JPH11280006A - Pavement material for draining elastic pavement, and draining elastic pavement structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pavement material for a draining elastic pavement, having high adhesive force to a roadbed and excellent in performance for draining water impregnated in the material in raining. SOLUTION: Drain grooves 11 each of which has the semicircular section are provided on a contact surface 10b side to a roadbed 13, in a pavement material 10. The drain grooves are so inclined as to be prevented from being simultaneously trampled by both wheels of a vehicle, and they are provided at such angles that the wheel on the road center C side passes the drain groove earlier than the wheel on the road shoulder K side. The pavement material is fixed by being bonded to the roadbed provided on the ground surface 14 by using adhesives 12. Since a time lag is generated in pressing of both wheels of the vehicle to the drain grooves, water in the drain grooves can be efficiently drained by both right and left wheels, and water in the pavement material can be efficiently drained. Therefore, water can be restrained from rising to the surface of the pavement material caused by traveling of the vehicle, strength of the pavement material is secured, and the coefficient of friction in braking can be prevented from being deteriorated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage elastic pavement material used for general roads and the like, and a drainage elastic pavement structure using the same.

[0002]

2. Description of the Related Art Conventionally, as a pavement material for this kind of drainable elastic pavement, for example, as disclosed in Japanese Patent Application Laid-Open No. 63-315708, an elastic material such as rubber chips obtained by pulverizing rubber products such as automobile waste tires is disclosed. There is known an aggregate obtained by mixing a binder such as urethane or epoxy with an aggregate. This pavement material is elastic and softer than normal asphalt pavement by using rubber material, and
By setting the porosity to several tens of percent during molding, high water permeability can be obtained, and sound of a specific frequency transmitted from the vehicle can be absorbed by the gap, so that traffic noise can be significantly reduced. Has excellent properties.

[0003]

However, when the pavement material is used for a general road, the water inside the pavement material is not completely drained at the time of rain or the like. There is a problem in that the water floats around the wheels and the friction coefficient of the road surface during braking decreases. Furthermore, it is necessary to have a high adhesive strength to the roadbed.However, with conventional pavement materials, since the water inside the pavement material is not completely drained, the adhesion between the roadbed and the Reliability could not be secured. On the other hand, in order to improve the drainage performance of the pavement material, it is necessary to increase the porosity of the pavement material, but by increasing the porosity, the strength of the pavement material itself decreases as described above, The stiffness will also decrease.

[0004] Further, by increasing the porosity of the pavement material to several tens of percent, the rigidity of the pavement material is reduced, so that the sinking of the wheels of the traveling vehicle into the pavement material is increased, and as a result, There is a problem that steering stability is impaired. Therefore, it is necessary to consider the problem of sinking into the pavement material of the vehicle due to other characteristics other than the porosity. Due to the above-described problems, the drainable elastic pavement material has not been widely used for paving general motorways or expressways. An object of the present invention is to solve the above-mentioned problems, and to provide a drainage elastic pavement pavement material and a drainage elastic pavement which have excellent drainage of water penetrating into the interior during rainfall and the like, and have high adhesion to a roadbed. The purpose is to provide a structure.

[0005]

Means for Solving the Problems and Effects of the Invention In order to achieve the above object, the constitutional feature of the first aspect of the present invention is that the material is formed by molding a material obtained by mixing a binder with an elastic aggregate. And a plate-like pavement material adhered to a roadbed of a road to form a drainable elastic pavement, wherein a drain groove is provided on a contact surface side with the roadbed.

According to the first aspect of the present invention, the drainage grooves are provided on the contact surface of the pavement material with the roadbed, so that the drainage water absorbed by the pavement material is drained during rainfall or the like. It is efficiently performed by the groove, and the emergence of water from the paving material can be suppressed when the vehicle is running. As a result, according to the first aspect of the present invention, a decrease in the friction coefficient of the road surface during braking can be suppressed, and the hydroplaning phenomenon can be suppressed. Further, since the drainage is performed smoothly, it is possible to suppress a decrease in the strength of the pavement material and the adhesive strength with the roadbed.

