JPH11343604A - Pavement material for drainable elastic pavement, manufacture thereof, and drainable elastic pavement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pavement material for drainable elastic pavement equipped with high draining performance and strength without increasing the void ratio. SOLUTION: A pavement material 10 is a flat plate of a thickness of 20 to 50 mm, and is formed by molding a material in which a binder 12 is mixed with fiber-shaped rubber chips 11, and the longitudinal direction of 50% or more of the rubber chips 11 are arranged at an angle of 45 deg. or more to the road surface. The pavement material 10 is formed by applying a pressure to the material into a molded product of a thick plate shape whose longitudinal direction of 50% or more of the rubber chips 11 are arranged at an angle less than 45 deg. to the plane, and this is obtained by cutting nearly perpendicular to the plane and at prescribed intervals to the plane. Further, the pavement material is integrally formed by using forming molds in which a pair of inside surfaces opposedly erected perpendicular to the horizontal plane are arranged at a prescribed narrow space, by filling a material in which the binder 12 is mixed with fiber-shaped rubber chips 11 inside the forming mold, and by vertically pressing them with a pressure.

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 used for general roads and the like, a method for producing the same, and a drainage elastic pavement.

[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 providing a porosity of several tens of percent during molding, high water permeability can be obtained, and sound of a specific frequency transmitted from a vehicle can be absorbed by such a void, so that traffic noise can be significantly reduced. Has excellent properties.

[0003]

However, when the above-mentioned pavement material is used for a general road, the water inside the pavement material is not sufficiently drained at the time of rain or the like. There is a problem that warping and water emerges around the wheels, which lowers the friction coefficient of the road surface during braking. 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 to several tens%, but by increasing the porosity, the strength of the pavement material itself decreases and Also, the rigidity is reduced.
Due to such a decrease in strength, long-term use is not possible and durability is reduced. In addition, since the rigidity decreases, the sinking of the wheels of the traveling vehicle on the road surface increases,
As a result, there is also a problem that the steering stability of the vehicle is impaired.

[0004] Due to the problems described above,
Drainable elastic pavement materials have not yet been widely used for paving general motorways and highways. The inventor of the present invention has devised a method of improving the drainage property by paying attention to the shape and arrangement of rubber chips in order to eliminate the conflicting relationship between the porosity of the pavement material and the strength property with respect to the drainage property of the pavement material. .
That is, the present invention is intended to solve the above-described problems, and does not increase the porosity, and provides a drainage elastic pavement pavement material having high drainage performance and strength, a method for producing the same, and a drainage elastic pavement. The purpose is to provide.

[0005]

Means for Solving the Problems and Effects of the Invention In order to achieve the above object, a structural feature of the invention according to claim 1 is that a material obtained by mixing a binder with a fiber-like rubber chip is molded. Is a pavement material formed by, and adhered to the roadbed to form a drainable elastic pavement,
More than 50% of the rubber chips are arranged at an angle of 45 ° or more with respect to the road surface in the longitudinal direction.

[0006] In the invention according to claim 1 configured as described above, 50% of the fiber-like rubber chips are used.
As described above, since the longitudinal direction is arranged at an angle of 45 ° or more with respect to the road surface, the gap between the rubber chips is correspondingly arranged vertically with respect to the road surface.
Therefore, it is possible to drain the water that falls on the road surface during rainfall or the like very smoothly through the gaps between the rubber chips arranged in the vertical direction. In addition, there is no need to increase the porosity in comparison with the prior art in order to enhance drainage, so that the strength and rigidity of the pavement material are not reduced. As a result, according to the first aspect of the invention, it is possible to prevent a decrease in the friction coefficient of the road surface during rainfall or the like while maintaining the strength of the pavement material, and to effectively reduce the hydroplaning phenomenon when braking is applied to the vehicle. Can be suppressed. In addition, it is possible to prevent a decrease in durability and to suppress the vehicle from sinking from the road surface.

A structural feature of the invention according to claim 2 is that a material obtained by mixing a binder with a fiber-like rubber chip is filled in a mold having a rectangular parallelepiped concave portion, and a pressing force is applied to the material from a flat surface side. In addition, by further heating and curing, a rectangular parallelepiped molded article is formed in which 50% or more of the rubber chips are arranged at an angle smaller than 45 ° with respect to the plane, and the molded article is substantially formed with respect to the plane. It is to form a plate-shaped pavement material by cutting vertically and at predetermined intervals.

