Asphalt pavement structure and reinforcement material

Abstract

To provide an asphalt pavement structure for which reuse of waste pavement materials is easy even if synthetic resin mesh reinforcing materials are buried therein.SOLUTION: A reinforcing material 8 embedded in the asphalt pavement structure has inclined re-bars 8a that are inclined with respect to the longitudinal direction L and width direction W of the reinforcing material 8. If the pitch of the longitudinal direction L of the intersections 8b where the inclined re-bars 8a intersect is defined as P1 and the interval between road milling machine cutting bits is defined as A, the dimension of the longitudinal direction L of the intersections 8b is defined as B, and the dimension of the longitudinal direction L of the intersections 8b adjacent to each other in the inclination direction T1 or T2 of the inclined re-bars 8a is defined as C, then the reinforcing material 8 satisfies (1) P1>2A+2B and (2) C>A>B. If the pitch of the width direction W of the intersections 8b is defined as P2, the dimension of the width direction W of the intersections 8b is defined as D, and the dimension of the width direction W of the intersections 8b adjacent to each other in the inclination direction T1 or T2 is defined as E, then the reinforcing material 8 satisfies (3) P2>2A+2D and (4) E>A>D.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to an asphalt pavement structure and a reinforcing material for reinforcing an asphalt pavement structure. [Background technology]

[0002] Road surface repair work is carried out as needed for asphalt pavement structures such as roads. This is because rutting, cracks, and other defects occur in asphalt pavement structures due to aging. In road surface repair work, the upper layer of the asphalt pavement structure is cut and removed using a road cutting machine such as a road cutter, and then repaved. Naturally, road surface repair work takes a long time and is very expensive.

[0003] In order to reduce the frequency of such road surface repair works, a synthetic resin mesh reinforcement 30 as shown in Fig. 10(a) is sometimes embedded in an asphalt pavement structure (see, for example, Patent Document 1). When mesh reinforcement is embedded in an asphalt pavement structure, the roadbed material is restrained by the openings of the mesh reinforcement, reducing the movement of the roadbed material caused by traffic load. This extends the life of the asphalt pavement structure, reducing the frequency of road surface repair works. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2023-16121 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, if reinforcing materials are buried, the pavement waste will contain long pieces of waste resin. Road milling machines used in road surface repair work are equipped with a cylindrical cutting drum that extends in the width direction of the road milling machine, and a large number of cutting bits are attached to the outer circumferential surface of the cutting drum at a predetermined interval A in the width direction. Therefore, when an asphalt pavement structure with buried reinforcing materials is cut by the cutting bits of the road milling machine, the cut pavement waste will contain long pieces of waste resin cut to a width equivalent to the interval A of the cutting bits (see Figure 10(b)).

[0006] Pavement waste containing long resin waste is often disposed of as industrial waste without being reused. Long resin waste is difficult to crush with a crusher for crushing pavement waste. Therefore, when sieving the crushed pavement waste by grain size, the long resin waste gets caught in the sieve, causing clogging of the sieve. When clogging of the sieve occurs, it becomes necessary to remove the long resin waste from the sieve each time, which significantly reduces the efficiency of sieving. Therefore, the reuse of pavement waste containing long resin waste has not progressed very much.

[0007] An object of the present invention is to provide an asphalt pavement structure and reinforcing material that allows easy reuse of waste pavement material even when a synthetic resin mesh reinforcing material is embedded. [Means for solving the problem]

[0008] According to the present invention, there is provided the following asphalt pavement structure that solves the above problems. "An asphalt pavement structure in which synthetic resin mesh reinforcement is embedded, The reinforcing material has a plurality of inclined bars inclined with respect to both a longitudinal direction and a width direction of the reinforcing material, The longitudinal pitch of the intersection portion where the inclined reinforcements intersect is P1, The spacing between the cutting bits of the road milling machine is A. The dimension of the intersection in the longitudinal direction is B, When the longitudinal dimension between adjacent intersections in the diagonal direction of the diagonal reinforcement is C, (1) P1>2A+2B (2) C>A>B While satisfying the above, The pitch of the intersections in the width direction is P2, The dimension of the intersection in the width direction is D, When the dimension in the width direction between the adjacent intersection portions in the inclination direction is E, (3) P2>2A+2D (4) E>A>D The present invention provides an asphalt pavement structure that satisfies the above requirements.