[0007] Further, a structural feature of the invention according to claim 2 is that in the paving material for drainable elastic pavement according to claim 1, the drain groove is inclined at a predetermined angle with respect to the vehicle traveling direction. That is, both wheels of the vehicle are arranged so as not to step on the drainage groove at the same time.

According to the second aspect of the present invention, since there is a time difference between the pressing of the two wheels of the vehicle to the drain groove, the water in the drain groove can be efficiently pushed out by the left and right wheels. In addition, the water in the pavement material can be efficiently drained. As a result, according to the invention of claim 2,
In addition to the effect of the first aspect of the present invention, it is possible to suppress the emergence of water on the road surface when the vehicle is running, and it is possible to more effectively suppress the decrease in the friction coefficient during braking.

According to a third aspect of the present invention, there is provided the paving material for drainable elastic pavement according to the second aspect, wherein the predetermined angle of the drain groove is such that the wheel on the road center side of the vehicle is on the road. It is the angle that passes through the drainage ditch before the roadside wheel. In the invention of claim 3 configured as described above, in addition to the effect of the invention of claim 2, water in the drainage can be efficiently pushed out to the road shoulder side by the left and right wheels, and the water in the pavement material can be pushed out. Can be efficiently drained.

According to a fourth aspect of the present invention, there is provided the pavement material for drainable elastic pavement according to any one of the first to third aspects, wherein the drainage groove has one end in the longitudinal direction. The cross-sectional area increases from the side to the other end. In the fourth aspect of the present invention, in addition to the effects of the first, second, and third aspects, the drainage from the one end in the length direction of the drainage groove to the other end is efficiently performed. Can do well. For example, by setting one end to the center of the road and the other end to the shoulder of the road, drainage from the center to the shoulder of the road can be performed smoothly.

According to a fifth aspect of the present invention, in the pavement material for drainable elastic pavement according to any one of the first to third aspects, the drain groove is divided into a plurality of portions. The cross-sectional area of each part is increased from one end to the other end in the length direction. In the invention of claim 5 configured as described above,
In addition to the effects of the first, second, and third aspects of the present invention, drainage can be efficiently performed from one end side to the other end side in the length direction of the drainage groove, and the drainage groove is divided into units. Since the portions are provided repeatedly, backflow of water from the other end to the one end can be prevented.

According to a sixth aspect of the present invention, in the paving material for drainable elastic pavement according to any one of the first to fifth aspects, the spring constant is 30 to 120.
kgf / mm. The spring constant is 4
More preferably, it is 0 to 100 kgf / mm.
According to the sixth aspect of the invention configured as described above, in addition to the effects of the first, second, third, fourth and fifth aspects, the sinking of the wheel can be reduced, and good noise absorption and drainage properties can be obtained. Is obtained.

According to a seventh aspect of the present invention, a groove-shaped drainage channel is provided at a roadbed position in contact with the drainage groove according to any one of the first to sixth aspects. It is in. In the invention according to claim 7 configured as described above, in addition to the drainage effect of only the pavement material, the drainage water provided in the roadbed can drain the water absorbed by the pavement material more efficiently.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of a drainage adhesive bonded to a roadbed of a road for driving a car. FIG. 1 is a perspective view showing a pavement material for elastic pavement (hereinafter, referred to as a pavement material). The pavement material 10 has a thickness of 20 to 50 mm.
Of rubber chip aggregate (spindle type, mesh type, rough type, cloth type etc.)
A urethane-based binder was mixed, compression-molded, and
It is cured and formed by performing a heat treatment at 0 ° C. for 10 minutes. And the spring constant of the paving material 10 is 30 to 120 k
gf / mm, but more preferably 40 to 10
0 kgf / mm. The amount of the binder and the porosity are not particularly limited, but the amount of the binder is
It is preferably at least 5 parts by weight based on parts by weight, and the porosity is preferably in the range of 20 to 40%.
For example, FIG. 4 shows the results of measuring the spring constant using a sample having a binder amount of 5 to 20 parts by weight and a porosity of 20 to 40% when the rubber chip is 100 parts by weight.

