Mobile device for manufacturing paving material and method for manufacturing paving material

Abstract

Provided is a mobile device 1 for manufacturing a paving material containing a recycled subbase material, a solidification material, water, and an asphalt emulsion, the device comprising: a mixer 10; a conveyor 20 for supplying the recycled subbase material to the mixer 10; a hopper 30 for storing the solidification material supplied to the mixer 10; an emulsion addition device 40 for supplying the asphalt emulsion to the mixer 10; a water addition device 50 for supplying water to the mixer 10; and a moving device 60.

Description

Mobile paving material manufacturing device and method for manufacturing paving material

[0001] The present invention relates to a mobile paving material manufacturing apparatus and a method for manufacturing paving material.

[0002] A stabilized cement-asphalt emulsion (CAE) mixture is known as a road paving material. It is produced by mixing recycled roadbed material, cement, asphalt emulsion, and water. Such CAE mixtures are usually produced by a so-called central mixing method using a plant (see, for example, Patent Document 1).

[0003] JP 2014-047458 A

[0004] In order to carry out construction using a CAE mixture manufactured by the central mixing method, the manufactured CAE mixture must be transported from the manufacturing plant to the construction site. Therefore, the central mixing method has the problem that construction sites where construction using the CAE mixture can be carried out are limited to a certain range from the manufacturing plant. In light of this background, there has been a demand for a method of manufacturing the CAE mixture on-site so that construction using the CAE mixture can be carried out at any construction site.

[0005] The problem to be solved by the present invention is to provide a mobile paving material manufacturing device and a paving material manufacturing method that are capable of manufacturing paving material at a construction site.

[0006] As a result of intensive research into solving the above problems, the inventors discovered that the above problems could be solved by a mobile manufacturing device for paving materials that includes a mixer, a conveyor that supplies recycled roadbed material to the mixer, a hopper that stores the solidification material that is supplied to the mixer, an emulsion adding device that supplies asphalt emulsion to the mixer, a water adding device that supplies water to the mixer, and a moving device, and thus completed the present invention.

[0007] [1] According to aspect 1 of the present invention, there is provided a mobile manufacturing apparatus for paving material containing recycled roadbed material, solidifying agent, water, and asphalt emulsion, the mobile manufacturing apparatus for paving material comprising: a mixer; a conveyor for supplying recycled roadbed material to the mixer; a hopper for storing the solidifying agent to be supplied to the mixer; an emulsion adding device for supplying the asphalt emulsion to the mixer; a water adding device for supplying the water to the mixer; and a moving device.

[0008] [2] According to aspect 2 of the present invention, there is provided a mobile paving material manufacturing apparatus according to aspect 1, wherein the emulsion adding device is equipped with an emulsion supply nozzle that sprays the asphalt emulsion into the mixer, and the attachment position of the emulsion supply nozzle on the emulsion adding device is changeable, and the spray angle of the asphalt emulsion relative to the mixer is changeable.

[0009] [3] According to aspect 3 of the present invention, there is provided a mobile paving material manufacturing apparatus of aspect 2, wherein the emulsion addition device is attached to the emulsion supply nozzle and has an emulsion diffusion member arranged so as to intersect with an imaginary line along the central axis of the emulsion supply nozzle.

[0010] [4] According to aspect 4 of the present invention, there is provided a mobile paving material manufacturing apparatus according to any one of aspects 1 to 3, wherein the water addition device is equipped with a water supply nozzle that sprays the water into the mixer, and the installation position of the water supply nozzle on the water addition device is changeable, and the spray angle of the water relative to the mixer is changeable.

[0011] [5] According to aspect 5 of the present invention, there is provided a mobile paving material manufacturing apparatus of aspect 4, wherein the water addition device is attached to the water supply nozzle and has a water diffusion member arranged so as to intersect with an imaginary line along the central axis of the water supply nozzle.