[0009] Preferably, the shape of the openings in the reinforcing material is square or hexagonal. The reinforcing material may be made of a material that melts at the processing temperature of the recycled asphalt.

[0010] The reinforcing material is preferably covered with a sheet that absorbs and retains the asphalt emulsion. The sheet is preferably made of nonwoven fabric. The nonwoven fabric is preferably made of short fibers.

[0011] The asphalt pavement structure of the present invention comprises a crushed stone layer constructed above the roadbed and an asphalt layer constructed above the crushed stone layer, and the reinforcing material may be embedded between the crushed stone layer and the asphalt layer. The asphalt pavement structure of the present invention may also comprise a crushed stone layer constructed above the roadbed and an asphalt layer constructed above the crushed stone layer, and the reinforcing material may be embedded inside the asphalt layer.

[0012] According to the present invention, there is also provided the following reinforcing material that solves the above problems. "A synthetic resin mesh reinforcement material to be embedded in asphalt pavement structures, The reinforcing material has a plurality of inclined reinforcements inclined with respect to the longitudinal direction and the width direction of the reinforcing material, The longitudinal pitch of the intersection portion where the inclined reinforcements intersect is P1, The spacing between the cutting bits of the road milling machine is A. The dimension of the intersection in the longitudinal direction is B, When the longitudinal dimension between adjacent intersections in the diagonal direction of the diagonal reinforcement is C, (1) P1>2A+2B (2) C>A>B While satisfying the above, The pitch of the intersections in the width direction is P2, The dimension of the intersection in the width direction is D, When the dimension in the width direction between the adjacent intersection portions in the inclination direction is E, (3) P2>2A+2D (4) E>A>D A "reinforcement material that satisfies the above requirements" is provided.

[0013] The shape of the openings of the reinforcing material according to the present invention is preferably rectangular or hexagonal. The reinforcing material according to the present invention is preferably made of a material that melts at the processing temperature of the recycled asphalt.

[0014] The reinforcing material of the present invention is advantageously bonded to a sheet that absorbs and retains the asphalt emulsion. The sheet may be made of a nonwoven fabric. The nonwoven fabric is preferably made of short fibers.

[0015] The reinforcing material of the present invention is preferably embedded between the crushed stone layer and the asphalt layer, but may also be embedded inside the asphalt layer. Effect of the Invention

[0016] When the asphalt pavement structure of the present invention is cut by a road surface cutting machine, the reinforcing material is cut into small pieces that can pass through a sieve of a specified size, so that no long pieces of waste resin are generated and the waste pavement material can be easily reused.

[0017] When the reinforcing material of the present invention is cut by a road milling machine, it is cut into pieces small enough to pass through a sieve of a specified size, making it easy to reuse the waste pavement material. [Brief description of the drawings]

[0018] [Figure 1] 1 is a cross-sectional view showing a first embodiment of an asphalt pavement structure according to the present invention. [Diagram 2] FIG. 3 is a cross-sectional view showing a second embodiment of an asphalt pavement structure according to the present invention. [Diagram 3] FIG. 4 is a cross-sectional view showing a third embodiment of an asphalt pavement structure according to the present invention. [Figure 4] FIG. 4 is a cross-sectional view showing a fourth embodiment of an asphalt pavement structure according to the present invention. [Diagram 5] FIG. 2 is a perspective view of the reinforcement member shown in FIG. 1 . [Figure 6] FIG. 2(a) is a plan view of the reinforcing material shown in FIG. 1, and FIG. 2(b) is a schematic diagram showing the state in which the reinforcing material shown in (a) has been cut along the width direction. [Figure 7] FIG. 2(a) is a plan view of the reinforcing material shown in FIG. 1, and FIG. 2(b) is a schematic diagram showing the state in which the reinforcing material shown in (a) has been cut along the longitudinal direction. [Figure 8] (a) is a plan view of a reinforcing material having hexagonal openings, and (b) is a schematic diagram showing the state in which the reinforcing material shown in (a) has been cut along the width direction. [Figure 9] (a) A plan view of a reinforcing material having hexagonal openings, and (b) a schematic diagram showing the state in which the reinforcing material shown in (a) has been cut along the longitudinal direction. [Figure 10] FIG. 1A is a plan view showing a conventional reinforcing material, and FIG. 1B is a schematic diagram showing the state in which the reinforcing material shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, preferred embodiments of the asphalt pavement structure and reinforcing material of the present invention will be described with reference to the drawings.

