material RC-40. Moreover, the above-mentioned mixed product, Crushalan C-40 manufactured at a crushed stone factory, roadbed material (JIS A500) and the like can be mixed and shipped as roadbed material RC-40. At this time, if the above mixture is transported from the ready-mixed factory to the crushed stone factory as a return of the dump truck transported from the crushed stone factory to the ready-mixed factory, the transportation efficiency can be improved.

  As described above, in the present embodiment, since the pallet 1 has both functions of a pallet and a molding frame, molding of uncured mortar separated from the remaining components, curing, stacking, demolding Etc. can be carried out easily using a forklift, the workability is improved, the initial investment is small, environmental problems such as noise do not occur, and it can be carried out even in a small site.

  Further, since the bucket 10 can be transported and handled by a forklift, the workability is good, and it is not necessary to fix equipment for separating the coarse aggregate C and the uncured mortar M, so that the bucket 10 is narrow. It can be used on site, and has various effects such as a small initial investment.

  In the above embodiment, the mold 2 provided on the pallet 1 is composed of the mold main body (outer frame) 3 and the partition wall 4, but the pallet main body itself made of resin, steel, wood or the like is used as the mold. It is also possible to directly drill a recess for directly molding an uncured mortar. At this time, molding concave portions may be formed on the upper and lower surfaces of the pallet body.

  Further, when the mold 2 provided on the pallet 1 is composed of the mold body (outer frame) 3 and the partition wall 4, the partition wall 4 can be attached to and detached from the mold body 3, or the mold frame 2 can be attached to a predetermined area. For example, it may be possible to divide each column or each row in FIG. 1A.

  Furthermore, the pallet 1 can be formed in a lattice shape with openings, and a large number of bottomed box-shaped portions that function as the partition walls 4 can be attached to and detached from the lattice-shaped portion of the pallet 1, and commercially available seedlings Configurations such as boxes and seedling mats can also be used.

  Moreover, in the said embodiment, although the recessed part 4a from which the dimension of 25 mm, 30 mm, 35 mm, and 40 mm differs was formed in the mold 2, the dimension of the recessed part 4a formed in one mold 2 is 25 mm, 30 mm, 35 mm, and 40 mm. It is also possible to unify any one of the above and prepare four types of molds 2 and alternately mold the molds 2 having recesses 4a of different dimensions when molding uncured mortar.

  In addition, the bucket 10 is not limited to the shape shown in FIG. 2 and can be transferred by a forklift. The bucket 10 is provided with a charging port for charging uncured concrete (remaining concrete etc.). It is sufficient if it has an aggregate separating screen that separates coarse aggregate and uncured mortar and an outlet for each of the separated objects. The screen is preferably detachable so that it can be variously replaced.

  Furthermore, although the screen 12 of the bucket 10 is vibrated using the fork 21 and the rod-like vibrator 24, the rod-like vibrator 24 is not necessarily required, and the screen 12 can be vibrated using only the fork 21. Further, when filling the uncured mortar M into the recess 4 a of the mold 2 of the pallet 1 and molding it, the vibration of the fork 21 alone can be provided without using the rod-like vibrator 26.

  Next, a second embodiment of the pallet according to the present invention will be described with reference to FIGS.

  The pallet 31 is made of resin, steel, wood, or the like, and includes a mold frame 31a and a fork insertion portion 31b for transfer by a forklift on the lower surface thereof.

  The mold body 31a of the pallet 31 is provided with a large number of partition plates 32 and 33 constituting partition walls for partitioning the mold body 31a into small sections, and the partition walls 32 and 33 constitute a partition frame. As shown in FIG. 4 (c), the partition plate 32 extending in the vertical direction in FIG. 4 (a) is formed into a plate shape with a steel strip or the like, and includes a number of slit-shaped notches 32a on the upper side. . Further, the partition plate 33 extending in the horizontal direction in FIG. 4A is also formed in a plate shape with a steel strip or the like, as shown in FIG. 4D, and has a large number of slit-shaped notches 33a on the lower side. Is provided. In order to make the drawing easier to see, the dimensions X to Z of the concave portion 34 partitioned into small sections are drawn larger than the actual size in comparison with the overall dimensions of the pallet 31 in FIG.

  As shown in FIG. 4E, the partition plate 32 is placed on the bottom surface of the mold body 31a, and placed on the partition plate 32 so that the partition plate 33 intersects. At this time, the partition plate 32 is accommodated in the notch 33a of the partition plate 33, and the partition plate 33 is accommodated in the notch 32a of the partition plate 32. The engagement state of the partition plate 32 and the notch 33a, and the partition plate The engagement state between the 32 notches 32a and the partition plate 33 is loosened so that the engagement state can be easily released.

