Method for manufacturing concrete compact

Abstract

To regenerate a powder generated in a processing step of processing a siding material as a concrete compact without landfill disposal.SOLUTION: A manufacturing method of a concrete compact includes: a processing step S10 of processing a siding material; a sucking step S20 of sucking a powder generated in the processing step; a collection step S30 of collecting the sucked powder; a blending step S40 of blending and kneading the collected powder, a cement, and water; and a formation step S50 of casting the kneaded product in a mold and forming a concrete compact.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] Traditionally, siding materials have been cut on-site. However, noise and dust generated during the cutting process on-site have been a problem. To solve this problem, it is known that siding materials can be pre-cut in a factory or other facility and then installed on-site, which almost completely eliminates on-site processing, eliminates noise and dust during cutting, and does not cause inconvenience to neighboring residents (Patent Document 1).

[0002] In addition, siding materials have come to be pre-cut in factories, and corner siding materials are now being manufactured by reusing the scraps of these siding materials (Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3527002 [Patent Document 2] Patent No. 4710055 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the powder generated when cutting or grinding siding materials has not been recycled and has been disposed of in landfills. The cost of disposing of the powder varies depending on the region, but it is about twice as much as siding scraps, and for manufacturers of pre-cut siding materials, the disposal costs are not insignificant. [Means for solving the problem]

[0005] A method for manufacturing a concrete molded body of the present invention includes a processing step of generating powder of the siding material when processing the siding material, a suction step of sucking up the powder, a collection step of collecting the sucked powder, a recovery step of recovering the collected powder when a certain amount of the collected powder reaches a certain level, a mixing step of mixing and kneading the recovered powder, cement, and water, and a molding step of pouring the kneaded mixture into a mold to form a concrete molded body.

[0006] Another method for manufacturing a concrete molded body of the present invention includes a processing step of generating powder of the siding material when processing the siding material, a suction step of sucking up the powder, a collection step of collecting the sucked powder, a mixing step of mixing and kneading the collected powder, cement, and water, and a molding step of pouring the kneaded mixture into a mold to form a concrete molded body.

[0007] In another embodiment of the present invention, the method may include a step of linking and storing concrete molded body identification information for identifying the molded concrete molded body with information on the siding material to be processed.

[0008] In one embodiment of the present invention, the recovery process may include a step of linking and storing recovery vessel lot identification information for identifying the lot of the recovery vessel used to recover the powder with information on the siding material being processed.

[0009] In one embodiment of the present invention, the recovery process may include a step of storing recovery vessel lot identification information for identifying the lot of a recovery vessel for recovering the powder, information regarding the date and time when at least one set of recovery vessels was set up, and information regarding the date and time when the recovery vessels were removed, in association with each other.

[0010] In another embodiment of the present invention, the method may further include a step of linking and storing concrete molded body identification information for identifying the molded concrete molded body with the collector lot identification information.

[0011] In yet another embodiment of the present invention, the method may include a step of linking and storing concrete molded body identification information for identifying the molded concrete molded body with information on the siding material to be processed or information on the date and time when at least one set of collectors was set up and information on the date and time when the collectors were removed.

[0012] In yet another embodiment of the present invention, in the mixing step, the weight ratio of the cement to the powder may be approximately 1:2.

[0013] In yet another embodiment of the present invention, the processing step may include at least one of a step of cutting the siding material and a step of grinding the siding material.

[0014] In yet another embodiment of the present invention, information regarding the date and time when at least one set of collectors was set in the collector for collecting the powder in the collection process and information regarding the date and time when the collectors were removed may be included. [Effects of the Invention]

[0015] In a method for manufacturing molded concrete bodies according to the present invention, concrete bodies can be formed from powder generated by machines used in cutting and polishing processes, which saves manufacturers of pre-cut siding materials the cost of landfilling the powder. Furthermore, from the perspective of landfill disposal sites, there is no need to bury such powder, freeing up space for other waste disposal.

[0016] The same effect can also be achieved with other methods of manufacturing molded concrete bodies according to the present invention.

[0017] Another embodiment of the present invention includes a step of linking and storing concrete molded body identification information for identifying the molded concrete molded body with information on the siding material to be processed, thereby making it possible to track which concrete molded body contains what type of siding material powder.