[0020] (Asphalt pavement structure 2) Referring to FIG. 1, an asphalt pavement structure 2 comprises a crushed stone layer 4, an asphalt layer 6, and a reinforcing material 8.

[0021] (Crushed Stone Layer 4) The crushed stone layer 4 includes a lower roadbed 10 and an upper roadbed 12. The lower roadbed 10 is constructed above a roadbed 14, and the upper roadbed 12 is constructed above the lower roadbed 10. Examples of materials for the lower roadbed 10 include crusher run, crusher run steel slag, recycled crusher run, cut gravel, mountain gravel, and sand. On the other hand, examples of materials for the upper roadbed 12 include grain-adjusted crushed stone, grain-adjusted steel slag, recycled grain-adjusted crushed stone, and hydraulic grain-adjusted steel slag.

[0022] (Asphalt layer 6) The asphalt layer 6 shown in FIG. 1 includes a base layer 16 and a surface layer 18. The base layer 16 is constructed above the upper roadbed 12 of the crushed stone layer 4. The surface layer 18 is constructed above the base layer 16. Both the base layer 16 and the surface layer 18 may be composed of an asphalt mixture. However, the aggregate used in the base layer 16 may have a different particle size from that used in the surface layer 18. The asphalt mixture constituting the base layer 16 and the surface layer 18 may be a cold asphalt mixture, but is preferably a heated asphalt mixture, which has better durability than a cold asphalt mixture.

[0023] When the upper roadbed 12 is made of a stabilized roadbed material, the upper roadbed 12 is included in the asphalt layer 6, as shown in Fig. 2. On the other hand, in the embodiment shown in Fig. 1, the upper roadbed 12 is not made of a stabilized roadbed material, so the upper roadbed 12 is included in the crushed stone layer 4.

[0024] The stabilized roadbed material can be produced by adding bituminous materials such as straight asphalt to suitable aggregates and then mixing them in a hot mix method. The aggregates can be a mixture of single-grained crushed stone, sand, etc., or crushed run or locally produced materials with supplementary materials such as crushed stone, gravel, steel slag, sand, etc. added as necessary. The stabilized roadbed material can also be cement, lime, or cement with bituminous materials added.

[0025] 1 and 2, the asphalt layer 6 is two-layered, but the asphalt layer 6 may be a single layer. For example, as shown in Fig. 3, the asphalt pavement structure 2 may be configured to include a crushed stone layer 4 including a lower roadbed 10 and an upper roadbed 12, and a single asphalt layer 6. The configuration shown in Fig. 3 is used, for example, on general roads with low traffic volume.

[0026] In addition, in simple pavements and farm roads, asphalt pavement structure 2 may be configured to include crushed stone layer 4 consisting of subbase course 10 and asphalt layer 6 consisting of one layer, as shown in FIG.

[0027] (Reinforcement 8) 1 to 4, the reinforcing material 8 may be embedded between the crushed stone layer 4 and the asphalt layer 6. However, the reinforcing material 8 may also be embedded inside the asphalt layer 6 (for example, between the base layer 16 and the surface layer 18).

[0028] The reinforcing material 8 is made of synthetic resin. It is preferable that the reinforcing material 8 is made of a synthetic resin material that melts at the processing temperature of recycled asphalt (for example, 165°C to 185°C). Examples of materials that melt at the processing temperature of recycled asphalt include polypropylene and polyethylene.

[0029] As shown in Fig. 5, the reinforcing material 8 is formed in a belt shape and transported in a cylindrically wound state. The cylindrically wound reinforcing material 8 is then laid while being unfolded at the construction site. For example, when the asphalt pavement structure 2 is a road, the reinforcing material 8 is laid along the traveling direction of the road. In other words, the reinforcing material 8 is laid so that the longitudinal direction L of the reinforcing material 8 coincides with the traveling direction of the road, and the width direction W of the reinforcing material 8 coincides with the width direction of the road.