[0012] [6] According to aspect 6 of the present invention, there is provided a method for manufacturing paving material containing recycled roadbed material, hardening material, water, and asphalt emulsion using the mobile manufacturing apparatus for paving material of any of aspects 1 to 5, the method comprising the steps of: supplying the recycled roadbed material to the mixer using the conveyor; supplying the water to the mixer using the water adding device and mixing it with the recycled roadbed material; supplying the hardening material to the mixer and mixing it with the water and the recycled roadbed material; and supplying the asphalt emulsion to the mixer using the emulsion adding device and mixing it with the recycled roadbed material, the water, and the hardening material.

[0013] According to the present invention, it is possible to provide a mobile paving material manufacturing device that can manufacture paving material at a construction site.

[0014] Fig. 1 is a cross-sectional view showing the configuration of a mobile paving material manufacturing apparatus in a first embodiment of the present invention. Fig. 2 is a view corresponding to part II in Fig. 1. Fig. 3 is a cross-sectional view taken along line III-III in Fig. 2. Fig. 4 is a perspective view showing the structure of a nozzle unit in a first embodiment of the present invention. Fig. 5 is a plan view showing the structure of a nozzle unit in a first embodiment of the present invention. Fig. 6 is a cross-sectional view showing the configuration of a mobile paving material manufacturing apparatus in a second embodiment of the present invention.

[0015] <<First embodiment>> Figure 1 is a cross-sectional view showing the configuration of a mobile paving material manufacturing device according to the first embodiment, Figure 2 is a view corresponding to part II in Figure 1, and Figure 3 is a cross-sectional view taken along line III-III in Figure 2.

[0016] As shown in Figure 1, the mobile manufacturing apparatus 1 in this embodiment includes a mixer 10, a conveyor 20, a solidification material hopper 30, an emulsion adding device 40, a water adding device 50, and a moving device 60. The mobile manufacturing apparatus 1 is an apparatus for manufacturing paving materials containing recycled roadbed material, a solidification material, an asphalt emulsion, and water. Examples of such paving materials include cement-asphalt emulsion stabilized mixtures (hereinafter also referred to as CAE mixtures).

[0017] The recycled roadbed material (recycled aggregate) used in this embodiment can be, for example, a material obtained by crushing concrete waste generated as construction waste and classifying it as necessary. The particle size of the recycled roadbed material is preferably 0 to 60 mm, more preferably 0 to 40 mm.

[0018] The solidifying agent used in this embodiment is not particularly limited as long as it reacts with the moisture in the asphalt emulsion to harden and increase the strength of the resulting paving material. Examples of solidifying agents include cement and ground granulated blast furnace slag. Examples of cement include Portland cement, blast furnace cement, silica cement, and fly ash cement. Of these, ordinary Portland cement is preferred because it can improve the strength of the resulting paving material. Ground granulated blast furnace slag is a powder obtained by finely pulverizing granulated blast furnace slag, which is produced when pig iron is produced in a blast furnace at a steelworks.

[0019] An asphalt emulsion is a dispersion of asphalt in the form of fine particles in water containing an emulsifier. There are no particular limitations on the asphalt emulsion, and any known asphalt emulsion can be used. For example, it may be a nonionic, anionic, or cationic asphalt emulsion.

[0020] The mixer 10 is a device that mixes recycled roadbed material, a hardener, asphalt emulsion, and water to produce a paving material (CAE mixture). The mixer 10 is installed in a mixing chamber 11 supported by a support 61 of a moving device 60 (described later). As described later, the mixing chamber 11 containing the mixer 10 is connected to devices that supply the materials that make up the paving material (a conveyor 20, a hardener hopper 30, an emulsion adding device 40, and a water adding device 50). The mixer 10 is equipped with mixing blades 13, and the paving material produced by the mixer 10 is transported by the mixing blades 13 to a discharge port 12 and discharged from the discharge port 12 onto a product conveyor 70. Any known mixer can be used as the mixer 10, and is not particularly limited. For example, a two-shaft pugmill-type mixer or the like can be suitably used.

[0021] The rotation speed of the mixer 10 is preferably 30 to 110 rpm, and more preferably 40 to 60 rpm. By setting the rotation speed of the mixer 10 within the above range, the mixing properties of the recycled roadbed material and the like can be improved.

