JP2006342582A - Elastic water permeable pavement material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water permeable pavement material without imparting vibration to the roadside, when forming a hump. <P>SOLUTION: This water permeable pavement material is provided by including a rubber chip, a fibrous substance and a binder, and is characterized in that the fibrous substance exists between particles of the rubber chip. Water permeability and elasticity can be enhanced by interposing the fibrous substance between the particles of the rubber chip. The fibrous substance can use ceramic fiber. Hardness of the pavement material can also be enhanced by further including crushed stones. The rubber chip can be colored in a desired color. Thus, a sign can be expressed on a surface of pavement, and coloring can be held over a long period. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pavement material, and more particularly, to a pavement material suitable for constituting a hump installed on a road in order to alert a passing vehicle and suppress travel speed.

  In order to suppress the traveling speed of the vehicle traveling on the road, one to several structures (humps) having a convex road surface are installed so as to cross the road. The vehicle passing the road surface is shocked by getting over the hump, and the driver is alerted by this shock and tries to decelerate in order to weaken the shock. As a result, the vehicle speed is suppressed.

Various types of humps have been proposed as described in Patent Documents 1 to 3. In addition, as a method for installing the hump, for example, as described in Patent Document 1, a method of forming a pavement material on a road surface by raising the pavement material to a desired shape, and Patent Documents 2 and 3 are described. There is a method of fixing a pre-manufactured hump device to a road surface. As the pavement material, asphalt, cement, resin, which is a material constituting a normal road surface, concrete or mortar using a combination of these, and tiles or blocks are used. In addition, as a material of a hump device manufactured in advance, it has been proposed to use an elastic body such as resin or rubber in order to reduce vehicle vibration or roadside vibration.
Japanese Patent Laid-Open No. 10-30206 JP 2003-49414 A Japanese Patent Laid-Open No. 2004-92358

  On the road surface provided with a hump, there was a problem that rainwater was blocked by the hump and collected, resulting in poor drainage. In addition, there is a demand for a structure in which a moderate impact is given to a vehicle, vibration is hardly given to a road, and noise is low.

  An object of the present invention is to provide a pavement material that is water-permeable and does not easily vibrate along a road when a hump is formed.

  In order to achieve the above object, the present invention provides a water-permeable pavement comprising a rubber chip, a fibrous substance, and a binder, wherein the fibrous substance is present between particles of the rubber chip. Thus, by interposing the fibrous substance between the particles of the rubber chip, water permeability and elasticity can be enhanced. Further, the curing rate can be adjusted by the mixing ratio of the fibrous substance.

  Ceramic fibers can be used as the fibrous material. Ceramic fibers are excellent in heat resistance and can withstand heat generated during construction.

  Moreover, it is possible to further contain crushed stones, thereby increasing the hardness of the paving material. The ratio of rubber chips to crushed stone can be 9: 1. The particle size of the rubber chip and the crushed stone can be made equal.

  Further, according to the present invention, a rubber chip, a fibrous substance, and a binder material are mixed, the resulting mixture is placed on a road surface to be paved, and the binder is cured, whereby fibers are formed between the particles of the rubber chip. A method is provided for producing a pavement layer in which a particulate material is present.

In the present invention, a hump using the paving material can be provided.
That is, the hump includes a base layer and a pavement layer covering the base layer, the base layer is made of a material having water permeability, and the pavement layer is formed by the water-permeable pavement material. It is a characteristic hump. At this time, it is possible to represent the mark on the surface by coloring the rubber chip contained in the pavement layer. The shape of the hump can include a hump main body disposed on the road surface of the entire intersection, and an inclined portion that connects the hump main body and the road surface.

Hereinafter, the elastic water-permeable pavement material of one embodiment of the present invention will be described.
The elastic water-permeable pavement material of the present embodiment is a mixture of rubber chips, a binder, and a fibrous material. By mixing the fibrous substance, the fibrous substance is interposed between the particles of the rubber chip. The binder fixes the rubber chip particles to each other via the fibrous substance by bonding the fibrous substance and the rubber chip particles to each other, and hardens the pavement material. Since there are voids formed by the fibrous material around the rubber chip particles, high water permeability can be realized. Moreover, since the fibrous substance is present, the degree of freedom of deformation of the rubber chip is hardly hindered, and a paving material having high elasticity can be provided.