[0018] In yet another embodiment of the present invention, a process is included in which concrete molded body identification information for identifying the molded concrete molded body is linked to and stored with information on the siding material to be processed or information on the date and time when at least one set of collectors was set up and information on the date and time when the collectors were removed.Therefore, by taking this information into consideration in conjunction with production information such as production plans or shipping plans for the processed siding material, it is possible to track which concrete molded body contains what kind of siding material powder.

[0019] In yet another embodiment of the present invention, the recovery process includes a step of linking and storing recovery container lot identification information for identifying the lot of the recovery container used to recover the powder, with information about the siding material to be processed or information about the date and time when at least one set of recovery containers was set up and information about the date and time when the recovery containers were removed, thereby making it possible to track which siding material powder is contained in which powder lot.

[0020] In yet another embodiment of the present invention, in the mixing process, the weight ratio of the cement to the powder is approximately 1:approximately 2, and the powder and cement can be mixed well while increasing the amount of powder contained in the concrete molded body.

[0021] In yet another embodiment of the present invention, the processing step includes at least one of a step of cutting the siding material and a step of grinding the siding material, and powder having a diameter of 1 mm or less can be collected.

[0022] In yet another embodiment of the present invention, information regarding the date and time when at least one set of collectors was set in the collector for collecting the powder in the collection process and information regarding the date and time when the collectors were removed can be recorded, making it possible to easily manage the siding material that is the source of the powder collected in the collectors at the concrete molded body manufacturing site. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a schematic diagram showing an example of a concrete molded body manufacturing system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a block diagram showing an example of a method for manufacturing a concrete molded body using the concrete molded body manufacturing system 1. As shown in FIG. [Figure 3] FIG. 3 is a schematic diagram showing an example of a concrete molded body manufacturing system according to an embodiment of the present invention. [Figure 4] FIG. 4 is a block diagram showing an example of a method for manufacturing concrete molded bodies using the concrete molded body manufacturing system 2. As shown in FIG. [Figure 5] FIG. 5(a) is a photograph showing an example of powder collected in the collecting step of the present invention, and FIG. 5(b) is a photograph of crushed material obtained by crushing siding material. [Figure 6] Figure 6(a) is an example of a block formed by mixing the powder shown in Figure 5(a) with cement and water, and Figure 6(b) is an example of a block formed by mixing the crushed material shown in Figure 5(b) with cement and water. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0025] 1 is a schematic diagram showing an example of a molded concrete body manufacturing system according to a first embodiment of the present invention. The molded concrete body manufacturing system 1 according to this embodiment includes a processing machine 10 that generates powder of the siding material 2 when processing the siding material 2, a duct 30 through which the powder passes, a collector 40 that collects the powder of the siding material 2 generated when the processing machine 10 processes the siding material 2, and a mixer 50 that mixes and kneads the powder, cement, and water.

[0026] The processing machine 10 is, for example, a cutting machine that cuts the siding material 2 or a grinding machine that grinds the siding material 2.

[0027] A cutting machine, which is one of the processing machines 10, may be a circular saw. When the cutting machine is a circular saw, the thickness of the circular saw blade is 0.6 to 1.6 mm.

[0028] The duct 30 has a main duct 32 connected to a dust collector 40 and at least one branch duct 34, 36 extending to the vicinity of the cutting machine and / or polishing machine, and the branch ducts 34, 36 are connected to the main duct 32. At least one branch duct 34, 36 has a corresponding suction port 35, 37, and powder ground by the processing machine 10 is sucked in through the suction ports 35, 37, passes through the branch ducts 34, 36 and the main duct 32, and is collected in the dust collector 40. The branch ducts 34, 36 may be branched into two or more branches.

[0029] The dust collector 40 can separate the sucked powder from the air. If the dust collector 40 has a filter, the dust collector 40 may have an exhaust duct (not shown) for discharging the air separated by the filter. Furthermore, for example, the filter can capture powder with a diameter of approximately 0.01 mm or more.

[0030] The collected powder is sent to mixer 50 via a pipe 45 or the like by a conveyor (not shown). If mixer 50 or concrete molded body manufacturing system 1 has a silo (not shown) that can store powder and supply the powder to mixer 50, dust collector 40 may be connected to the silo via a pipe or the like, and the powder may be transported from dust collector 40 to the silo by a conveyor (not shown).