[0008] In the invention according to claim 2 configured as described above, when a pressing force is applied to the rectangular parallelepiped material from the flat surface side during molding, 50% or more of the fiber-like rubber chips have a longitudinal direction that is flat. On the other hand, the horizontal state is set at an angle smaller than 45 °, and the horizontal state is fixed by a subsequent heat curing treatment. By cutting the rectangular parallelepiped molded product thus formed substantially perpendicularly to the plane and at a predetermined interval, a plate-like shape in which rubber chips are arranged in a state of good perpendicularity as viewed from the cut surface. Paving material can be obtained. By adhering and attaching this pavement material to a road surface, a drainage elastic pavement having good drainage performance can be formed. In addition, since the porosity of the pavement material is not increased, high strength and rigidity are secured, and a decrease in durability can be prevented, and sinking of the wheel into the pavement material can be prevented.

[0009] A structural feature of the invention according to the third aspect is that a pair of vertical mold parts which are erected perpendicularly to a horizontal plane and whose inner wall surfaces opposed to each other are arranged at a predetermined narrow interval. Using a mold having a mold, filling the mold with a material in which a fiber-like rubber chip is mixed with a binder, applying a pressing force in the vertical direction, and further heating and curing, so that 50% or more of the rubber chip is in the longitudinal direction. Is to form pavement materials arranged at an angle of 45 ° or more with respect to the inner wall surface.

According to the third aspect of the present invention, it is possible to obtain a pavement material in which rubber chips are vertically arranged on the plane side by integral molding without cutting the molded product. As a result, according to the third aspect of the invention, similarly to the second aspect of the invention, it is possible to easily obtain a pavement material having good drainage performance and high strength.

A structural feature of the invention according to claim 4 is that a pavement material formed by molding a material in which a binder is mixed with a rubber chip is adhered to a roadbed of a road to form a drainage material. An elastic pavement having a rubber chip in a fiber shape at a specific place on a road, and 50% or more of the rubber chip having a longitudinal direction of 4% with respect to the road surface.
Pavement materials arranged at an angle of 5 ° or more are provided. The specific place is an intersection, a curve, or the like at which braking is applied to the vehicle.

In the invention according to claim 4 having the above-described structure, the pavement material in which 50% or more of the rubber chips are arranged at an angle of 45 ° or more with respect to the road surface, Because of its excellent performance, it is possible to very smoothly drain water that falls on the road surface during rainfall or the like. Therefore, by arranging this pavement material having good drainage property in a specific place where braking is applied to vehicles such as intersections and curves, it is possible to prevent a decrease in the coefficient of friction of the road surface in rainy weather, etc. The braking of the vehicle is appropriately performed while suppressing the planing phenomenon. In addition, since the drainage performance can be improved without increasing the porosity of the pavement material, the strength and rigidity of the pavement material can be maintained at high values.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a drainage elastic pavement adhered to the roadbed of an automobile running road according to the embodiment. FIG. 1 is a perspective view of a pavement material (hereinafter, referred to as a pavement material). The pavement material 10 is a flat plate having a thickness of 20 to 50 mm, and a fiber-shaped (spun spindle type) rubber chip 11 is used as a rubber chip aggregate. As a result, 50% or more of the rubber chips are arranged at an angle of 45 ° or more with respect to the plane P (corresponding to the road surface). And paving material 1
The spring constant of 0 may be 30 to 120 kgf / mm, and is more preferably 40 to 100 kgf / mm. The amount of the binder and the porosity are not particularly limited, but the binder is preferably 5 parts by weight or more based on 100 parts by weight of the rubber chip, and the porosity is 20 to 40 parts by weight.
% Is preferable. Also, the binder is not limited to urethane, but may be epoxy or the like.

Next, a method for manufacturing a pavement material will be described in detail. The urethane-based binder 12 is mixed with the fiber-shaped rubber chip 11, and the mixed material M is poured into a mold K1 having a thick block-shaped recess as shown in FIG.
Before the mixed material M is solidified, the mixed material M is pressed with an upper mold K2 to apply a pressing force. As a result, the rubber chip 11 flows so that its longitudinal direction is horizontal as shown in the figure. In this state, the mixed material M is cured by performing a heat treatment at 150 ° C. for 10 minutes to obtain a thick block-shaped molded product.

The pavement material 10 according to the present invention is obtained by cutting this molded product at a predetermined width perpendicular to the plane P. This paving material 10 is 50% of the rubber chips.
As described above, the longitudinal direction is arranged at an angle of 45 ° or more with respect to the plane P. As shown in FIG. 3, the pavement material 10 is fixed to a concrete or asphalt roadbed 14 provided on the ground 15 by bonding using an epoxy-based adhesive or a urethane-based adhesive 13. It is formed. Since the pavement material 10 has a structure in which the fiber-like rubber chips 11 are arranged vertically to the road surface, the gap between the rubber chips 11 is also smoothly connected in the vertical direction from the surface of the pavement material 10 to the bottom surface. In addition, the water that pours on the road surface during rainfall or the like can be smoothly drained to the back side through the gap. Moreover, since the porosity is not increased in comparison with the prior art in order to enhance drainage, the strength and rigidity of the pavement material are not reduced.

