Paving material spraying device and spraying construction method

Abstract

To provide a paving material spraying device which makes pavement construction by a spraying method easier at sites where normal construction is difficult, such as slope surfaces and narrow areas.SOLUTION: A paving material spraying device 10 is composed of a paving material storage section 1 that stores hydraulic paving material M, a pressurized air generating section 2 that generates pressurized air A used for pressurizing the inside of the paving material storage section 1 and pressurizing the paving material M discharged from the paving material storage section 1, a conveying path 3 along which the paving material M discharged from the paving material storage section 1 is mixed with the pressurized air A for pressure feeding and conveyed, and a spraying section 4 that is provided at the end of the conveying path 3 to discharge the paving material M.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a paving material spraying device, a spraying construction method, a sprayed paving structure, and a paving material for spraying, and in particular to a paving material spraying device with excellent workability that can perform paving work even on difficult-to-construct areas such as narrow spaces. [Background technology]

[0002] The applicant has already disclosed an invention for a paving material (Patent Document 1 listed below) that is low-cost, is made from truly natural materials, places little burden on the environment, even when disposed of, is resistant to peeling and scattering, and even if peeling occurs, can be easily repaired without the need to apply new paving material, is non-slip even when the surface becomes wet due to rain, etc., is resistant to rot, and has excellent physical and chemical durability, and is providing products based on this invention.

[0003] The paving material contains bark or crushed bark and a binder, and is configured to form a mixed pavement structure in which the bark fibers are entangled. The paving material can also be configured as a solid consisting of only bark and a binder. There are no restrictions on the species of bark, and either coniferous or broad-leaved bark can be used, and materials other than bark and a binder can also be included. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6600770 "Paving material, bark paving structure, paving material manufacturing method, bark paving method, and paving material mixing device" Summary of the Invention [Problem to be solved by the invention]

[0005] Due to the various advantages mentioned above, this paving material has earned a high reputation for its usefulness. However, there is a problem. This is not only true for this paving material but also for paving construction in general: there are places where construction is difficult. Paving work is carried out by transporting paving machines to the construction site using dump trucks or by hand, but on slopes, for example, it is difficult to transport and lay the machines by hand.

[0006] In such difficult-to-construct locations, the spraying method is considered more suitable than the usual roller compaction method. In normal paving work, the paving material is compacted and hardened by roller compaction, but in the spraying method, the air pressure used to spray the material takes the place of roller compaction. However, with conventional spraying machines, it takes about a day to set up and remove them, so they cannot be used immediately after being delivered and set up at the construction site and then removed immediately after completion.

[0007] Furthermore, application in narrow spaces requires a considerable amount of time and effort. Therefore, there is a need for technology that can further promote the widespread use of the patented paving material mentioned above, which is highly useful and can be applied immediately after being delivered and set up at the construction site, and can be removed immediately after completion, making application on slopes and narrow areas easier.

[0008] Furthermore, when using the above-mentioned patented paving material, the water addition during mixing has traditionally been done by hand, relying on the bark's moisture content and feel, resulting in insufficient quality stability. If the moisture content is too high, the material will stick to the hose used to transport the paving material, causing clogging and making spray application difficult. Furthermore, the paving material will harden in a state where it adheres too strongly to the ground, which is undesirable. On the other hand, if the moisture content is too low, the adhesion will be weak, resulting in a dry finish and reduced durability. Therefore, maintaining an optimal moisture content and a consistent amount of water addition is required.

[0009] Therefore, in light of the state of the prior art, the problem to be solved by the present invention is to provide a paving material spraying device, etc., that can easily perform spray paving work on surfaces that are normally difficult to work on, such as slopes and narrow areas, and that can be used immediately after being delivered and installed at the work site and removed immediately after completion, with excellent workability. Another object of the present invention is to provide a paving material spraying device, etc., that can appropriately add water to the paving material to keep the moisture content constant, with excellent workability. [Means for solving the problem]

[0010] As a result of studying the above-mentioned problems, the inventors of the present application found that the problems can be solved by using a spraying device with a structure and method more suitable for spraying work, such as by devising a way to use pressurized air or by providing a water adding section when carrying out paving work using paving materials using the spraying method, and based on this, they have completed the present invention. That is, the invention claimed in this application, or at least the invention disclosed therein, as a means for solving the above-mentioned problems is as follows.