[0031] FIG. 2 is a block diagram showing an example of a method for manufacturing a concrete molded body using the concrete molded body manufacturing system 1. As shown in FIG.

[0032] The method for producing a concrete molded body in this embodiment includes a processing step S10, a suction step S20, a collection step S30, a mixing step S40, and a molding step S50.

[0033] In the processing step S10, the siding material 2 is processed by a processing machine 10. In the concrete molded body manufacturing system of the first embodiment, a cutting machine, which is one of the processing machines 10, cuts the siding material 2. The processing step S10 also includes a case where a grinding machine grinds the siding material 2 instead of the cutting machine.

[0034] In the suction step S20, collector 40 sucks powder generated when siding material 2 is processed through suction port 35. For example, collector 40 sucks powder generated when cutting or grinding siding material 2 through suction port 35. Furthermore, when there are multiple suction ports, multiple cutting machines may be arranged corresponding to the respective suction ports, multiple grinding machines may be arranged, or a cutting machine and a grinding machine may be arranged.

[0035] If the duct 30 is provided with multiple suction ports 35, 37, it is preferable that the suction ports 37 that do not need to suck in powder are closed, in order to prevent air that does not contain powder from being sucked in.

[0036] Suction ports that do not need to suck powder may be closed with a valve or shutter, but suction efficiency may also be improved by blocking the suction port with a light material (e.g., cardboard or resin) that is larger in diameter than the suction port, does not deform to the extent that it is sucked into the duct by suction force, can withstand its own weight, and sticks to the suction port.

[0037] If the collector 40 has a filter (not shown), the powder and air sucked through the suction port 35 are separated by the filter in the collecting step S30, and the powder is collected. The diameter of the collected powder is 1 mm or less. Furthermore, 95% or more of the powder by weight has a diameter of approximately 0.1 mm or less.

[0038] The powder is supplied from the collector 40 to the mixer 50 via a pipe 45 or the like. However, when the processing machine 10 processes a material other than siding material, such as wood, the powder collected by the collector 40 is disposed of without being supplied to the mixer 50. This is because if a concrete molded body is produced using organic powder such as wood, the organic matter may have a negative impact on the environment. For example, when the processing machine 10 processes a material other than siding material, a switching device or the like may send the powder to a waste box or waste bag instead of to the mixer 50.

[0039] If the mixer 50 or the concrete molded body manufacturing system 1 has a silo (not shown) that can store powder and supply a predetermined amount to the mixer 50, the dust collector 40 is connected to the silo by a pipe 45 or the like, and the powder is transported from the dust collector 40 to the silo by a conveyor (not shown). For example, if the processing machine 10 processes a material other than siding material, a switching device or the like may send the powder to a waste box or waste bag instead of to the silo. Note that a switching device or the like may also send the powder to the silo or mixer depending on the siding material.

[0040] In the mixing step S40, a mixer 50 mixes and kneads the collected powder, cement, and water. The weight ratio of cement to powder is preferably approximately 1:2. Theoretically, it is possible to increase the amount of cement beyond this ratio. However, increasing the amount of cement is not preferable because it reduces the amount of powder consumed in the concrete compact.

[0041] It is also possible to slightly increase the amount of powder from the above ratio, but if the amount of powder is increased too much, it will not clump together even when mixed with water.

[0042] The mix may be simply determined so that the weight ratio of cement, powder, and water is approximately 2: approximately 4: approximately 3. The amount of water may also be adjusted as appropriate so that the mixture has a predetermined flowability.

[0043] In the mixing step S40, an additive may be added to control the flowability of the mixed and kneaded material.

[0044] In the molding step S50, the mixed and kneaded material is poured into a form such as a concrete molded body, and then the mixed and kneaded material is vibrated by a vibrator.

[0045] If the form into which the mixed and kneaded material has been poured is large enough to be placed on a vibration table, the form into which the mixed and kneaded material has been poured can be placed on the vibration table and vibrated to remove excess air and distribute the mixed and kneaded material evenly throughout the form.

[0046] Furthermore, if a concrete vibrator can be inserted into the formwork into which the mixed and kneaded material has been poured, the concrete vibrator can be inserted into the formwork into which the mixed and kneaded material has been poured to remove excess air and spread the mixed and kneaded material evenly throughout the formwork.