[0030] As shown in Fig. 6(a), the reinforcing material 8 is in a mesh shape, and the openings of the reinforcing material 8 may be formed in a quadrilateral shape such as a diamond or a rectangle. The reinforcing material 8 has a plurality of inclined muscles 8a that are inclined with respect to both the longitudinal direction L and the width direction W. In Fig. 6(a), for convenience, one intersection portion 8b where the inclined muscles 8a intersect is shown in white.

[0031] It is important that the reinforcing material 8 satisfies the following conditions (1)-(2). That is, as shown in Fig. 6(a), if the pitch of the intersections 8b in the longitudinal direction L is P1, the spacing between the cutting bits of the road milling machine (not shown) is A, the dimension of the intersections 8b in the longitudinal direction L is B, and the dimension of the longitudinal direction L between adjacent intersections 8b in the diagonal direction T1 or T2 of the diagonal reinforcement 8a (the direction in which the diagonal reinforcement 8a extends) is C, then (1) P1>2A+2B (2) C>A>B It is important to satisfy the following. Generally, the spacing A of the cutting bits of a road milling machine is 15 mm.

[0032] By satisfying the above conditions (1)-(2), long resin waste material is not generated, and the pavement waste material can be easily reused. When the reinforcing material 8 that satisfies the above conditions (1)-(2) is cut along the width direction W by a road surface cutting machine, no waste material having two or more intersection parts 8b is generated, as shown in FIG. 6(b). On the other hand, waste material having two or more intersection parts 8b may be long and connected, resulting in long resin waste material. By satisfying the above conditions, no waste material having two or more intersection parts 8b is generated, and the reinforcing material 8 is cut into small pieces that can pass through a sieve of a predetermined size (for example, a sieve with an opening of about 40 mm). Therefore, the pavement waste material can be easily reused.

[0033] It is also important that the reinforcing material 8 satisfies the following conditions (3)-(4). That is, as shown in Fig. 7(a), if the pitch of the crossing parts 8b in the width direction W is P2, the interval between the cutting bits of the road surface cutting machine is A, the dimension of the crossing parts 8b in the width direction W is D, and the dimension of the crossing parts 8b in the width direction W between adjacent crossing parts 8b in the diagonal direction T1 or T2 of the diagonal reinforcement 8a is E, (3) P2>2A+2D (4) E>A>D It is also important to satisfy the following:

[0034] By satisfying the above conditions (3)-(4), even when the asphalt pavement structure 2 is cut along the longitudinal direction L, no long resin waste material is generated, and the pavement waste material can be easily reused. When the reinforcing material 8 that satisfies the above conditions (3)-(4) is cut along the longitudinal direction L, no waste material having two or more intersections 8b is generated, as shown in FIG. 7(b). Therefore, no long resin waste material is generated, and the reinforcing material 8 is cut into pieces small enough to pass through a sieve of a specified size. This makes it easy to reuse the pavement waste material.

[0035] As shown in FIG. 8(a), the opening of the reinforcing material 8 may be hexagonal. The intersection portion 8b of the reinforcing material 8 shown in FIG. 8(a) extends along the longitudinal direction L. Even in this case, it is important that the reinforcing material 8 satisfies the above conditions (1)-(2). As a result, when the asphalt pavement structure 2 is cut along the width direction W, no waste material having two or more intersection portions 8b is generated, as shown in FIG. 8(b). Therefore, no long resin waste material is generated, and the reinforcing material 8 is cut into small pieces that can pass through a sieve of a predetermined size. This makes it easy to reuse the pavement waste material.

[0036] Furthermore, even when the openings of the reinforcing material 8 are hexagonal, it is important to also satisfy the above conditions (3)-(4). This ensures that when the asphalt pavement structure 2 is cut along the longitudinal direction L, no waste material having two or more intersecting portions 8b is generated, as shown in Figures 9(a) and 9(b). This prevents long resin waste material from being generated, and the reinforcing material 8 is cut into small pieces that can pass through a sieve of a specified size. This makes it easy to reuse the pavement waste.