[0022] The conveyor 20 is a device that transports recycled roadbed material and feeds it into the mixer 10, and is arranged so that a portion of it enters the mixing chamber 11. There are no particular limitations on the conveyor 20, and a known belt conveyor or the like can be used. The recycled roadbed material is stored in a roadbed material hopper 21, and is supplied to the conveyor 20 from a discharge outlet 22 when producing paving material. Although not particularly limited, the recycled roadbed material is fed into the roadbed material hopper 21 using heavy machinery such as a shovel. In FIG. 1, arrow A indicates the flow of the recycled roadbed material. Although not particularly limited, the roadbed material hopper 21 may be provided with a screen 23 for removing impurities from the recycled roadbed material.

[0023] The solidification material hopper 30 is a hopper for storing the solidification material, and a known one can be used. The discharge outlet 31 of the solidification material hopper 30 is connected to the mixing chamber 11 in which the mixer 10 is provided, making it possible to supply the solidification material to the mixer 10. Although not particularly limited, the solidification material hopper 30 is provided with a screw feeder (not shown), which makes it possible to adjust the amount of solidification material supplied. In FIG. 1, arrow B indicates the flow of the solidification material.

[0024] The emulsion adding device 40 supplies asphalt emulsion to recycled roadbed material introduced into the mixer 10. The emulsion adding device 40 includes a nozzle unit 41, a flow path 42, a pump 43, and a tank 44. As shown in FIGS. 2 and 3 , the nozzle unit 41 includes a spray bar 46, multiple nozzles 47, and a diffusion member 48 attached to each nozzle 47. As shown in FIG. 1 , the nozzle unit 41 is attached to the mixing chamber 11 of the mixer 10. The nozzle unit 41 is an attachment type and can be removed from the mixing chamber 11. That is, the emulsion adding device 40 can be removed from the mixing chamber 11 by attaching and detaching the nozzle unit 41. The nozzle unit 41 can be attached to a different position in the mixing chamber 11. The nozzle unit 41 can be attached to a different position (exchangeable) with a nozzle unit 51 of the water adding device 50 (described later). The nozzle 47 is attached to the spray bar 46 toward the mixer 10. 2, the angle of the nozzles 47 relative to the spray bar 46 can be set as desired, making it possible to adjust the angle at which the asphalt emulsion is sprayed onto the recycled roadbed material fed into the mixer 10. In addition, the attachment angle of each of the multiple nozzles 47 relative to the spray bar 46 can be set independently.

[0025] FIG. 4 is a perspective view showing the structure of the nozzle unit 41 in this embodiment, and FIG. 5 is a plan view showing the structure of the nozzle unit 41 in this embodiment.

[0026] The diffusion member 48 is a member for diffusing the asphalt emulsion supplied from the nozzle 47 into the mixing chamber 11. As shown in FIG. 4 , the diffusion member 48 includes a diffusion section 481 and a connection section 482 that connects the diffusion section 481 to the nozzle 47. The diffusion section 481 is composed of a member having a curved surface (surface 483) that protrudes in the discharge direction of the nozzle 47 (downward in the Z direction in the figure). The connection section 482 is composed of a bent rod-shaped member, one end of which is connected to the side of the nozzle 47 and the other end of which is connected to the diffusion section 481.

[0027] The diffusion section 481 is disposed so that an imaginary line along the central axis L of the nozzle 47 intersects with the surface 483 so that the asphalt emulsion discharged from the nozzle 47 comes into contact with the surface 483. Although not particularly limited, as shown in Figure 5, an edge 484 of the surface 483 has an elliptical shape when viewed along the extension direction of the nozzle 47 (Z direction in the figure). The size of the diffusion section 481 is such that the discharge port 471 of the nozzle 47 is encompassed by the surface 483 when viewed along the extension direction of the nozzle 47 (Z direction in the figure).