[0047] After that, the concrete molded body including the formwork is cured, and then the formwork is removed and the concrete molded body is taken out.

[0048] Furthermore, in the method for manufacturing a concrete molded body according to this embodiment, information about the siding material that is the source of the powder mixed in the mixing step S40 and concrete molded body identification information for the concrete molded body that is the mixture mixed and kneaded in the mixing step S40 and then solidified can be linked and stored in a storage device or storage area managed by the worker. The siding material information is information for identifying the siding material, and includes, for example, at least one of the serial number, model number, company name, and product name.

[0049] The concrete molded body identification information is information for identifying the concrete molded body formed in the forming step S50. In order to identify the concrete molded body formed in the forming step S50, the concrete molded body identification information is written on the concrete molded body.

[0050] Therefore, even if foreign matter is mixed into the siding material that is the source of the powder, for example, it is possible to identify the concrete molded body that contains the powder.

[0051] Figure 3 is a schematic diagram showing an example of a concrete molded body manufacturing system according to a second embodiment of the present invention. The concrete molded body manufacturing system 5 in this embodiment includes a processing machine 10 that processes siding material 2, a duct 30 through which the powder passes, a collector 40 that collects the powder of siding material 2 generated when processing machine 10 processes siding material 2, a mixer 50 that mixes and kneads the powder, cement, and water, and a collector 60. In describing the concrete molded body manufacturing system shown in Figure 3, components that are the same as those in the concrete molded body manufacturing system shown in Figure 1 are designated by the same numbers, and descriptions thereof will be omitted.

[0052] The collector 60 is connected to the dust collector 40 and accumulates the powder collected by the dust collector 40. The collector 60 may be a container or a bag.

[0053] FIG. 3 is a block diagram showing an example of a method for manufacturing a concrete molded body by the concrete molded body manufacturing system 5. As shown in FIG.

[0054] The method for producing a concrete molded body in this embodiment includes a processing step S10, a suction step S20, a collection step S30, a recovery step S35, a mixing step S45, and a molding step S55. In the description of the method for producing a concrete molded body shown in Figure 4, the same steps as those in the method for producing a concrete molded body shown in Figure 2 are given the same numbers and their descriptions will be omitted.

[0055] In the collecting step S35, the powder collected in the collecting step S30 is sent to a collector 60 connected to the collector 40.

[0056] Furthermore, when the processing machine 10 processes a material other than siding material, for example, wood, the powder collected by the collector 40 is collected in a collector separate from the one that collects the siding material. In other words, when the processing machine 10 has been processing siding material but then processes a material other than siding material, the collector 60 that was connected to the collector 40 is removed, and a different collector is connected to the collector 40. The collector 60 may be replaced depending on the siding material.

[0057] Next, when processing machine 10 finishes processing materials other than siding material and starts processing siding material, the separate collector connected to collector 40 is removed and collector 60 is connected to collector 40. Finally, the powder other than the siding material collected in the separate collector is discarded.

[0058] In the collecting step S35, when a predetermined amount of powder is collected in a container or bag, which is an example of the collector 60, the container or bag containing the collected powder is collected.

[0059] Information regarding the date and time when a container or bag, which is an example of collector 60, was set in place and information regarding the date and time when the container or bag containing the accumulated powder was removed may be written on the container or bag. By considering this date and time information together with production information such as a production plan or shipping plan for the processed siding material, it is possible to track which lot contains which type of siding material powder. Furthermore, since the date and time information is information necessary to identify the siding material, it may also include information regarding the year, if necessary.

[0060] Furthermore, when the processing machine 10 processes a material other than siding material, the collector 60 is removed and another collector is attached. At that time, information regarding the date and time when the collector 60 was removed is written on the collector 60.

[0061] Next, when the processing machine 10 processes siding material from something other than siding material, the other collector may be removed and the previous collector 60 may be attached. At that time, information regarding the date and time when the previous collector 60 was set up may be written on the previous collector 60. Thereafter, when a predetermined amount of powder has accumulated in the previous collector 60, the previous collector 60 is removed, and information regarding the date and time when the previous collector 60 was removed is written on the previous collector 60. In other words, the collector 60 can store multiple pairs of information regarding the date and time when the collector 60 was set up and the date and time when the collector 60 was removed. Note that when the processing machine 10 processes siding material from something other than siding material, the other collector may be removed and a new collector 60 may be attached instead of the previous collector 60 being attached.