  In the case of pavement that requires strength, it is possible to add crushed stone in addition to a mixture of a rubber chip, a binder, and a fibrous material. Moreover, in order to improve the adhesiveness between the base layer and the pavement layer, it is possible to apply a pretreatment agent (primer) or the like on the base layer.

  The rubber chip is desirably indeterminate in order to improve the adhesion by the binder, and the surface roughness of the pavement is determined by the particle size. As general pavement, one having a particle diameter of 1 mm to 3 mm is desirable, and one having a particle diameter of about 3 mm is particularly preferable. As a material of the rubber chip, synthetic rubber can be used in addition to natural rubber, and ethylene-propylene-diene rubber (EPDM) can be particularly preferably used. As a material for the rubber chip, waste rubber such as waste tires can be suitably used in addition to virgin rubber (new rubber). As a method of forming a rubber chip into the desired particle size, for example, a method of pulverizing bulk or plate-like rubber to form a chip, or a method of heating and softening and melting a rubber material to form is used. Can do. Moreover, the desired color can be paved by coloring the rubber chip in a desired color.

  The binder is a resin material that can adhere the rubber chip and the fiber resin to each other. For example, a urethane resin can be used.

As the fiber material, ceramic fiber or resin resin can be used. In particular, alumina (Al ₂ O ₃ ), silica (SiO ₂ ), zirconia (ZrO ₂ ), or a ceramic fiber having a mixed composition thereof can be suitably used from the viewpoint of excellent heat resistance and soundproofing.

  The mixing ratio of the rubber chip, the binder, and the fibrous material is determined as follows. The binder is desirably 15 to 25% by weight, particularly preferably 22% by weight, based on the rubber chip. The fibrous material is preferably 1 to 3% by weight, particularly preferably 1.5% by weight, based on the binder. The curing rate can be adjusted by the ratio of the fibrous material.

  When adding crushed stones, those having a particle size of 1 mm to 3 mm are desirable, and those having a particle size of about 3 mm are particularly preferred. Furthermore, a crushed natural stone having an uneven surface is desirable, and for example, Nishiki gravel can be used. By increasing the ratio of crushed stone to rubber chips, the hardness of the pavement material is increased, which is suitable for pavement on the road surface through which the vehicle passes. On the other hand, when the ratio of the crushed stone to the rubber chip is small or when no crushed stone is added, the elasticity of the pavement material is increased and it is suitable as a pavement for human beings. Moreover, when the ratio of the crushed stone with respect to a rubber chip increases, it will become easy to peel the crushed stone from the pavement surface. Therefore, considering these factors, whether or not to add crushed stones and, in the case of adding them, the mixing ratio of rubber chips and crushed stones are set so that desired elasticity, water permeability and durability can be obtained. Usually, the mixing ratio of the rubber chip and the crushed stone is preferably in the range of 8: 2 to 9: 1, particularly preferably 9: 1. When adding crushed stone, the amount of binder is increased. The amount of binder to be increased is about 10% by weight based on the total weight of rubber and crushed stone.

  Below, the manufacturing method of the pavement material of this invention is demonstrated. Here, rubber chips and crushed stone having a particle diameter of 3 mm are used, and the mixing ratio of the rubber chips and crushed stone is 9: 1. As the binder material, a urethane prepolymer solution (product name Takenate F-185, manufactured by Mitsui Takeda Chemical Co., Ltd.) that becomes a urethane resin by curing is used. The amount of the binder is prepared by combining 22% by weight with respect to the weight of the rubber chip and 10% by weight with respect to the total weight of the rubber and crushed stone as an added amount of crushed stone. As the fibrous material, ceramic fiber (product name Fine Flex Bulk Fiber manufactured by NICHIAS Corporation) is used and prepared at a ratio of 1.5% by weight with respect to the binder weight.