[0011] [1] A paving material storage section for storing hydraulic paving material; a pressurized air generating unit that generates pressurized air used to pressurize the interior of the paving material storage unit and to pump the paving material discharged from the paving material storage unit; a conveying path section through which the paving material discharged from the paving material storage section is mixed with pressurized air for pressure feeding and conveyed; a spraying section for discharging paving material provided at the end of the conveying path section; A paving material spraying device comprising: [2] A paving material spraying device as described in [1], characterized in that a water adding section is provided on the upstream side of the spraying section to add water to the paving material being transported in the transport path section. [3] The paving material spraying device according to [2], characterized in that the water adding section is provided with a water adding amount adjusting means for adjusting the amount of water added. [4] A paving material spraying device as described in any one of [1], [2], and [3], characterized in that a kneading means is provided within the paving material storage section for kneading the paving material and pushing it out into the conveying path section. [5] The paving material spraying device according to [4], characterized in that the paving material storage section and the transport path section are integrally constructed.

[0012] [6] The paving material spraying device according to [4], characterized in that the paving material storage section and the transport path section are constructed as separate entities. [7] A paving material spraying device according to [4], characterized in that it is configured to be capable of spraying paving material into narrow areas such as around trees such as roadside trees. [8] As paving materials, the following <sr>The paving material spraying device according to [4], characterized in that it uses the specific paving material shown in [5]. <sr>The specific paving material contains bark and a magnesium-containing binder, and the bark has a mixed structure in which the fibers are entangled so as to form a mixed paving structure in which the fibers are entangled, and the binder is magnesium oxide, magnesium oxide extracted with seawater, or a substance containing either of these. Crushed bark is also included as bark. [9] As paving materials, the following <sr>A paving material spraying device according to any one of [5], [6], and [7], characterized in that it uses the specific paving material shown in the following. <sr>The specific paving material contains bark and a magnesium-containing binder, and the bark has a mixed structure in which the fibers are entangled so as to form a mixed paving structure in which the fibers are entangled, and the binder is magnesium oxide, magnesium oxide extracted with seawater, or a substance containing either of these. Crushed bark is also included as bark.

[10] A method for spraying paving material onto a paving target using the paving material spraying device described in [1], a paving material preparation step of preparing paving material in the paving material storage section; a storage section pressurizing step of pressurizing the inside of the paving material storage section with pressurized air from the pressurized air generating section; a paving material pumping process for mixing the compressed air with the paving material discharged from the paving material storage section and pumping the mixed paving material through the conveying path section; a paving material discharging step of discharging the paving material that has been pressure-fed to the spraying section from the spraying section; A spraying construction method comprising:

[0013]

[11] A method for spraying paving material onto a paving target using the paving material spraying device described in [2], a paving material preparation step of preparing paving material in the paving material storage section; a storage section pressurizing step of pressurizing the inside of the paving material storage section with pressurized air from the pressurized air generating section; a paving material pumping process for mixing the compressed air with the paving material discharged from the paving material storage section and pumping the mixed paving material through the conveying path section; a hydration process in which water is added to the paving material being transported through the transport path section by the hydration section; a paving material discharge step of discharging the hydrated paving material that has been pressure-fed to the spraying section from the spraying section; A spraying construction method comprising:

[12] The spray application method according to

[11] , characterized in that it includes a water addition amount adjusting process for adjusting the amount of water added to the paving material by a water addition amount adjusting means provided in the water adding section.

[13] As paving materials, <sr>The spray application method according to any one of

[10] ,

[11] , and

[12] , characterized in that the specific paving material shown in is used. <sr>The specific paving material contains bark and a magnesium-containing binder, and the bark has a mixed structure in which the fibers are entangled so as to form a mixed paving structure in which the fibers are entangled, and the binder is magnesium oxide, magnesium oxide extracted with seawater, or a substance containing either of these. Crushed bark is also included as bark.

[14] The spray application method according to

[13] , characterized in that the specific paving material is made from a material processed by a Shokusenki machine.

[0014]

[15] A spray application method according to any one of

[10] ,

[11] , and

[12] , characterized in that wood resources processed by Shokusenki are used as raw materials for paving materials.

[16] A sprayed pavement structure, characterized in that it is formed by the sprayed construction method described in any one of

[10] ,

[11] ,

[12] , and

[14] .

[17] A sprayed pavement structure formed by the sprayed construction method described in

[13] .

[18] A sprayed pavement structure formed by the sprayed construction method described in

[15] .

[19] The following is used in the paving material spraying device described in any one of [1], [2], and [3], or in the spraying construction method described in any one of

[10] ,

[11] , and

[12] : <sr>1. A spray-applied paving material, characterized in that the raw material bark is treated with a Shokusenki. <sr>The specific paving material contains bark and a magnesium-containing binder, and the bark has a mixed structure in which the fibers are entangled so as to form a mixed paving structure in which the fibers are entangled, and the binder is magnesium oxide, magnesium oxide extracted with seawater, or a substance containing either of these. Crushed bark is also included as bark.