[0037] The pitch P1 of the intersections 8b in the longitudinal direction L and the pitch P2 of the intersections 8b in the width direction W are preferably 200 mm or less in terms of functioning as the reinforcing material 8. If the pitches P1 and P2 are 200 mm or less, the asphalt material or roadbed material is restrained in the openings of the reinforcing material 8, and the movement of the asphalt material or roadbed material can be reduced.

[0038] (Sheet 20) It is desirable to overlay a sheet 20 that absorbs and holds the asphalt emulsion on the reinforcing material 8. As shown in Figs. 1 to 4, the sheet 20 can be placed on the underside of the reinforcing material 8. Conversely, the sheet 20 may be placed on the upper side of the reinforcing material 8. Alternatively, the sheets 20 may be placed above and below the reinforcing material 8.

[0039] The sheet 20 is made of synthetic resin. Of the synthetic resins, it is preferable that the sheet 20 is made of a material that melts at the processing temperature of recycled asphalt (for example, 165°C to 185°C). As described above, examples of materials that melt at the processing temperature of recycled asphalt include polypropylene and polyethylene.

[0040] The sheet 20 may be made of a nonwoven fabric. The nonwoven fabric for forming the sheet 20 may be made of short or long fibers, but is preferably made of short fibers. When the sheet 20 is made of short fibers, the sheet 20 can be cut more finely when cut with a cutting bit of a road cutting machine, compared to when the sheet 20 is made of a long-fiber nonwoven fabric. Therefore, the waste material of the sheet 20 can easily pass through a sieve of a predetermined size.

[0041] Furthermore, when the sheet 20 is made of short fibers, it can absorb and retain a larger amount of asphalt emulsion compared to long fibers. This allows the sheet 20 to increase the adhesion between the crushed stone layer 4 and the asphalt layer 6, or between the asphalt layers 6 themselves. Furthermore, the sheet 20 exhibits excellent waterproofing properties.

[0042] The sheet 20 should have a thickness that conforms to the irregularities on the upper surface of the crushed stone layer 4. As a result, in the case where the reinforcing material 8 and the sheet 20 are laid between the crushed stone layer 4 and the asphalt layer 6, when the sheet 20 is laid on the upper surface of the crushed stone layer 4, the lower surface of the sheet 20 deforms to conform to the irregularities on the upper surface of the crushed stone layer 4. This increases the contact area between the lower surface of the sheet 20, which has absorbed and retained the asphalt emulsion, and the upper surface of the crushed stone layer 4. As a result, the sheet 20 further enhances the adhesion between the crushed stone layer 4 and the asphalt layer 6.

[0043] Next, a construction method for the asphalt pavement structure 2 as described above will be described.

[0044] When constructing the asphalt pavement structure 2, first, the roadbed 14 is constructed. A known method can be used to construct the roadbed 14. For example, the roadbed 14 can be constructed by excavating the existing ground to a predetermined depth with an excavating machine such as a hydraulic excavator, leveling the top surface of the roadbed 14 with a ground leveling vehicle such as a bulldozer, and then compacting the surface of the roadbed 14 with a compacting vehicle such as a tire roller.

[0045] After constructing the roadbed 14, the crushed stone layer 4 is constructed. When constructing the crushed stone layer 4, the roadbed material carried in by a dump truck is spread on the top surface of the roadbed 14 using a leveling vehicle such as a motor grader. Then, it is compacted by a rolling vehicle. This makes the top surface of the crushed stone layer 4 flat.

[0046] As described above, the crushed stone layer 4 shown in Figures 1 and 3 includes the lower roadbed 10 and the upper roadbed 12, so when constructing the crushed stone layer 4 shown in Figures 1 and 3, a step of constructing the lower roadbed 10 and a step of constructing the upper roadbed 12 are carried out. On the other hand, the crushed stone layer 4 shown in Figures 2 and 4 is mainly composed of the lower roadbed 10, so when constructing the crushed stone layer 4 shown in Figures 2 and 4, it is sufficient to carry out a step of constructing the lower roadbed 10.