[0028] 2, the diffusion section 481 is provided at an angle with respect to the nozzle 47 so that the distance from the connection section 482 in the X direction in the figure increases, and the distance from the outlet 471 of the nozzle 47 in the Z direction increases. The angle of inclination θ of the diffusion section 481 is expressed as the angle of the extension direction of the nozzle 47 (the direction of discharging the asphalt emulsion, the Z direction in the figure) with respect to the plane defined by the edge section 484, and is preferably 100° to 150°, and more preferably 110° to 140°. The angle of inclination θ of the diffusion sections 481 provided in each nozzle 47 may all be the same, or may be set individually for each.

[0029] The diffusion portion 481 is made of, but is not limited to, a metallic material such as stainless steel. The connecting portion 482 may be made of the same material as the diffusion portion 481. The diffusion portion 481 and the connecting portion 482 are connected by, but is not limited to, welding or the like. The diffusion portion 481 and the connecting portion 482 may be molded as an integrated member.

[0030] Although the diffusion section 481 in this embodiment has a curved surface, the shape of the diffusion section 481 is not particularly limited as long as it has a structure that can diffuse the asphalt emulsion supplied from the nozzle 47. For example, the diffusion section 481 may be formed of a plate-like member having a flat surface.

[0031] The asphalt emulsion discharged from the nozzle 47 comes into contact with the surface 483 of the diffusing member 48, runs along the surface 483, and scatters outward from the edge 484, or bounces off the surface 483 and scatters in all directions. This allows the asphalt emulsion to be widely dispersed within the mixing chamber 11, improving the mixability of the asphalt emulsion with the recycled roadbed material, etc.

[0032] The nozzle unit 41 is connected to a pump 43 and a tank 44 via a flow path 42. The emulsion adding device 40 sprays the asphalt emulsion stored in the tank 44 from the nozzle unit 41 via the flow path 42 into the mixing chamber 11 at a predetermined flow rate using the pump 43. In Figure 1, arrow C indicates the flow of the asphalt emulsion. The pump 43 is an inverter-type pump, which makes it possible to set the flow rate of the asphalt emulsion as desired.

[0033] The water addition device 50 supplies water to the recycled roadbed material introduced into the mixer 10. The water addition device 50 includes a nozzle unit 51, a flow path 52, a pump 53, and a tank 54. The nozzle unit 51 includes a spray bar 56, a plurality of nozzles 57, and a diffusion member 58 attached to each nozzle 57, and is attached to the mixing chamber 11 in which the mixer 10 is provided. The nozzle unit 51 is an attachment type and can be removed from the mixing chamber 11. In other words, the water addition device 50 can be removed from the mixing chamber 11 by attaching and detaching the nozzle unit 51. Furthermore, the attachment position of the nozzle unit 51 in the mixing chamber 11 is changeable. Furthermore, the attachment position of the nozzle unit 51 relative to the nozzle unit 41 of the emulsion addition device 40 is changeable.

[0034] As shown in FIG. 2 , the nozzles 57 are attached to the spray bar 56 and point toward the mixer 10. The angle of the nozzles 57 can be adjusted as desired, thereby adjusting the spray angle of water onto the recycled roadbed material introduced into the mixer 10. Furthermore, as shown in FIG. 4 , the diffusing member 58 includes a diffusing portion 581 and a connecting portion 582, similar to the configuration of the diffusing member 48 of the nozzle unit 41. The inclination angles of the diffusing portions 581 attached to each nozzle 57 relative to the nozzle 57 may all be the same, or may be individually set. By including the diffusing member 58 in the nozzle unit 51, water ejected from the nozzles 57 contacts the surface 583 of the diffusing member 58 and either runs along the surface 583 and splashes outward from the edge 584, or bounces off the surface 583 and splashes in all directions. This allows the water to be widely dispersed within the mixing chamber 11, improving the mixing efficiency of the water and the recycled roadbed material.

[0035] As shown in FIG. 1 , the nozzle unit 51 is connected to a pump 53 and a tank 54 via a flow path 52. The water addition device 50 sprays water stored in the tank 54 from the nozzle unit 51 through the flow path 52 into the mixing chamber 11 at a predetermined flow rate using the pump 53. In FIG. 1 , arrow D indicates the flow of water. The pump 53 is an inverter-type pump, and the water flow rate can be set as desired. The water supply source for the water addition device 50 may be the water facility at the construction site, in which case the water addition device 50 does not need to be equipped with a tank 54.