  In the state shown in FIGS. 4A and 4B in which a large number of partition plates 32 and partition plates 33 are placed on the outer frame 31a so as to cross each other, it functions as a mold for molding cementitious material. Further, in this state, as shown in FIG. 4 (f), the end portions of the partition plates 32 and 33 are fitted into the concave portions 31b formed in the pallet 31, thereby making it easy to assemble the partition plates 32 and 33. It becomes. The dimensions X to Z of the recesses 34 formed by the partition plate 32 and the partition plate 33 are each selected from 25 mm, 30 mm, 35 mm, and 40 mm in accordance with the dimensions of the pin roller to be manufactured. That is, the dimensions X to Z of the concave portion 34 partitioned into small sections of one pallet 31 are unified to any one of 25 mm, 30 mm, 35 mm, and 40 mm, and four types of pallets 31 having different dimensions X to Z are prepared. .

  Next, a method for manufacturing a pin roller using the four types of pallets 31 will be described with reference to the drawings.

  The uncured mortar M separated from the remaining components using the bucket 10 shown in FIG. 2 and the like is filled into the concave portions 34 of the pallet 31 shown in FIGS. 4A and 4B (FIG. 5A). (See Fig.), Molding while applying vibration by a rod-like vibrator. This operation is performed for each of four types of pallets 31 having different dimensions X to Z.

  Next, the molded pallet 31 is moved to a curing place by a forklift and stacked as shown in FIG. Each number of the pallet 31 in the figure indicates the dimensions X to Z of the concave portion 34 of each pallet 31. That is, the pallets 31 are stacked in the order of the dimensions X to Z of the recesses 34 from the bottom to the top, 40 mm, 35 mm, 30 mm, and 25 mm.

  The stacked molding mortar M is cured for one day or longer, the pallet 31 is taken out, and the fork 21 of the forklift inserted into the fork insertion portion 31b is inverted as shown in FIG. The partition plates 32 and 33 are dropped together with the hardened molding mortar M, and the molded product demolded by the impact of dropping is collected as a pin roller. If the mold is not removed once, the partition plate 32 and the partition plate 33 are dropped several times. At this time, if the pallet 31, the partition plate 32, and the partition plate 33 are connected using a chain or the like, the dropping operation can be performed efficiently.

  Next, a third embodiment of the pallet according to the present invention will be described with reference to FIGS.

  The pallet 41 shown in FIG. 6 is made of a steel plate, resin, or the like, and includes a mold frame 41a and a fork insertion portion 41b for transfer by a forklift on the lower surface thereof. A plurality of U-shaped grooves 41c are formed in the mold frame 41a. The width and depth of the groove 41c are unified to dimensions X and Z. In order to make the drawing easier to see, the width and depth of the groove 41c are drawn larger than actual in comparison with the overall dimensions of the pallet 41 in the figure.

  FIG. 7 shows a lid 51 used for the pallet 41. The lid 51 is formed in a rectangular plate shape in plan view and has a shape corresponding to the cross-sectional shape of the groove 41c of the pallet 41 on the lower surface 51a. Many tongue-like plates 51b are provided. The vertical interval of the tongue-like plate 51b is unified to the dimension Y. However, the downward extending length L of the tongue-shaped plate 51b is formed to be slightly larger (actually about 10 mm) than the depth Z of the pallet 41, as will be described later.

  In one pallet 41, the dimensions X to Z are unified to any one of 25 mm, 30 mm, 35 mm, and 40 mm, and when preparing four types of pallets 41 and molding an uncured mortar, different dimensions X to Z Are alternately used.

  Next, a method for manufacturing a pin roller using the pallet 41 will be described with reference to the drawings.

  After filling the uncured mortar M separated from the remaining components using the bucket 10 or the like shown in FIG. 2 into the groove 41c of the pallet 41 shown in FIG. 6, it is shown in FIGS. 8 (a) and 8 (b). As described above, the lid 51 is placed on the pallet 41 so that the tongue plate 51 b of the lid 51 is inserted into the groove 41 c of the pallet 41. At this time, a gap C is formed between the lower surface of the lid 51 and the upper surface of the pallet 41 due to the difference between the dimension Z of the groove 41c and the extending length L of the tongue-shaped plate 51b. not exist. This operation is performed for each of four types of pallets 41 having different dimensions X to Z.

  Next, the molded pallet 41 is moved to a curing place by a forklift and stacked as shown in FIG.

  The stacked molded mortar M is cured for one day or longer, the cured pallet 41 is taken out together with the lid 51 by a forklift, and the fork 21 of the forklift inserted into the fork insertion part 41b as shown in FIG. Inverted, the pallet 41 and the lid 51 are dropped together with the hardened molding mortar M, and the molded product removed by the impact of dropping is collected as a pin roller. At this time, as described above, a gap C is formed between the lower surface of the lid 51 and the upper surface of the pallet 41, and the mortar M does not exist in this portion, so that demolding can be performed efficiently. If the mold is not removed once, the pallet 41 and the lid 51 are dropped several times.