[0047] After constructing the crushed stone layer 4, asphalt emulsion is spread on the upper surface of the crushed stone layer 4, and the reinforcing material 8 and the sheet 20 are laid. In this case, the asphalt emulsion is spread on the upper surface of the crushed stone layer 4, and then the sheet 20 is laid, and then the reinforcing material 8 is laid.

[0048] Alternatively, the sheet 20 may be laid on the upper surface of the crushed stone layer 4 first, and then the reinforcing material 8 may be laid on the upper surface of the sheet 20, and then the asphalt emulsion may be spread on the upper surface of the crushed stone layer 4. That is, the asphalt emulsion may be directly spread on the upper surface of the crushed stone layer 4, or the asphalt emulsion may be spread on the upper surface of the crushed stone layer 4 via the reinforcing material 8 and the sheet 20 that have been laid in advance.

[0049] Alternatively, half of the specified amount of asphalt emulsion may be directly spread on the top surface of the crushed stone layer 4, followed by laying the sheet 20 and reinforcing material 8 in that order, and then the remaining asphalt emulsion may be spread over the reinforcing material 8 and sheet 20.

[0050] It is preferable to bond the reinforcing material 8 and the sheet 20 to each other by adhesion, welding or the like before laying the reinforcing material 8 and the sheet 20, as this makes construction easier.

[0051] After laying the reinforcing material 8 and the sheet 20, the asphalt layer 6 is constructed. In the asphalt layer 6 shown in Fig. 1, the base layer 16 and the surface layer 18 are constructed in that order. In the asphalt layer 6 shown in Fig. 2, the upper roadbed 12, the base layer 16, and the surface layer 18 are constructed in that order.

[0052] The upper roadbed 12 can be constructed, for example, by spreading stabilized roadbed material heated to about 150 to 170°C and compacting it uniformly. The base layer 16 and the surface layer 18 are also constructed in a manner similar to the upper roadbed 12, for example, by spreading a heated asphalt mixture heated to about 150 to 170°C and compacting it uniformly. In this manner, the asphalt pavement structure 2 is constructed.

[0053] An asphalt emulsion is spread between each layer constituting the asphalt layer 6. Specifically, in the embodiment shown in Fig. 1, the asphalt emulsion is spread on the upper surface of the base layer 16, and in the embodiment shown in Fig. 2, the asphalt emulsion is spread on the upper surface of the upper roadbed 12 and the upper surface of the base layer 16.

[0054] When the asphalt pavement structure 2 constructed as described above is cut by a road surface cutting machine during road surface repair work, no waste material having two or more intersections 8b is generated, and the reinforcing material 8 and the sheet 20 are cut into small pieces that can pass through a sieve of a specified size. Therefore, no long resin waste material is generated, and the pavement waste material can be easily reused. In addition, because the reinforcing material 8 and the sheet 20 are cut into small pieces, the waste reinforcing material 8 and the waste sheet 20 do not affect the properties of the recycled asphalt.

[0055] If the reinforcing material 8 and the sheet 20 are made of materials that melt at the processing temperature of the recycled asphalt, the waste reinforcing material 8 and the waste sheet 20 will melt and be uniformly mixed into the recycled asphalt when the recycled asphalt is processed. This further reduces the impact on the properties of the recycled asphalt.

[0056] In the above explanation of the construction method, an example was given of embedding the reinforcing material 8 and the sheet 20 between the crushed stone layer 4 and the asphalt layer 6, but the reinforcing material 8 and the sheet 20 may also be embedded inside the asphalt layer 6 (for example, between the base layer 16 and the surface layer 18).

[0057] In addition, in the above explanation of the construction method, an example has been described in which the sheet 20 is laid below the reinforcing material 8, but the sheet 20 may be laid above the reinforcing material 8. Alternatively, the sheet 20 may be laid above and below the reinforcing material 8.