[0036] The moving device 60 is a moving mechanism for moving the mobile manufacturing apparatus 1, and a known moving device can be used. For example, a caterpillar can be used as the moving device 60. In this embodiment, the mixing chamber 11 of the mixer 10, the conveyor 20, etc. are provided on a support part 61 of the moving device 60.

[0037] It should be noted that known mobile devices such as soil improvement machines equipped with the roadbed material hopper 21, conveyor 20, solidification material hopper 30, mixer 10, and mobile device 60 may be used. The emulsion adding device 40 and water adding device 50 in this embodiment can be attached to such known mobile devices.

[0038] The paving material can be manufactured using the mobile manufacturing apparatus 1 in this embodiment as follows: That is, the paving material can be manufactured using a manufacturing method including the steps of using the conveyor 20 to supply recycled road base material to the mixer 10, using the water adding device 50 to supply water to the mixer 10 and mix it with the recycled road base material, supplying a hardening agent to the mixer 10 and mixing it with the water and recycled road base material, and using the emulsion adding device 40 to supply asphalt emulsion to the mixer 10 and mix it with the recycled road base material, water, and hardening agent.

[0039] Specifically, first, recycled roadbed material discharged from the roadbed material hopper 21 is supplied to the mixer 10 by the conveyor 20. It is preferable to measure the moisture content of the recycled roadbed material before feeding it into the roadbed material hopper 21. Methods for measuring the moisture content of recycled roadbed material include, for example, a method conforming to JIS A 1203. Next, the recycled roadbed material and water are mixed in the mixer 10 while the water addition device 50 supplies water to the mixer 10. At this time, the flow rate of water supplied from the pump 53 is set taking into consideration the moisture content of the recycled roadbed material and the required characteristics of the paving material to be manufactured. The water supplied by the pump 53 is discharged from the nozzle 57 of the nozzle unit 51, contacts the diffusion member 58, and is sprayed toward the mixer 10.

[0040] Next, the solidification material is supplied to the mixer 10, and the recycled road base material, water, and solidification material are mixed by the mixer 10. The amount of solidification material supplied is adjusted by a screw feeder according to the amount of recycled road base material added.

[0041] Next, the mixer 10 mixes the recycled roadbed material, water, solidifying agent, and asphalt emulsion while supplying the asphalt emulsion to the mixer 10 via the emulsion adding device 40. The amount of asphalt emulsion supplied from the pump 43 is set based on the input rate of recycled roadbed material per hour (kg / h), calculated from the rotation speed of the rollers 26 of the conveyor 20, taking into account the required characteristics of the paving material to be manufactured. The asphalt emulsion supplied by the pump 43 is discharged from the nozzle 47 of the nozzle unit 41, contacts the diffusion member 48, and is sprayed toward the mixer 10. The mixture of recycled roadbed material, water, solidifying agent, and asphalt emulsion (paving material) is transported to the discharge port 12 by the rotation of the mixer 10, discharged from the discharge port 12 onto the product conveyor 70, and collected as a product by the product conveyor 70. In FIG. 1 , arrow Z indicates the flow of the manufactured paving material.

[0042] In this manner, a paving material containing recycled roadbed material, solidifying agent, asphalt emulsion, and water is produced. In this embodiment, water, solidifying agent, and asphalt emulsion are supplied to the recycled roadbed material in this order and mixed, but the order in which the materials are supplied is not particularly limited to this. For example, after the recycled roadbed material is introduced into the mixer 10, the materials may be supplied in the order of solidifying agent, water, and asphalt emulsion, or in any other order. The order in which the materials are supplied and mixed can be selected appropriately depending on the required properties of the paving material to be produced.

[0043] The mobile manufacturing apparatus 1 in this embodiment is equipped with a moving device 60 and can be moved to any location, such as a construction site. Therefore, the mobile manufacturing apparatus 1 in this embodiment makes it possible to manufacture paving materials at construction sites.