  First, after mixing the prepared rubber chip and crushed stone, a binder and a fiber are added and mixed with a mixer. Next, a primer is applied onto the road surface, and then the mixture is placed on the road surface to be paved and flattened to a predetermined thickness by means of a rake, a hot roller, a hot iron or the like. Since the binder material is cured by an exothermic reaction, it is naturally cooled. As described above, the pavement material of the present invention can be easily formed on site.

  The pavement material of the present embodiment has excellent water permeability, sound deadening and sound absorbing properties, and elasticity. Taking advantage of this, by forming the intersection hump using the pavement material of this embodiment, even if it rains, it is difficult for water to collect around the hump, and while giving a moderate impact to the vehicle, the roadside Can suppress vibration and noise to the. Hereinafter, the hump structure and the construction method using the paving material of the present embodiment will be specifically described.

  The hump according to the present embodiment is arranged at the end of the main body 10 and the main body 10 arranged so as to cover the entire intersection as shown in the top view in FIG. 1 and the AA cross-sectional view in FIG. And an inclined portion 11. The upper surface of the main body 10 is parallel to the road surface 20, and the inclined portion 11 connects the road surface 20 of the roads 1 to 4 entering the intersection and the upper surface of the main body 10.

  The height of the main body 10 from the road surface 20 and the inclination angle of the inclined portion 11 with respect to the road surface 20 are experimentally determined in advance so that a certain degree of impact is generated on the vehicle that rides on the main body through the inclined portion 11 from the roads 1 to 4. It is set to the specified height and inclination angle. Here, the height of the main body 10 is 80 mm, and the length of the inclined portion 11 is 2200 mm.

  As shown in FIG. 2, the main body 10 and the inclined portion 11 include a base layer 21, a pavement layer 22 that covers the surface of the base layer 21, and a covering layer 23. The base layer 21 is made of a water-permeable and strong material (for example, water-permeable asphalt concrete). The pavement layer 22 is composed of the pavement material of the present embodiment, and the thickness is about 20 mm. The pavement material which comprises the pavement layer 22 uses the thing containing the rubber chip formed from the waste tire. The covering layer 23 is formed of the paving material of the present embodiment using a virgin rubber chip colored in a desired color. The thickness of the coating layer 23 is about 15 mm.

  A portion of the covering layer 23 that covers the main body 10 uses brick-colored rubber chips, and a portion that covers the inclined portion 11 uses beige-colored rubber chips. Moreover, as shown in FIG. 3, the line 45 indicating the boundary between the shoulder and the road, the mark 44 indicating the center of the intersection, the arrow 43 indicating the vehicle approach direction, and the line 42 of the pedestrian crossing constitute the covering layer 23. A white rubber chip is used, and these lines and marks are displayed. In addition, the area 41 around the pedestrian crossing line 42 is configured such that the entire pedestrian crossing stands out by using a green rubber chip for the covering layer 23.

  The procedure for installing this hump will be described. First, asphalt concrete is raised to the shape shown in FIGS. 1 and 2 over the entire surface of the intersection, and the base layer 21 is formed. A primer is applied to the surface, and a pavement layer 22 and a covering layer 23 are formed thereon using the pavement material of the present embodiment. The method for forming the pavement layer 22 and the covering layer 23 is the same as the method for manufacturing a pavement described above.

  Here, since a pavement material containing rubber chips formed from waste tires is used, the pavement layer 22 is black, but since the covering layer 23 is formed, a hump with a colorful surface can be formed. In the present invention, the coating layer 23 is not necessarily provided, but the rubber chips themselves of the pavement layer 22 are colored, and the color coding of the main body 1 and the inclined portion 11 is performed as in FIG. The arrow 43, the crosswalk line 42 and the surrounding area 41 can be color-coded.