[0058] It is preferable that both the reinforcing material 8 and the sheet 20 are black, since the waste reinforcing material 8 and the waste sheet 20 are less noticeable after the recycled asphalt is laid. [Explanation of symbols]

[0059] 2: Asphalt pavement structures 4: Crushed stone layer 6: Asphalt layer 8: Reinforcement 8a: Oblique muscles 8b: Intersection 10: Lower roadbed 12: Upper roadbed 14: Roadbed 16: Base layer 18: Surface layer 20:Sheet L: Longitudinal direction of reinforcement W: Width direction of reinforcement T1: Direction of inclination of inclined muscle T2: Direction of inclination of inclined muscle P1: Longitudinal pitch of the intersection P2: Width pitch of intersection A: Distance between cutting bits of road milling machine B: Longitudinal dimension of intersection C: The longitudinal dimension between adjacent intersections in the diagonal direction of the diagonal bars D: Width dimension of the intersection E: The width dimension between adjacent intersections in the diagonal direction of the diagonal bars

Claims

1. An asphalt pavement structure in which a synthetic resin mesh reinforcement material is embedded, The reinforcing material has a plurality of inclined bars inclined with respect to both a longitudinal direction and a width direction of the reinforcing material, The longitudinal pitch of the intersection portion where the inclined lines intersect is P1, The spacing between the cutting bits of the road milling machine is A. The dimension of the intersection in the longitudinal direction is B, When the longitudinal dimension between the adjacent intersections in the inclination direction of the inclined bars is C, (1) P1>2A+2B (2) C>A>B While satisfying the above, The pitch of the intersection portions in the width direction is P2, The dimension of the intersection in the width direction is D, When the dimension in the width direction between the adjacent intersection portions in the inclination direction is E, (3) P2>2A+2D (4) E>A>D Asphalt pavement structures that meet the above requirements.

2. 2. The asphalt pavement structure according to claim 1, wherein the openings of the reinforcement are rectangular or hexagonal in shape.

3. 2. The asphalt pavement structure of claim 1, wherein the reinforcing material is formed from a material that melts at the processing temperature of the recycled asphalt.

4. 2. The asphalt pavement structure according to claim 1, wherein the reinforcing material is overlaid with a sheet that absorbs and retains asphalt emulsion.

5. The asphalt pavement structure according to claim 4 , wherein the sheet is formed from a nonwoven fabric.

6. The asphalt pavement structure according to claim 5 , wherein the nonwoven fabric is made of staple fibers.

7. 2. The asphalt pavement structure according to claim 1, comprising a crushed stone layer constructed above the roadbed and an asphalt layer constructed above the crushed stone layer, and the reinforcing material is embedded between the crushed stone layer and the asphalt layer.

8. 2. The asphalt pavement structure according to claim 1, comprising a crushed stone layer constructed above a roadbed, and an asphalt layer constructed above the crushed stone layer, and the reinforcing material is embedded inside the asphalt layer.

9. A synthetic resin mesh reinforcement material to be embedded in an asphalt pavement structure, The reinforcing material has a plurality of inclined reinforcements inclined with respect to the longitudinal direction and the width direction of the reinforcing material, The longitudinal pitch of the intersection portion where the inclined lines intersect is P1, The spacing between the cutting bits of the road milling machine is A. The dimension of the intersection in the longitudinal direction is B, When the longitudinal dimension between the adjacent intersections in the inclination direction of the inclined reinforcement is C, (1) P1>2A+2B (2) C>A>B While satisfying the above, The pitch of the intersection portions in the width direction is P2, The dimension of the intersection in the width direction is D, When the dimension in the width direction between the adjacent intersection portions in the inclination direction is E, (3) P2>2A+2D (4) E>A>D Reinforcement material that meets the requirements.

10. The reinforcement material according to claim 9 , wherein the shape of the openings is square or hexagonal.

11. 10. The reinforcing material of claim 9, formed from a material that melts at the processing temperature of the recycled asphalt.

12. 10. The reinforcement of claim 9, to which is bonded a sheet that absorbs and retains asphalt emulsion.

13. The reinforcement material of claim 12 , wherein the sheet is formed from a nonwoven fabric.

14. The reinforcement material according to claim 13, wherein the nonwoven fabric is made of staple fibers.

15. The reinforcing material according to claim 9, which is embedded between a crushed stone layer and an asphalt layer.

16. The reinforcing material according to claim 9, embedded within an asphalt layer.

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