[0044] In this embodiment, the water addition device 50 is equipped with a nozzle 57, and the spray angle of the water can be changed by changing the angle of the nozzle 57. Similarly, the emulsion addition device 40 is equipped with a nozzle 47, and the spray angle of the asphalt emulsion can be changed by changing the angle of the nozzle 47. Furthermore, the attachment positions of the nozzle unit 41 and the nozzle unit 51 in the mixing chamber 11 can be changed. This makes it possible to adjust the spray angle and spray order of the water and asphalt emulsion onto the recycled roadbed material, thereby improving the mixability of the materials.

[0045] In this embodiment, a diffusion member 58 is provided on the nozzle 57 of the water adding device 50, and a diffusion member 48 is provided on the nozzle 47 of the emulsion adding device 40. This allows the water and asphalt emulsion to be sprayed in a diffused manner within the mixing chamber 11, further improving the mixability of the materials.

[0046] In this embodiment, the emulsion adding device 40 and the water adding device 50 are each attachment-type and can be attached to and detached from the mixing chamber 11, the conveyor 20, etc. Therefore, the emulsion adding device 40 and the water adding device 50 can be attached to a known mobile device such as a soil improvement machine equipped with a roadbed material hopper 21, a conveyor 20, a solidification material hopper 30, a mixer 10, and a moving device 60, and used as the mobile manufacturing device 1 in this embodiment.

[0047] Second Embodiment FIG. 6 is a cross-sectional view showing the configuration of a mobile manufacturing apparatus 1B according to a second embodiment.

[0048] As shown in Figure 6, the mobile manufacturing apparatus 1B of the second embodiment differs from the mobile manufacturing apparatus 1 of the first embodiment in that it is equipped with a continuous moisture content meter 24 and a water addition amount determination device 25, that the emulsion addition device 40B is equipped with a control device 45, and that the water addition device 50B is equipped with a control device 55. However, except for the above points, the configuration of the mobile manufacturing apparatus 1B is the same as that of the mobile manufacturing apparatus 1 of the first embodiment. Below, only the differences between the mobile manufacturing apparatus 1B of the second embodiment and the first embodiment will be described, and the same components as those of the first embodiment will be assigned the same reference numerals and will not be described again.

[0049] The mobile manufacturing apparatus 1B in this embodiment is provided with a continuous moisture content meter 24 that is attached to the conveyor 20 and measures the amount of moisture (moisture content) contained in the recycled road base material. As the continuous moisture content meter 24, for example, an infrared moisture meter, a halogen moisture meter, or the like can be used. The continuous moisture content meter 24 is provided near the discharge outlet 22 for the recycled road base material and is capable of continuously measuring the amount of moisture contained in the recycled road base material transported by the conveyor 20. The continuous moisture content meter 24 outputs the measured moisture content to a water addition amount determination device 25, which will be described later. The continuous moisture content meter 24 is an attachment type that is detachable from the conveyor 20.

[0050] The mobile manufacturing apparatus 1B in this embodiment also includes a water addition amount determination device 25 connected to the continuous moisture meter 24 and installed on the conveyor 20. The water addition amount determination device 25 compares the moisture content required for the paving material to be manufactured with the moisture content of the recycled roadbed material measured by the continuous moisture meter 24 to calculate the amount of water to be supplied to the mixer 10. The calculation function of the water addition amount determination device 25 is not particularly limited, but is realized by a computer equipped with a CPU, main memory device (RAM, etc.), secondary memory device (hard disk, SSD, etc.), and interface, etc. The water addition amount determination device 25 outputs the calculated amount of water to be supplied to the control device 55 (described below) of the water addition device 50. Note that the water addition amount determination device 25 may calculate the amount of water to be supplied by taking into account not only the moisture content of the recycled roadbed material but also the input amount of recycled roadbed material per hour [kg / h] calculated from the rotation speed of the roller 26 of the conveyor 20, etc. The water addition amount determining device 25 may also calculate the amount of water to be supplied depending on the required characteristics of the paving material to be manufactured. The water addition amount determining device 25 is an attachment type that can be attached to and detached from the conveyor 20.