[20] A Shokusenki-treated paving material used in the construction of a paving structure, characterized in that it is made from Shokusenki-treated wood resources. [Effects of the Invention]

[0015] The paving material spraying device, spraying method, sprayed paving structure, and sprayed paving material of the present invention are configured as described above, allowing for easy spraying paving work even on surfaces that are normally difficult to work on, such as slopes and narrow areas. Compared to conventional spraying machines, they can be made smaller, enabling work in locations that would have been impossible or difficult to transport and install with conventional methods. Furthermore, they can be installed at the construction site and immediately removed after installation. Furthermore, water can be appropriately added to the paving material to maintain a constant moisture content, thereby providing a high-quality paving structure. Thus, the present invention provides a paving material spraying device and other devices with excellent workability, thereby increasing the utilization of the patented paving material, which is highly useful, and further promoting its widespread use.

[0016] Furthermore, the sprayed paving material of the present invention is well fiberized by the Shokusenki process, which allows the fibers to be entangled in a well-mixed state. As a result, the sprayed paving structure of the present invention obtained by construction is provided as a paving structure in a well-mixed state in which the fibers are tightly entangled. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is an explanatory diagram conceptually showing the basic configuration of a paving material spraying device according to the present invention. [Figure 1-2] FIG. 2 is an explanatory diagram conceptually showing the operation of the paving material spraying device of the present invention shown in FIG. [Figure 2] 1 is an explanatory diagram conceptually showing the basic configuration of a paving material spraying device of the present invention having a water adding section. [Figure 2-2] FIG. 3 is an explanatory diagram conceptually showing the operation of the paving material spraying device of the present invention shown in FIG. 2. [Figure 3] 1 is an explanatory diagram conceptually showing the configuration of a paving material spraying device of the present invention having a water addition amount adjustment means. [Figure 4] 1 is an explanatory diagram conceptually showing the configuration of a paving material spraying device of the present invention having a kneading means. [Figure 5] 1A and 1B are explanatory diagrams conceptually showing examples of the configuration of the paving material spraying device of the present invention, focusing mainly on the relationship between the paving material storage section and the transport path section. [Figure 6] FIG. 1 is a flow chart showing the basic configuration of the spraying construction method of the present invention. [Figure 7] FIG. 10 is a flow chart showing another configuration of the spraying method of the present invention using a paving material spraying device having a water adding section. [Figure 7-2] FIG. 10 is a flow chart showing another configuration of the spraying method of the present invention using a paving material spraying device having a water adding section and a water adding amount adjusting means. [Figure 8] FIG. 1 is a photograph showing an example of a specific paving material for spray application according to the present invention, which is manufactured using bark processed by a Shokusenki machine as a raw material. [Figure 9] 9 is a photograph showing an example of a spray-applied pavement structure of the present invention, and is a photograph of a pavement structure applied by the spray-applied method of the present invention using the specific pavement material for spray application shown in FIG. 8. DETAILED DESCRIPTION OF THE INVENTION

[0018] The present invention will be described in detail below with reference to the drawings. FIG. 1 is an explanatory diagram conceptually illustrating the basic configuration of the paving material spraying apparatus of the present invention. Also, FIGS. 1-2 are explanatory diagrams conceptually illustrating the operation of the paving material spraying apparatus of the present invention shown in FIG. 1. As shown in these figures, the paving material spraying apparatus 10 is primarily composed of a paving material storage section 1 for storing hydraulic paving material M, a pressurized air generating section 2 for generating pressurized air A used to pressurize the paving material storage section 1 and to pump the paving material M discharged from the paving material storage section 1, a conveying path section 3 along which the paving material M discharged from the paving material storage section 1 is mixed with the pressurized air A for pumping and transported, and a spraying section 4 provided at the end of the conveying path section 3 for discharging the paving material M. The storage section 1 may also be a space in which paving material M is produced (prepared) by mixing predetermined raw materials. In other words, it may be used for both paving material production and storage.

[0019] In the paving material spraying device 10 of the present invention configured as described above, hydraulic paving material M is stored (or produced and stored) in the paving material storage section 1, while the pressurized air generating section 2 produces pressurized air A used to pressurize the interior of the paving material storage section 1 and to pump Tp the paving material M discharged from the paving material storage section 1. The produced pressurized air A is sent to the paving material storage section 1 to pressurize its interior, and is also sent to the conveying path section 3 to pump the paving material M discharged from the paving material storage section 1 for spraying.