  Next, another example of the lid used for the pallet 41 shown in FIG. 6 will be described with reference to FIG.

  The lid 55 is formed in a plate shape having a rectangular shape in plan view, and a plurality of reinforcing bars 56 are stretched over the frame body 55a, and a plurality of plate-like tongue-like plates 57 are provided on each reinforcing bar 56. The shape and dimensions of the tongue plate 57 are the same as the tongue plate 51b shown in FIG.

  Next, a method for manufacturing a pin roller using the pallet 41 having the lid 55 will be described with reference to FIG.

  The uncured mortar M separated from the remaining components using the bucket 10 or the like shown in FIG. 2 is filled into the grooves 41c from the many lattice-shaped openings 58 shown in FIG. Thereby, the mortar M is filled in each space partitioned by the tongue plate 57 in the groove 41c. At this time, a gap C is formed between the lower surface of the lid 55 and the upper surface of the pallet 41 due to the difference between the dimension Z of the groove 41c and the extending length L of the tongue plate 57, and the mortar M is formed in this portion. not exist. This operation is performed for each of four types of pallets 41 having different dimensions X to Z.

  Next, the molded pallet 41 is moved to a curing place by a forklift and stacked as shown in FIG.

  The stacked molded mortar M is cured for one day or longer, and the pallet 41 that has been cured is taken out together with the lid 55 by a forklift. As shown in FIG. 10C, the fork 21 of the forklift inserted into the fork insertion part 41b is attached. Inverted, the pallet 41 and the lid 55 are dropped together with the hardened molding mortar M, and the molded product removed by the impact of dropping is collected as a pin roller. At this time, as described above, a gap C is formed between the lower surface of the lid 55 and the upper surface of the pallet 41, and the mortar M does not exist in this portion, so that demolding can be performed efficiently. If the mold is not removed once, the pallet 41 and the lid 55 are dropped several times.

  Next, a fourth embodiment of the pallet according to the present invention will be described with reference to FIGS.

  This pallet 61 has a two-layer structure of an upper mold 71 made of an elastic body such as rubber and a lower mold 81, and includes a fork insertion portion 81b for transfer by a forklift on the lower surface of the lower mold 81, The molds 71 and 81 are joined by a hinge 62. The pallet 61 has a recess 61a, and the dimensions X to Z of the recess 61a are changed to 25 mm, 30 mm, 35 mm, 40 mm,... According to the dimensions of the pin roller to be manufactured.

  FIG. 12 shows an upper mold 71. The upper mold 71 is formed in a rectangular plate shape in plan view, and has a large number of through holes 71a having a trapezoidal cross section. Each inner surface of the through hole 71a is formed to be continuous with the inner surface of the recess 81a (see FIG. 11) of the lower mold 81 when the molds 71 and 81 are joined.

  FIG. 13 shows a lower mold 81, which is also formed in a rectangular plate shape in plan view, a fork insertion portion 81 b is provided on the lower surface, and a hinge 62 is provided on the side. In order to make the drawing easy to see, the dimensions of the through holes 71a, the recesses 81a, etc. are drawn larger than the actual dimensions in comparison with the overall dimensions of the pallet 61 in the figure.

  Although the detailed description of the pallet 61 is omitted, it can be used in the same manner as the pallet 1 shown in FIG. 1. In this embodiment, the pallet 61 is divided into an upper mold 71 and a lower mold 81. Therefore, after filling the concave portion 61a composed of the through hole 71a and the concave portion 81a with the uncured mortar separated from the remaining components, the molded mortar is cured, the cured pallet 61 is taken out by a forklift, and the hinge 62 is Remove the fork of the forklift, turn the upper mold 71 and the lower mold 81 together with the hardened molding mortar, and when removing the molded product removed by the impact of the fall as a pin roller, it is easier to remove the mold It can be carried out.

  In the above embodiment, as shown in FIG. 3, the coarse aggregate separating bucket 10 is used to leave coarse aggregate R having a predetermined particle size or more to which uncured cement paste or cement mortar is adhered. The coarse aggregate as the first roadbed material R1 was collected after being separated from the concrete and dried and hardened as it was. After the coarse paste R was washed and the adhered cement paste was removed, the first aggregate was removed. The coarse aggregate as the roadbed material R1 can also be collected. The removed cement paste can be used as a material for producing the pin roller after, for example, drying in the sun.