[0051] In addition, when known mobile devices such as soil improvement machines are used as the roadbed material hopper 21, conveyor 20, solidification material hopper 30, mixer 10, and mobile device 60, the continuous moisture content meter 24 and water addition amount determination device 25 may be attached to such known mobile devices.

[0052] The emulsion adding device 40B in this embodiment is equipped with a control device 45 that controls the flow rate of asphalt emulsion supplied by the pump 43. The control device 45 is equipped with a computer (not shown), and determines the flow rate of the asphalt emulsion based on the rotation speed of the rollers 26 of the conveyor 20 (i.e., the amount of recycled roadbed material added per hour), and adjusts the flow rate of the pump 43. Note that the control device 45 may adjust the flow rate of the asphalt emulsion independently without taking into account the amount of recycled roadbed material added.

[0053] The water addition device 50B in this embodiment is equipped with a control device 55 that controls the flow rate of water supplied by the pump 53. The control device 55 is equipped with a computer (not shown) and adjusts the flow rate of the pump 53 based on the amount of water supply calculated by the water addition amount determination device 25. Note that the water supply source for the water addition device 50B may be the water supply facility at the construction site, in which case the water addition device 50B does not need to be equipped with the tank 54.

[0054] The paving material can be manufactured using the mobile manufacturing apparatus 1B in this embodiment as follows: That is, the paving material can be manufactured using a manufacturing method including the steps of using the conveyor 20 to supply recycled road base material to the mixer 10, using the water adding device 50B to supply water to the mixer 10 and mix it with the recycled road base material, supplying a hardening agent to the mixer 10 and mixing it with the water and recycled road base material, and using the emulsion adding device 40B to supply asphalt emulsion to the mixer 10 and mix it with the recycled road base material, water, and hardening agent.

[0055] Specifically, first, recycled roadbed material discharged from roadbed material hopper 21 is supplied to mixer 10 by conveyor 20. As the recycled roadbed material is transported by conveyor 20, the moisture content of the recycled roadbed material is continuously measured by continuous moisture content meter 24. Furthermore, water addition amount determination device 25 calculates the supply rate of water [L / h] to be supplied to mixer 10 based on the measured moisture content of the recycled roadbed material and the input amount of recycled roadbed material calculated from the rotation speed of roller 26 of conveyor 20, etc. The calculated water supply rate is successively transmitted to control device 55 of water addition device 50B.

[0056] Next, the water addition device 50B supplies water to the mixer 10, while the mixer 10 mixes the recycled roadbed material and water. At this time, the control device 55 of the water addition device 50B adjusts the flow rate of the pump 53 based on the amount of water supply transmitted from the water addition amount determination device 25. The water supplied by the pump 53 is sprayed toward the mixer 10 from the nozzle 57 of the nozzle unit 51.

[0057] Next, the solidification material is supplied to the mixer 10, and the recycled road base material, water, and solidification material are mixed by the mixer 10. The amount of solidification material supplied is adjusted by a screw feeder according to the amount of recycled road base material added.

[0058] Next, the mixer 10 mixes the recycled roadbed material, water, solidifying agent, and asphalt emulsion while supplying the asphalt emulsion to the mixer 10 using the emulsion adding device 40B. The control device 45 determines the flow rate of the asphalt emulsion based on the amount of recycled roadbed material added and adjusts the flow rate of the pump 43. The mixture of recycled roadbed material, water, solidifying agent, and asphalt emulsion (paving material) is transported to the discharge port 12 by the rotation of the mixer 10, discharged from the discharge port 12 onto the product conveyor 70, and collected as a product by the product conveyor 70. In FIG. 6, arrow Z indicates the flow of the produced paving material. In this embodiment, the order of supplying the materials is not limited to the above and can be selected appropriately depending on the desired properties of the paving material to be produced.