[0020] The inside of the paving material storage section 1 is pressurized by the pressurized air A, which applies pressure to the stored paving material M, but this pressure is directed toward the most downstream side of the paving material storage section 1, i.e., toward the outlet of the conveying path section 3 which communicates with the spraying section 4. In other words, the paving material M is pushed by the pressurized air A toward the inlet of the conveying path section 3 and is discharged into the conveying path section 3.

[0021] On the other hand, the pressurized air A is also sent directly to the conveying path section 3 and blown into it, and also acts to pressure-feed (Tp) the paving material M discharged into the conveying path section 3 toward the downstream spraying section 4. In other words, the paving material M discharged into the conveying path section 3 is mixed with the pressurized air A for pressure feeding and is transported toward the spraying section 4. The paving material M is conveyed through the conveying path section 3 and reaches the spraying section 4 at the end thereof, where it is discharged from the spraying section 4 (discharge Dg), and the paving material M is sprayed.

[0022] In this way, the pressurized air A performs two functions: pushing out the paving material M in the paving material storage section 1 and pressurizing the paving material M discharged into the conveying path section 3, making it possible to effectively and easily construct paving structures using the spraying method.

[0023] Figure 2 is an explanatory diagram conceptually showing the basic configuration of the paving material spraying apparatus of the present invention having a hydration section. Also, Figure 2-2 is an explanatory diagram conceptually showing the operation of the paving material spraying apparatus of the present invention shown in Figure 2. As shown in the figure, in addition to the configuration described in Figure 1 etc., the present paving material spraying apparatus 210 is characterized in that it is provided with a hydration section 25 upstream of the spraying section 24, which adds water W to the paving material M being transported in the transport path section 23.

[0024] With this configuration, according to this paving material spraying device 210, water W is added from the water addition section 25 to the paving material M being transported through the conveying path section 23, and the paving material M with water W added, i.e., the hydrated paving material M, is discharged (discharge Dg) from the spraying section 24 located downstream of the point where the water W is added, and the paving material M is sprayed.

[0025] The paving material M already contains a certain amount of moisture when it is stored in the paving material storage section 21, and this is also the case with the basic configuration specifications of the device of the present invention shown in Figure 1 above. However, it is desirable that the paving material M at this stage have as little moisture as possible. If the moisture content is too high, it is likely to stick and clog within the conveying path section 23, which is undesirable. Spraying construction requires approximately 1.2 to 1.5 times the moisture content of normal construction (roller compaction method). Test results have shown that a moisture content of approximately 72% is desirable during spraying construction.

[0026] Paving material M with as little moisture as possible is supplied to the conveying path 23, where it is pumped with pressurized air A without sticking or clogging. A predetermined amount of water W is added from the water-adding section 25 to produce hydrated paving material M at the desired moisture content at the discharge stage Dg, which is then discharged from the spraying section 24 (discharge Dg). Therefore, the connection point from the water-adding section 25 to the conveying path 23 should be as close as possible to or immediately before the spraying section 24, and more preferably, connected to the spraying section 24 itself. Particularly when the construction length is long, i.e., when the conveying path 23 is extended using a hose or the like, the paving material M is manufactured (prepared) with a moisture content for normal construction, and the spraying section 24 is used as the connection point from the water-adding section 25, where water is added, enabling spraying construction with an appropriate moisture content.

[0027] In the figures used in the above explanation, the paving material in the paving material storage section 1 or the transport path section 3 contains a certain amount of moisture, and the amount of water contained in the discharge Dg from the spray section 24 varies depending on the amount of water added from the water adding section 25. Regardless of these factors, however, the paving material will be referred to as "paving material M." This also applies to the following figures.

[0028] Figure 3 is an explanatory diagram conceptually showing the configuration of a paving material spraying device of the present invention equipped with a water addition amount adjustment means. Note that in the explanation using Figure 3 and the following figures, the elements and their reference numerals shown in Figures 1-2 and 2-2 above may be used. As shown in the figure, in addition to the configuration explained in Figure 2 etc., the configuration of this paving material spraying device 310 is characterized in that the water addition section 35 is equipped with a water addition amount adjustment means 36 that adjusts the amount of water added.

[0029] In the paving material spraying device 310 configured as described above, the amount of water supplied by the water adding unit 35 into the transport path 33, i.e., the amount of water added, is adjusted by the water addition amount adjusting means 36. The water addition amount adjusting means 36 determines the amount of water added necessary to ensure that the paving material M discharged from the spraying unit 34 contains an appropriate amount of water, and water W is added from the water adding unit 35 based on this amount of water. In other words, the water addition amount adjusting means 36 appropriately adds water W to the paving material M, thereby stabilizing the quality of the pavement structure obtained by spraying. In particular, when the transport path 33 is extended, the paving material M is manufactured (prepared) at a moisture content for normal construction, and the spraying unit 34 is used as the connection point from the water adding unit 25. Water W with an adjusted amount of water added there is added, enabling spraying with an appropriate moisture content.