For the measurement of the spring constant E, 100 mm
φ × 30 mm measurement sample (area S = 78.5 cm
² ) is prepared, a load P is applied thereto, and the deformation amount (corresponding to the sinking amount of the wheel) t at that time is measured.

[0016]

## EQU1 ## t = P / [T × (E / S)]

For example, a 10-ton truck (tire 10)
Assuming a tire contact area T = 400 cm ² )
Load P = 10 tons / 10 = 1 tons = 1000 kg, and when E = 50 kgf / mm, t = 3.9 mm. When E = 30 kgf / mm, t = 6.5 mm, and when E = 120 kgf / mm, t = 1.6 mm. It is necessary to select an appropriate value for the spring constant E according to the purpose of the road, the type of passing vehicle, and the like.

As shown in FIGS. 1 and 2, the pavement material 10 has a drain groove 11 having a semicircular cross section of a predetermined radius (about 10 mm when the thickness of the pavement material is 30 mm) on the contact surface 10 b side with the roadbed 13. Is provided. The drain groove 11 is inclined at an angle that cannot be stepped on by both wheels of the vehicle at the same time, and such an angle that the wheel on the road center C side of the vehicle passes through the drain groove 11 before the wheel on the road shoulder K side. Is provided. As shown in FIG. 3, the pavement material 10 is a concrete or asphalt roadbed 13 provided on the ground 14.
Is fixed by bonding using an epoxy-based adhesive or a urethane-based adhesive 12 to form a drainage elastic pavement structure.

The pavement material 10 constructed as described above has the drain grooves 11 inclined as described above with respect to the running direction of the vehicle on the side of the contact surface 10b with the roadbed 13, so that the wheels on both sides of the vehicle are provided. Since there is a time difference in the pressing on the drain groove 11, the water in the drain groove 11 can be efficiently pushed out by the left and right wheels, and the water in the pavement material 10 can be efficiently drained. Therefore, at the time of rain, etc., it is possible to suppress the emergence of water on the surface 10a of the pavement material 10 due to the traveling of the vehicle,
The strength of the paving material 10 can be ensured, and a reduction in the friction coefficient during braking can be prevented. Also, the inclination angle of the drain groove 11 is
Since the wheel on the road center C side of the vehicle is provided at an angle such that it passes through the drain groove 11 before the wheel on the road shoulder K side, the water in the drain groove 11 is efficiently directed to the road shoulder K side by both left and right wheels. The water in the pavement material 10 can be efficiently drained.

The pavement material 10 has a spring constant of 30 to 1
Since it is set to an appropriate value within the range of 20 kgf / mm,
The sinking of the wheels of, for example, a 10-ton truck into the pavement material 10 can be reduced to about 1.6 mm to 6.5 mm, and the steering stability of the vehicle can be maintained well. Also, the porosity is 20 to
Since it is within the range of 40%, good noise absorption can be obtained.

Next, a second embodiment will be described. In the present embodiment, the paving material 20 is the same as that shown in FIG.
As shown in (a) and (b), the cross-sectional area of the drain groove 21 is increased from the road center C side end 21a to the road shoulder K side end 21b. As a result, drainage to the shoulder K side can be performed more efficiently,
During rainfall or the like, water seepage from the surface 20a of the pavement material 20 can be suppressed, and a decrease in the friction coefficient of the surface can be prevented. Further, the strength of the paving material 20 is reduced, and
Of the bonding strength to the roadbed 13 can be suppressed.

Next, a third embodiment will be described. In the present embodiment, as shown in FIG. 6, the pavement material 30 has a drain groove 31 divided into a plurality of unit portions 31a. The cross-sectional area is made larger toward the end of. Thereby, drainage to the road shoulder K side can be performed more efficiently, and the drainage groove 3
As 1, the backflow of water from the road shoulder K side to the road center C side can be prevented by the structure in which the divided unit portions 31a are repeatedly provided.