  Further, in the above embodiment, the first roadbed material R1 and the second roadbed material R2 and the aggregate A having a particle size of 10 mm or less separately collected from the raw concrete sludge are mixed, and the particle size is adjusted appropriately. Although the roadbed material RC-40 is manufactured, other types of roadbed materials such as RC-80 can also be manufactured using these, and the first roadbed material R1 and the second roadbed material R2 In addition, two or more kinds of aggregates A having a size of 10 mm or less can be mixed, and the particle size can be adjusted appropriately to produce a roadbed material. The roadbed material RC-80 is a regenerated grained roadbed material, which is used as the foundation of a structure. The quality of the roadbed material RC-80 is defined in the Japan Road Association Regenerated Roadbed Material.

DESCRIPTION OF SYMBOLS 1 Pallet 1a Upper surface 1b Placement part 1c Lower surface 1d Fork insertion hole 2 Formwork 3 Formwork body 4 Bulkhead 4a Recess 10 Bucket 11 Loading port 12 Screen 13 Coarse aggregate discharge part 14 Uncured mortar discharge part 16 Fork insertion part 17 Upper body 18 Lower body 21 Fork 22 Chute 24 Bar-shaped vibrator 26 Bar-shaped vibrator 31 Pallet 31a Formwork body 31b Recess 32 Partition plate 32a Notch 33 Partition plate 33a Notch 34 Recess 41 Pallet 41a Form frame 41b Fork insertion part 41c Groove 51 Lid 51a Lower surface 51b Tongue plate 55 Lid 55a Frame 56 Reinforcement 57 Tongue plate 58 Opening 61 Pallet 61a Recess 62 Hinge 71 Upper mold 71a Through hole 81 Lower mold 81a Recess 81b Fork insertion part

Claims (8)

  A pallet capable of being transferred by a forklift, wherein at least one of an upper surface or a lower surface of the pallet functions as a mold for molding a cement-based material.   The pallet according to claim 1, further comprising: a partition frame made of an elastic body, which is placed in the mold from the mold provided in the pallet main body and divided into small sections by a partition wall. . A coarse aggregate separation bucket that can be transferred by a forklift,
An inlet for charging uncured concrete into the bucket;
An aggregate separation screen for separating coarse aggregate from the uncured concrete;
A discharge port for discharging the separated coarse aggregate;
A coarse aggregate separation bucket, comprising a discharge port for discharging uncured mortar under the aggregate separation screen. A method for manufacturing a roadbed material using uncured residual concrete as a raw material,
Using the coarse aggregate separating bucket according to claim 3, the coarse aggregate having a predetermined particle size or more to which the uncured cement paste or cement mortar is adhered is separated from the remaining component, and is dried and hardened as it is or washed. And a step of recovering the coarse aggregate as the first roadbed material,
An uncured mortar in the residual concrete obtained by the separation treatment has a formwork that is separately provided with a formwork or a partition frame that is partitioned into small sections by partition walls so as to obtain a predetermined particle size and shape. Forming using the pallet described in 1 or 2,
Laminating and curing the completed pallet, curing the molded mortar,
Removing the hardened molded mortar from the pallet, and recovering the pin roller as the second roadbed material.   5. The method for manufacturing a roadbed material according to claim 4, wherein the coarse aggregate separating bucket is placed on a fork of a forklift, and the separation process is performed on the fork of the forklift.   The method for producing a roadbed material according to claim 4 or 5, wherein the pallet is placed on a fork of a forklift, and the molding mortar is removed by reversing the fork.   A method for producing a roadbed material using uncured residual con as a raw material, and the residual con in the coarse aggregate separating bucket according to claim 3 placed on a fork of a forklift, The coarse bone is separated into coarse aggregate of a predetermined particle size to which cement paste or cement mortar has adhered and other uncured mortar by a vibrating sieve using a fork and / or vibrator, and the coarse bone is separated by the inclination and vibration of the fork. And the uncured mortar other than the above are discharged from the coarse aggregate separating bucket, and the coarse aggregate is recovered as it is or washed as the first roadbed material, and the mortar 3. Each small section of a pallet according to claim 1 or 2, further comprising a formwork partitioned into small sections by partition walls or a formwork separately provided with a partition frame so as to obtain a predetermined particle size and shape Fill and mold with vibration by vibrator, move and stack the molded pallets to a curing place with a forklift to cure the molded mortar, then take out the cured pallet with a forklift and remove the fork of the forklift The molded product obtained by dropping the molded pallet or the pallet main body with the forklift in a state where the mold part of the pallet where the molded mortar having been cured and the cured mortar is present is suspended with a forklift, or a ruptured product thereof is obtained. A method for producing a roadbed material, characterized in that it is collected as a roadbed material.   A particle size of 10 mm or less recovered from the first roadbed material and the second roadbed material obtained by the method for manufacturing a roadbed material according to any one of claims 4 to 7 and separately from the raw consludge. A roadbed material characterized by mixing two or more kinds of aggregates and adjusting the particle size.

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