  Since the pavement layer 22 contains a fibrous material, the water permeability is high. On the other hand, the base layer 21 is also made of a water-permeable material. Thereby, since rainwater can permeate | transmit a hump, it does not dam the flow of rainwater, and drainage is good.

  Moreover, the pavement layer 22 has both the elasticity generated by the rubber chips and the strength generated by the crushed stone. As a result, the hump has a certain degree of strength, so that an impact can be given to a vehicle entering the hump at a high speed, and the effect of decelerating can be obtained as in the case of a conventional hump. On the other hand, since the pavement layer 22 has elasticity and the shape of the hump is gentle, when the vehicle passes through the hump, there is almost no impact of the vehicle falling from the hump, and vibration and noise are given to the roadside. Hateful.

  In addition, since the coating layer 23 or the pavement layer 22 itself can be colored, unlike painting, the color can be maintained without being discolored for a long time.

  As shown in FIGS. 1 to 3, the hump body 1 is arranged at the entire intersection so that the boundary of the hump can be recognized by making the height of the hump close to the sidewalk and reducing the level difference. In addition, a pedestrian, particularly a person in a wheelchair or a person pushing a wheelbarrow with a shopping basket, can easily cross the pedestrian crossing 42 and realize a barrier-free intersection.

  Actually, when a hump as shown in FIGS. 1 to 3 was installed at the intersection and the noise at the time of passing the vehicle was measured, it was possible to suppress it to a normal street noise level and to prevent an increase in noise due to the hump. As a result, it was possible to make a hump with less noise and vibration for neighboring residents. In addition, the passing speed of the vehicle was about 10% lower than that before installing the hump, and the proportion of vehicles traveling at 30 km / h or more was halved, which was effective in preventing accidents.

  In addition, since a colorful hump can be realized, both the vehicle driver and the pedestrian can easily recognize the hump and can recognize the presence of an intersection, so that there is a sense of security that the speed of the vehicle can be reduced in advance. Because it is barrier-free, it was well received that it was easy to pass, especially for wheelchair users. In addition, the intersection where the hump is installed is easy to cross without steps, and the elastic pavement is easy to walk with little burden on the elderly, so the number of pedestrians crossing this intersection increases and the flow of people There was also an effect of inducing.

The top view of the hump formed with the pavement material of this Embodiment. FIG. 2 is a cross-sectional view of the hump of FIG. 1 taken along line AA. FIG. 3 is a top view when the pedestrian crossing line 42, the shoulder line 45, the arrow 43, and the like are represented by coloring on the hump in FIG.

Explanation of symbols

1 to 4 ... road, 10 ... hump body, 11 ... inclined portion, 20 ... road surface, 21 ... base layer, 22 ... pavement layer, 23 ... covering layer, 41 ... pedestrian crossing area, 42 ... pedestrian crossing line, 44 ... intersection center line, 45 ... shoulder line.

Claims (9)

Including rubber chips, fibrous materials and binders,
A water-permeable pavement characterized in that the fibrous substance is present between particles of a rubber chip.   The water-permeable pavement according to claim 1, wherein the fibrous substance is a ceramic fiber.   The water-permeable pavement according to claim 1 or 2, further comprising crushed stone.   The water-permeable pavement material according to claim 3, wherein a ratio of the rubber chip to the crushed stone is 9: 1.   The water-permeable pavement according to claim 3, wherein the rubber chips and the crushed stone have the same particle size. Mix at least rubber chips, fibrous materials and binder materials,
A method for producing a pavement layer in which the fibrous substance is present between rubber chip particles by placing the obtained mixture on a road surface to be paved and curing the binder material. A hump including a base layer and a pavement layer covering the base layer,
The base layer is made of a water permeable material,
The hump characterized by the said pavement layer being formed with the water-permeable pavement material of any one of Claim 1 thru | or 5.   8. The hump according to claim 7, wherein the pavement layer is colored with rubber chips contained therein, and the marking mark is represented on the surface by the coloring. The hump according to claim 7 or 8, comprising a hump main body disposed on the road surface of the entire intersection, and an inclined portion connecting the hump main body and the road surface.

Images