[0030] Figure 4 is an explanatory diagram conceptually showing the configuration of a paving material spraying apparatus of the present invention having a kneading means. As shown in the figure, in addition to any of the configurations described above, this paving material spraying apparatus 410 is characterized by the provision of kneading means 47 in the paving material storage section 41 for kneading the paving material M and extruding it into the conveying path section 43. Note that Figure 4 shows an example of a configuration pattern that includes a water addition section 45 and a water addition amount adjustment means 46, as in Figure 3 above.

[0031] In the paving material spraying device 410 having such a configuration, the paving material M stored in the paving material storage section 41 is kneaded by the kneading means 47 to homogenize the composition to a certain extent, and is then forced into the discharge outlet to the conveying path section 43 and pushed out into the conveying path section 43. The paving material M is smoothly discharged into the conveying path section 43 due to the cooperation of the pressurizing action inside the paving material storage section 41 by the above-mentioned pressurized air A and the pushing action by the kneading means 47.

[0032] The specific specifications of the paving material storage section 1, etc. are not critical as long as it can store therein the paving material M to be used in forming a paving structure by spray application. A conventionally known air compressor, etc., can be used as appropriate for the pressurized air generating section 2, etc. A conventionally known hose, etc., can also be used as appropriate for the conveying path section 3, etc. A conventionally known injector, etc., can also be used as appropriate for the spraying section 4, etc. However, in the case of a configuration including a water adding section 25, etc., it is desirable that the structure be such that a means for distributing added water from the water adding section 25, etc., such as a hose, can be connected.

[0033] The specific structures of the water adding section 25 etc. and the water adding amount adjusting means 36 etc. are not particularly limited and can be designed as appropriate, so long as these elements can fully perform their functions.

[0034] The kneading means 47 provided in the paving material storage section 1 etc. may also be designed as appropriate, as long as it can knead the paving material M to a certain degree of homogenization and then extrude it into the conveying path section 43 etc. A rotating shaft structure with multiple fins, i.e., a mixing function like a screw mixer, is optimal.

[0035] FIG. 5 is an explanatory diagram conceptually showing examples (a) and (b) of the configuration of a paving material spraying device of the present invention, focusing on the relationship between the paving material storage section and the transport path section. As shown as paving material spraying device 510a in FIG. 5(a), the device of the present invention can be configured with the paving material storage section 51a and the transport path section 53a integrated into one unit. This configuration is convenient for handling, such as transporting and storing the device 510a. On the other hand, as shown as paving material spraying device 510b in FIG. 5(b), the device of the present invention can also be configured with the paving material storage section 51b and the transport path section 53b separately.

[0036] The paving material spraying device 10 and the like described above are devices for constructing pavement structures on roads, slopes, and other surfaces using a spraying method using pressurized air, rather than the usual roller compaction method. The target of construction is not limited, and it can also be used to spray paving material in narrow areas such as around roadside trees.

[0037] The paving material spraying device 10 of the present invention can be specifically designed for paving work using the patented paving material described in the above-mentioned Patent Document 1. This paving material having the following characteristics will be referred to hereinafter as the "specific paving material." Feature 1: Contains bark and magnesium-containing binders. Feature 2: Bark also includes crushed bark. Feature 3: Bark has a mixed structure in which the fibers are entangled with each other. Feature 4: Feature 3 makes it possible to form a mixed pavement structure in which the fibers are intertwined. Feature 5: The binder is magnesium oxide, seawater-extracted magnesium oxide, or a substance containing either of these.

[0038] Of course, the paving materials that can be used with the paving material spraying device 10 of the present invention are not limited to special paving materials. However, special paving materials derived from bark, which have various advantages and are highly practical and in demand, can be processed with the device 10 of the present invention, which also has various advantages, to construct excellent paving structures, which is expected to lead to the widespread use of special paving materials and an increase in demand for paving construction work.

[0039] Figure 6 is a flow diagram showing the basic configuration of the spraying method of the present invention. The equipment used in this method may be any of the paving material spraying devices 10 already described, but the following description will be based on the device 10 shown in Figure 1, which is representative of these. As shown in the figure, this spraying method uses the paving material spraying device 10 to spray paving material M onto a paving target. It mainly comprises a paving material preparation process P10 in which paving material M is prepared in a paving material storage section 1, a storage section pressurization process P20 in which pressurized air A is used by a pressurized air generator 2 to pressurize the interior of the paving material storage section 1, a paving material pressure-feeding process P30 in which the pressurized air A is mixed with the paving material M discharged from the paving material storage section 1 and pressure-feed the mixture through the conveying path section 3, and a paving material discharge process P60 in which the paving material M pressure-feed to the spraying section 4 is discharged from there.