Next, as a fourth embodiment, as shown in FIG. 7, the drain grooves 11 (2, 2) of the pavement material 10 (20, 30) are formed.
1, 31), the groove-shaped drainage channel 1
5 is provided. As a result, compared with the case where the drainage groove is provided only in the pavement material, the shoulder K of the water absorbed by the pavement material is obtained.
The drainage to the side can be performed more efficiently.

In each of the above embodiments, the inclination of the drainage groove may be reversed, or may be perpendicular to the traveling direction of the vehicle. Further, the outer shape and dimensions of the pavement material are not limited to those described in the above embodiment.

Further, in each of the above embodiments, the spring constant of the paving material does not necessarily need to be in the range of 30 to 120 kgf / mm. Further, the elastic aggregate is not limited to a single rubber chip, but may include a piece of wood or the like. The binder is not limited to urethane, but may be epoxy or the like.

The drainage elastic pavement structure is used not only for roads but also for fields on promenades and stadiums.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a pavement material according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a drainable elastic pavement using the same paving material.

FIG. 3 is a sectional view showing a drainage elastic pavement structure using the same pavement material.

FIG. 4 is a graph showing a relationship between a spring constant of the pavement material and a binder amount using a porosity as a parameter.

FIG. 5 is a plan view and a side view showing a pavement material according to a second embodiment.

FIG. 6 is a plan view and a side view showing a pavement material according to a third embodiment.

FIG. 7 is a sectional view showing a drainable elastic pavement structure according to a fourth embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Paving material, 11 ... Drainage groove, 12 ... Adhesive, 13 ... Roadbed, 14 ... Ground, 15 ... Drainage channel, 20 ... Pavement material, 21 ...
Drain gutter, 30: pavement material, 31: drain gutter, 31a: unit part.

Continued on the front page (72) Inventor Masaaki Hamada 3600, Gezu, Kitagaiyama, Kodai, Komaki, Aichi Prefecture Inside (72) Inventor Hiroyuki Noda 3600, Gezu, Kitagaiyama, Kodai, Komaki, Aichi Industrial Co., Ltd.

Claims (7)

[Claims] 1. A plate-like pavement material formed by molding a material in which a binder is mixed with an elastic aggregate, and is adhered to a roadbed of a road to form a drainable elastic pavement. A pavement material for drainage elastic pavement, wherein a drainage groove is provided on the contact surface side. 2. The pavement material for drainable elastic pavement according to claim 1, wherein the drain groove is inclined at a predetermined angle with respect to a vehicle traveling direction, and both wheels of the vehicle do not simultaneously step on the drain groove. Pavement material for drainage elastic pavement, characterized by being arranged as follows. 3. The pavement material for drainable elastic pavement according to claim 2, wherein the predetermined angle of the drainage groove is such that a wheel on a road center side of the vehicle is provided with the drainage groove before a wheel on a road shoulder side. A pavement material for drainable elastic pavement, characterized by an angle of passage. 4. The pavement material for drainable elastic pavement according to claim 1, wherein the drainage groove has a cross-sectional area that increases from one end to the other end in the length direction. A pavement material for drainable elastic pavements, characterized in that the pavement material is made into a drainage elastic pavement. 5. The pavement material for drainable elastic pavement according to claim 1, wherein the drain groove is divided into a plurality of portions, and each of the portions is arranged from one end in the length direction. A pavement material for drainable elastic pavement, wherein a cross-sectional area is increased toward each other end. 6. The pavement material for drainage elastic pavement according to claim 1, wherein the spring constant is 3
A pavement material for drainable elastic pavement, which has a weight of 0 to 120 kgf / mm. 7. A drainable elastic pavement structure, wherein a groove-shaped drainage channel is provided at a position of the roadbed in contact with the drainage channel according to any one of claims 1 to 6.