[0062] The collector lot identification information for identifying the lot of the collector 60 may be linked to information regarding the date and time when the collector 60 was set up and information regarding the date and time when the collector 60 was removed, and stored in a storage device or storage area managed by an operator. When such information is linked and stored in a storage device or storage area, and the collector lot identification information is written on the collector 60, it is not necessary to write information regarding the date and time when the collector 60 was set up and information regarding the date and time when the collector 60 was removed on the collector 60. This is because by writing the collector lot identification information on the collector 60, it is possible to manage what type of siding material powder is contained in the collector 60.

[0063] Furthermore, collector lot identification information for identifying the lot of the collector 60 and information about the siding material from which the powder is derived may be linked and stored in a storage device or storage area managed by an operator. The siding material information is information for identifying the siding material, and may include, for example, at least one of the serial number, model number, company name, and product name. In this case, it is not necessary to record information about the date and time the collector 60 was set up and the date and time the collector 60 was removed on the collector 60. This is because recording the collector lot identification information on the collector 60 makes it possible to manage the type of siding material powder contained in the collector 60.

[0064] In the mixing step S45, the mixer 50 mixes and kneads the powder, cement, and water. The powder may be directly charged from the collector 60 to the mixer 50, or may be transferred from the collector 60 to a silo or the like and then charged into the mixer 50. The powder charged into the mixer 50 may also be a mixture of powders from multiple collectors 60.

[0065] It is preferable that the weight ratio of cement to powder is approximately 1:2. In theory, it is possible to increase the amount of cement beyond this ratio. However, increasing the amount of cement is not preferable because it reduces the amount of powder consumed in the concrete molded body.

[0066] It is also possible to increase the amount of powder beyond the above ratio, but if the amount of powder is increased too much, it will not clump together even when mixed with water.

[0067] The mix may be simply determined so that the weight ratio of cement, powder, and water is approximately 2: approximately 4: approximately 3. The amount of water may also be adjusted as needed so that the mixture has a predetermined flowability.

[0068] In the mixing step S45, an additive may be added to control the flowability of the mixed and kneaded material.

[0069] In the molding step S55, the mixed and kneaded material is poured into a form such as a concrete molded body. The mixed and kneaded material is then vibrated by a vibrator. If the form into which the mixed and kneaded material has been poured is large enough to fit on a vibration table, the form into which the mixed and kneaded material has been poured can be placed on the vibration table and vibrated to remove excess air and distribute the mixed and kneaded material evenly throughout the form.

[0070] Furthermore, if a concrete vibrator can be inserted into the formwork into which the mixed and kneaded material has been poured, the concrete vibrator can be inserted into the formwork into which the mixed and kneaded material has been poured to remove excess air and spread the mixed and kneaded material evenly throughout the formwork.

[0071] After that, the concrete molded body together with the formwork is cured, and then the formwork is removed and the concrete molded body is taken out. After the formwork is removed, concrete molded body lot identification information may be written on the concrete molded body to identify the lot of the concrete molded body.

[0072] Concrete molded body lot identification information for identifying the lot of a concrete molded body and collector lot identification information may be linked and stored in a storage device or storage area managed by an operator. In this case, the type of siding material powder contained in the concrete molded body can be managed using the concrete molded body lot identification information written on the concrete molded body. Furthermore, if a concrete molded body is manufactured using powder from multiple lots of collectors, the concrete molded body lot identification information and the multiple collector lot identification information may be linked and stored in a storage device or storage area managed by an operator.

[0073] Furthermore, concrete molded body lot identification information for identifying the lot of a concrete molded body, information regarding the date and time when at least one set of collectors 60 was set up, and information regarding the date and time when the collectors 60 were removed may be linked and stored in a storage device or storage area managed by an operator. In this case, the type of siding material powder contained in the concrete molded body can be managed using the concrete molded body lot identification information written on the concrete molded body. Furthermore, when concrete molded bodies are manufactured using powder from multiple lots of collectors, the concrete molded body lot identification information, information regarding the date and time when the multiple sets of collectors 60 were set up, and information regarding the date and time when the collectors 60 were removed may be linked and stored in a storage device or storage area managed by an operator.