[0040] With this configuration, in this construction method, in the paving material preparation process P10, paving material M is prepared in the paving material storage section 1 of the paving material spraying device 10, and in the storage section pressurization process P20, the paving material storage section 1 is pressurized with pressurized air A from the pressurized air generation section 2, while in the paving material pressure transfer process P30, pressurized air A is mixed with the paving material M discharged from the paving material storage section 1 and this is pressure transferred within the conveying path section 3, and in the paving material discharge process P60, the paving material M pressure transferred to the spraying section 4 is discharged from there, and in this way the paving material M is sprayed onto the paving target, forming a spray-applied pavement structure 50.

[0041] 7 is a flow diagram showing another configuration of the spraying method of the present invention using a paving material spraying device with a water adding section. The devices used in this method are the paving material spraying device 210 of a predetermined configuration already explained, but the following description will be based on the same device 210 shown in FIG. 2 as a representative example. As shown in the figure, this spraying method is a method of spraying paving material M onto a paving target using a paving material spraying device 210, and is composed of a paving material preparation process Q10 in which paving material M is prepared in a paving material storage section 21, a storage section pressurization process Q20 in which the inside of the paving material storage section 21 is pressurized with pressurized air A from a pressurized air generating section 22, a paving material pressure transfer process Q30 in which the pressurized air A is mixed with the paving material M discharged from the paving material storage section 21 and pressure-transferred within the conveying path section 23, a hydration process Q50 in which water W is added by a hydration section 25 to the paving material M transported within the conveying path section 23, and a paving material discharge process Q60 in which the hydrated paving material M pressure-transferred to the spraying section 24 is discharged from there.

[0042] With this configuration, in this construction method, in paving material preparation process Q10, paving material M is prepared in paving material storage section 21 of paving material spraying equipment 210. In storage section pressurization process Q20, paving material storage section 21 is pressurized with pressurized air A from pressurized air generator 2. Meanwhile, in paving material pumping process Q30, pressurized air A is mixed with paving material M discharged from paving material storage section 21 and this is pumped through conveying path section 23. In hydration process Q50, water W is added by hydration section 5 to paving material M transported through conveying path section 23. Finally, in paving material discharge process Q60, the hydrated paving material M pumped to spraying section 24 is discharged from there. In this way, paving material M is sprayed onto the paving target, forming a sprayed pavement structure 250.

[0043] Figure 7-2 is a flow diagram showing another configuration of the spraying method of the present invention using a paving material spraying device having a water addition section and a water addition amount adjustment means. The device used in this method is the paving material spraying device 310 described with reference to Figure 3. Therefore, the description will be based on and refer to the device 310 shown in Figure 3. As shown in the figure, this spraying method is characterized in that it includes a water addition amount adjustment process Q40 in which the amount of water added to the paving material M is adjusted by the water addition amount adjustment means 36 provided in the water addition section 35 in accordance with the water addition process Q50 in the flow shown in Figure 7.

[0044] With this configuration, in this construction method, in paving material preparation step Q10, paving material M is prepared in paving material storage section 31 of paving material spraying equipment 310, and in storage section pressurization step Q20, the inside of paving material storage section 31 is pressurized with pressurized air A from pressurized air generator 32, while in paving material pressure-feeding step Q30, pressurized air A is mixed with paving material M discharged from paving material storage section 31 and this is pressure-feeded through conveying path section 33. Up to this point, the flow is the same as that shown in Figure 7, but what follows is different.

[0045] As shown in Figure 7-2, in this spraying method, water W is added by the water adding section 35 to the paving material M being transported along the conveying path section 33, with the amount of water added being adjusted by the water addition amount adjustment process Q40, which is provided in conjunction with the water addition process Q50. Then, in the paving material discharge process Q60, the hydrated paving material M that has been pumped to the spraying section 34 is discharged from there. In this way, the paving material M is sprayed onto the paving target, forming a sprayed paving structure 350. However, spraying paving material M with an adjusted amount of water can result in a paving structure 350 with better properties.

[0046] In the spray application method of the present invention described with reference to Figures 7 and 7-2, the above-mentioned specific paving material can be used as the paving material M. The specific paving material, in particular, can be optimally sprayed by using Shokusenki-processed bark as the raw material. Here, Shokusenki processing refers to the pulverization of wood and other materials using a Shokusenki, a machine that finely grinds and pulverizes wood and other materials into fibers. Even if the quality is not as good as the specific paving material, better spray application can be achieved by using paving materials manufactured from Shokusenki-processed wood resources as raw materials, and such spray application methods are also within the scope of the present invention.