As a result, in the drainage elastic pavement using this pavement material, it is possible to prevent a decrease in the friction coefficient of the road surface at the time of rainfall or the like, and to suppress the hydroplaning phenomenon at the time of braking of the vehicle and to appropriately brake the vehicle. it can. Also, since the decrease in the strength and rigidity of the paving material can be suppressed without increasing the porosity of the paving material, the durability can be reduced, the sinking of the wheels can be reduced, and the steering stability of the vehicle can be improved. Can be maintained well.

Next, the second method for producing the paving material will be described in detail. In this manufacturing method, as shown in FIG.
A pair of vertical molds R1 facing each other on a horizontal base R are vertically formed with a predetermined narrow interval between inner wall surfaces S.
The space between the other pair of molds (not shown) is widened. The mold is filled with a mixed material M obtained by mixing a binder with a fiber-like rubber chip, and a pressing force is applied in a vertical direction, so that 50% of the rubber chip is removed.
As described above, the longitudinal direction can be arranged at an angle of 45 ° or more with respect to the inner wall surface S. In this state, the mixed material M is subjected to a heat treatment at 150 ° C. for 10 minutes to be cured, whereby the pavement material 10 as a thick flat plate-shaped molded product is obtained. That is, it can be used as a pavement material by directly bonding to a road surface without cutting the molded product as in the first production method, and has the same effect as the pavement material obtained by the first production method. Obtainable.

The pavement material 10 of the present invention can be used on the entire surface of a road. However, considering that the drainage performance is better than that of a pavement material having a random arrangement of rubber chips, the arrangement of the rubber chips is It can be arranged at a required part of a road on which a random pavement material is laid, for example, at a specific place where braking is applied to a vehicle such as an intersection or a curve. As a result, since the road surface is drained well in rainy weather or the like, a reduction in the friction coefficient of the road surface during braking of the vehicle can be prevented, and the effect of suppressing the hydroplaning phenomenon and appropriately performing braking can be obtained.

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

[Brief description of the drawings]

FIG. 1 is a schematic view schematically showing a pavement material according to an embodiment of the present invention.

FIG. 2 is a schematic view showing a forming step of the pavement material.

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

FIG. 4 is a schematic view showing another forming method of the pavement material.

[Explanation of symbols]

10: Paving material, 11: Fiber-like rubber chip, 12:
Binder, 14 ... the roadbed.

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 (4)

[Claims] 1. A plate-like pavement material formed by molding a material in which a binder is mixed with a fiber-like rubber chip, and bonded to a roadbed to form a drainable elastic pavement. A pavement material for drainable elastic pavement, wherein at least 50% of the pavement material has a longitudinal direction arranged at an angle of 45 ° or more with respect to a plane constituting a road surface. 2. A material obtained by mixing a binder with a fiber-like rubber chip is filled in a mold having a rectangular parallelepiped concave portion,
A pressing force is applied to the material from the flat surface side, and the material is further cured by heating to form a rectangular parallelepiped molded product in which 50% or more of the rubber chips are arranged at an angle of less than 45 ° with respect to the plane. A method for producing a drainable elastic pavement paving material, characterized in that a plate-like pavement material is formed by cutting the molded article substantially perpendicularly to the plane and at predetermined intervals. 3. A molding tool having a pair of vertical mold parts which are provided upright at a vertical interval with respect to a horizontal plane and are disposed at a predetermined narrow interval between inner wall surfaces facing each other, and a fibrous mold is provided in the molding mold. By filling a rubber chip with a material mixed with a binder, applying a pressing force in the vertical direction, and further heating and curing, 50% or more of the rubber chip has an angle of 45 ° or more with respect to the inner wall surface. A method for producing a pavement material for drainable elastic pavements, wherein the pavement materials arranged in the manner described above are formed. 4. A drainable elastic pavement formed by bonding a pavement material formed by molding a material in which a binder is mixed with a rubber chip to a roadbed, wherein the rubber chip is provided at a specific location on a road. Is a fibrous shape, and a pavement material is provided in which at least 50% of the rubber chips are arranged so that their longitudinal direction is at an angle of 45 ° or more with respect to a road surface. pavement.