[0074] Furthermore, concrete molded body lot identification information for identifying the lot of the concrete molded body and information on the siding material from which the powder is derived may be linked and stored in a storage device or storage area managed by an operator. In this case, the type of siding material powder contained in the concrete molded body can be managed by the concrete molded body lot identification information written on the concrete molded body.

[0075] Below, using Figures 5 and 6, we will explain the difference between a block formed by mixing the powder, cement, and water accumulated in the collection process of the present invention, and a block formed by mixing crushed material obtained by pressing siding material against a rotary blade and crushing it until it passes through a punching screen with multiple holes with a diameter of 1 cm, cement, and water.

[0076] Figure 5(a) is a photograph showing an example of powder accumulated in the collection process of the present invention. A disposable lighter is placed in the lower left corner of Figure 5(a) for size comparison. Figure 5(b) is a photograph of crushed siding material that was pressed against a rotary blade and crushed until it passed through a punching screen with multiple 1-cm diameter holes.

[0077] Figure 6(a) shows an example of a block formed by mixing the powder shown in Figure 5(a) with cement and water (hereinafter referred to as the block of the present invention). Figure 6(b) shows an example of a block formed by mixing the crushed material shown in Figure 5(b) with cement and water (hereinafter referred to as the crushed block).

[0078] The surface of the block of the present invention is smoother than the surface of a crushed block, and can withstand user use without requiring any additional processing on the surface of the block.

[0079] On the other hand, the surface of the crushed blocks is rougher than the surface of the blocks of the present invention, and it can be said that the surface of the crushed blocks can be subjected to new processing or the crushed blocks can be used as a base material for structures.

[0080] Because of this difference in appearance, the blocks of the present invention have a market advantage over crushed blocks. Furthermore, it is possible to apply new processing to the surface of the blocks of the present invention, and to use the blocks of the present invention as a base material for structures. [Explanation of symbols]

[0081] 1, 5 Concrete molding manufacturing system 2. Siding materials 10 Processing machine 30 Duct 32 Main duct 34, 36 Branch duct 35, 37 Suction port 40 Dust collector 45 Pipe 50 Mixer 60 Recoverer

Claims

1. a processing step of generating powder of the siding material when processing the siding material; a suction step of suctioning the powder; a collecting step of collecting the sucked powder; a recovery step in which the collected powder is recovered when it reaches a certain amount; a mixing step of mixing and kneading the recovered powder, cement, and water; A method for producing a molded concrete body, comprising a molding step of pouring the kneaded mixture into a mold to form a molded concrete body.

2. a processing step of generating powder of the siding material when processing the siding material; a suction step of suctioning the powder; a collecting step of collecting the sucked powder; a mixing step of mixing and kneading the collected powder, cement, and water; A method for producing a molded concrete body, comprising a molding step of pouring the kneaded mixture into a mold to form a molded concrete body.

3. 3. A method for manufacturing a concrete molded body according to claim 1, further comprising a step of storing concrete molded body identification information for identifying the molded concrete molded body and information on the siding material to be processed in association with each other.

4. A method for manufacturing a concrete molded body as described in claim 1, which includes a step of linking and storing collector lot identification information for identifying the lot of the collector used to collect the powder in the collection step with information on the siding material to be processed or information on the date and time when at least one set of collectors was set up and information on the date and time when the collectors were removed.

5. 5. The method for manufacturing a concrete molded body according to claim 4, further comprising a step of storing concrete molded body identification information for identifying the molded concrete molded body in association with the collector lot identification information.

6. A method for manufacturing concrete molded bodies as described in claim 1, which includes a step of linking and storing concrete molded body identification information for identifying the molded concrete molded body with information regarding the date and time when at least one set of recovery devices was set and information regarding the date and time when the recovery devices were removed.

7. 3. The method for manufacturing a concrete molded body according to claim 1, wherein in the mixing step, the weight ratio of the cement to the powder is approximately 1:

2.

8. 3. The method for manufacturing a molded concrete body according to claim 1, wherein the processing step includes at least one of a step of cutting the siding material and a step of polishing the siding material.

9. A method for manufacturing a concrete molded body as described in claim 1, wherein information regarding the date and time when at least one set of collectors was set in the collector for collecting the powder in the collection process and information regarding the date and time when the collectors were removed are recorded.

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