[0059] The mobile manufacturing apparatus 1B in this embodiment is equipped with a moving device 60 and can be moved to any location, such as a construction site. Therefore, the mobile manufacturing apparatus 1B in this embodiment makes it possible to manufacture paving materials at construction sites.

[0060] Furthermore, the mobile manufacturing device 1B in this embodiment is equipped with a continuous moisture content meter 24 that measures the moisture content of the recycled road base material. This eliminates the need to measure the moisture content of the recycled road base material in advance, thereby reducing the time required to manufacture paving material.

[0061] The mobile manufacturing apparatus 1B in this embodiment is also equipped with a water addition amount determination device 25 that determines the amount of water to be supplied depending on the moisture content of the recycled road base material. This makes it possible to continuously manufacture paving material by changing the amount of water to be supplied even if the moisture content of the recycled road base material changes during production.

[0062] It should be noted that the above-described embodiments have been described to facilitate understanding of the present invention, and are not intended to limit the present invention. Therefore, the elements disclosed in the above embodiments are intended to include all design modifications and equivalents that fall within the technical scope of the present invention.

[0063] DESCRIPTION OF SYMBOLS 1, 1B... Mobile manufacturing apparatus 10... Mixer 11... Mixing chamber 12... Discharge outlet 13... Mixing blade 20... Conveyor 21... Roadbed material hopper 22... Discharge outlet 23... Screen 24... Continuous moisture content meter 25... Water addition amount determination device 26... Roller 30... Solidification material hopper 31... Discharge outlet 40, 40B... Emulsion addition device 41... Nozzle unit 46... Spray bar 47... Nozzle 48... Diffusion member 481... Diffusion section 482... Connection section 483... Surface 484... Edge section 42... Flow path 43... Pump 44... Tank 45... Control device 50, 50B... Water addition device 51... Nozzle unit 56... Spray bar 57... Nozzle 58... Diffusion member 581... Diffusion section 582... Connection section 583... Surface 584... Edge section 52: Flow path 53: Pump 54: Tank 55: Control device 60: Moving device 61: Support portion 70: Product conveyor

Claims

1. A mobile manufacturing apparatus for paving material containing recycled roadbed material, solidifying agent, water, and asphalt emulsion, comprising: a mixer; a conveyor for supplying recycled roadbed material to the mixer; a hopper for storing the solidifying agent to be supplied to the mixer; an emulsion adding device for supplying the asphalt emulsion to the mixer; a water adding device for supplying the water to the mixer; and a moving device.

2. A mobile paving material manufacturing apparatus as described in claim 1, wherein the emulsion adding device is equipped with an emulsion supply nozzle that sprays the asphalt emulsion into the mixer, and the attachment position of the emulsion supply nozzle on the emulsion adding device is changeable, and the spray angle of the asphalt emulsion relative to the mixer is changeable.

3. A mobile paving material manufacturing apparatus as described in claim 2, wherein the emulsion addition device is attached to the emulsion supply nozzle and has an emulsion diffusion member arranged so as to intersect with an imaginary straight line along the central axis of the emulsion supply nozzle.

4. A mobile paving material manufacturing apparatus as claimed in any one of claims 1 to 3, wherein the water addition device is provided with a water supply nozzle which sprays the water into the mixer, and the attachment position of the water supply nozzle on the water addition device is changeable, and the spray angle of the water relative to the mixer is changeable.

5. A mobile paving material manufacturing apparatus as described in claim 4, wherein the water addition device is attached to the water supply nozzle and has a water diffusion member arranged so as to intersect with an imaginary line extending along the central axis of the water supply nozzle.

6. A method for manufacturing paving material containing recycled roadbed material, solidifying agent, water, and asphalt emulsion, using a mobile manufacturing apparatus for paving material as described in any one of claims 1 to 3, comprising the steps of: supplying the recycled roadbed material to the mixer using the conveyor; supplying the water to the mixer using the water adding device and mixing it with the recycled roadbed material; supplying the solidifying agent to the mixer and mixing it with the water and the recycled roadbed material; and supplying the asphalt emulsion to the mixer using the emulsion adding device and mixing it with the recycled roadbed material, the water, and the solidifying agent.

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