[0047] One method for producing specific paving materials from bark is to use a machine called a ring barker, which strips the bark from logs of trees such as cedar. However, this method has the problem that the resulting bark contains many wood chips, which end up on the surface of the pavement structure after construction. Furthermore, the bark that is stripped off can only be used as fuel or disposed of, and cannot be used as a paving material.

[0048] Another method is to collect naturally fallen bark without using a ring barker, let it sit for about a year to soften it, and then crush it for use. The reason for leaving it to age is that new bark is hard and leaves an undesirable fuzzy surface for the pavement structure. However, this method requires a long time before it can be used as a paving material, and is not efficient in production.

[0049] On the other hand, the Shokusenki method differs from other types of equipment in that it can finely grind and crush wood and other materials into fibers, even if they contain wood chips, and can process stripped bark, allowing all raw wood resources to be used as material. Furthermore, while new bark previously had to be left for several years for the oils to drain, the Shokusenki process allows it to be used immediately. It goes without saying that bark that has been left to mature for around a year can also be processed. Any type of bark can be used as a paving material through the Shokusenki process.

[0050] Figure 8 is a photograph showing an example of a spray-applied paving material of the present invention, manufactured using Shokusenki-processed bark. As shown in the figure, this spray-applied paving material, a specific paving material made from Shokusenki-processed bark, has been well fiberized by the process, and the fibers are densely intertwined to the point that it feels fluffy to the touch. This paving material is sufficient to form a paving structure with intertwined fibers.

[0051] Figure 9 is a photograph showing an example of a spray-applied pavement structure of the present invention, constructed using the spray-applied pavement material shown in Figure 8 and the spray-applied construction method of the present invention. As shown in the figure, a well-mixed pavement structure has been formed in which the fibers are densely intertwined. The result is an excellent product.

[0052] Note that Shokusenki-processed paving materials made from Shokusenki-processed wood resources are not limited to specific paving materials having the above-mentioned features 1 to 5, and are within the scope of the present invention. Furthermore, the method of using this Shokusenki-processed paving material is not limited to spray application; it may also be used by conventional rolling application methods.

[0053] <About the moisture content when spraying specific paving materials> Test results showed that the density of bark, the main raw material of the specific paving material, is 571-587 kg / m 2 The moisture content was 63-69%. Furthermore, when a good pavement structure was obtained by spray application using the prepared specific paving material, the moisture content of the specific paving material at the time of application was approximately 72%. Therefore, by setting this as the target moisture content and measuring the density and moisture content of the raw material bark, it is possible to calculate the amount of water required to add to the specific paving material during spray application. [Industrial Applicability]

[0054] The paving material spraying device and spraying method of the present invention allow for easy spray paving, even on surfaces that are normally difficult to work on, such as slopes and narrow areas. This further promotes the use of specific paving materials. Furthermore, the spray paving material of the present invention is well fiberized by the Shokusenki process, allowing for the formation of a well-mixed state in which the fibers are intertwined. This allows for the provision of an excellent paving structure in which the fibers are tightly intertwined. Therefore, this invention has high industrial applicability in the paving construction field and all related fields. [Explanation of symbols]

[0055] 1, 21, 31, 41, 51a, 51b...Paving material storage section 2, 22, 32, 42, 52a, 52b...Compressed air generating section 3, 23, 33, 43, 53a, 53b...Transport path section 4, 24, 34, 44, 54a, 54b...Spraying section 10, 210, 310, 410, 510a, 510b...Paving material spraying equipment 25, 35, 45, ... water added 36, 46,...water amount adjustment means 47...Kneading method 50, 250, 350...Sprayed pavement structure A: Compressed air Dg...Paving material discharge M…Paving material P10, Q10...Paving material preparation process P20, Q20...Pressure process inside the reservoir P30, Q30...Paving material pumping process P60, Q60...Paving material discharge process Q40…Water addition adjustment process Q50…Hydration process Tp...pumping of paving materials W…Water< / sr> < / sr> < / sr> < / sr> < / sr> < / sr> < / sr> < / sr>

Claims

1. a paving material storage section for storing hydraulic paving material; a pressurized air generating unit that generates pressurized air used to pressurize the interior of the paving material storage unit and to pump the paving material discharged from the paving material storage unit; a conveying path section through which the paving material discharged from the paving material storage section is mixed with pressurized air for pressure feeding and conveyed; a spraying section for discharging paving material provided at the end of the conveying path section; A paving material spraying device comprising:

2. 2. A paving material spraying device according to claim 1, further comprising a water adding section provided upstream of said spraying section for adding water to the paving material being transported through said transport path section.

3. 3. The paving material spraying device according to claim 2, wherein the water adding section is provided with a water adding amount adjusting means for adjusting the amount of water added.

4. 4. A paving material spraying device according to claim 1, wherein a kneading means is provided in said paving material storage section for kneading the paving material and forcing it out onto said transport path section.

5. 5. The paving material spraying device according to claim 4, wherein the paving material storage section and the transport path section are integrally constructed.

6. 5. The paving material spraying device according to claim 4, wherein the paving material storage section and the transport path section are constructed as separate bodies.

7. 5. A paving material spraying device according to claim 4, which is configured to be capable of spraying paving material into narrow spaces such as around roadside trees.

8. 5. The paving material spraying device according to claim 4, wherein the specific paving material shown in <SR> below is used as the paving material. <SR> The specific paving material contains bark and a magnesium-containing binder, and the bark has a mixed structure in which the fibers are entangled so as to form a mixed paving structure in which the fibers are entangled, and the binder is magnesium oxide, magnesium oxide extracted with seawater, or a substance containing either of these. Crushed bark is also included as bark.

9. 8. A paving material spraying device according to claim 5, 6 or 7, characterized in that the specific paving material shown in <SR> below is used as the paving material. <SR> The specific paving material contains bark and a magnesium-containing binder, and the bark has a mixed structure in which the fibers are entangled so as to form a mixed paving structure in which the fibers are entangled, and the binder is magnesium oxide, magnesium oxide extracted with seawater, or a substance containing either of these. Crushed bark is also included as bark.

10. A method for spraying paving material onto a paving target using the paving material spraying device according to claim 1, comprising: a paving material preparation step of preparing paving material in the paving material storage section; a storage section pressurizing step of pressurizing the inside of the paving material storage section with pressurized air from the pressurized air generating section; a paving material pumping process for mixing the compressed air with the paving material discharged from the paving material storage section and pumping the mixed paving material through the conveying path section; a paving material discharging step of discharging the paving material that has been pressure-fed to the spraying section from the spraying section; A spraying construction method comprising:

11. A method for spraying paving material onto a paving target using the paving material spraying device according to claim 2, comprising: a paving material preparation step of preparing paving material in the paving material storage section; a storage section pressurizing step of pressurizing the inside of the paving material storage section with pressurized air from the pressurized air generating section; a paving material pumping process for mixing the compressed air with the paving material discharged from the paving material storage section and pumping the mixed paving material through the conveying path section; a hydration process in which water is added to the paving material being transported through the transport path section by the hydration section; a paving material discharge step of discharging the hydrated paving material that has been pressure-fed to the spraying section from the spraying section; A spraying construction method comprising:

12. 12. The spraying application method according to claim 11, further comprising a water addition amount adjusting step for adjusting the amount of water added to the paving material by means of a water addition amount adjusting means provided in the water adding section.

13. 13. The spray application method according to claim 10, 11 or 12, wherein the specific paving material shown in <SR> below is used as the paving material. <SR> The specific paving material contains bark and a magnesium-containing binder, and the bark has a mixed structure in which the fibers are entangled so as to form a mixed paving structure in which the fibers are entangled, and the binder is magnesium oxide, magnesium oxide extracted with seawater, or a substance containing either of these. Crushed bark is also included as bark.

14. 14. The spray application method according to claim 13, wherein the specific paving material is a material processed by a Shokusenki machine.

15. 13. The spray application method according to claim 10, 11 or 12, wherein wood resources processed by Shokusenki are used as raw materials for the paving material.

16. A sprayed pavement structure formed by the spray application method according to any one of claims 10, 11, 12 and 14.

17. A sprayed pavement structure formed by the spray application method according to claim 13.

18. A sprayed pavement structure formed by the spray application method according to claim 15.

19. A paving material for spray application, characterized in that it is a specific paving material shown in the following <SR>, which is used in the paving material spraying device described in any one of claims 1, 2, or 3, or in the spray application method described in any one of claims 10, 11, or 12, and whose raw material bark has been treated with an osmotic fiber machine. <SR> The specific paving material contains bark and a magnesium-containing binder, and the bark has a mixed structure in which the fibers are entangled so as to form a mixed paving structure in which the fibers are entangled, and the binder is magnesium oxide, magnesium oxide extracted with seawater, or a substance containing either of these. Crushed bark is also included as bark.

20. A Shokusenki-treated paving material used in the construction of paving structures, characterized in that it is made from wood resources that have been treated with Shokusenki.

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