JPH0444199A - Road marker material - Google Patents

Abstract

PURPOSE:To improve discriminability and to extend service life by using ceramic particles colored the surface layer or up to the core part as road marker materials. CONSTITUTION:Ceramic particles 2 colored the surface layer or up to the core part are used as road marker materials, and a cement plate 1 in which ceramic particles 2 are buried or a sheet to which ceramic particles are stuck is used as road marker materials. Coloring matters like a pigment are mixed and kneaded in various ceramic materials and they are sintered to obtain ceramic particles 2, and these particles are colored the surface layer or up to the core part, and the compression strength and the wear resistance are considerably increased by sintering. Thus, the road marker materials which are superior in discriminability and have a satisfactory durability are obtained.

Description

[Detailed description of the invention] (Industrial application field) TECHNICAL FIELD This invention relates to road sign materials.

More specifically, the present invention relates to a new road sign material with excellent wear resistance, distinguishability, etc.

(Conventional technology and its issues) Conventionally, various signs have been installed on concrete or asphalt paved roads to indicate center lines, no overtaking, no U-turns, or dangerous areas such as sharp curves. . Various types of these signs are known, such as those that are displayed in different colors or as three-dimensional shapes.

However, most of the conventional road signs for identification display use synthetic resin paint containing white or yellow pigments applied to the road surface as a marking material, which causes significant wear from automobile tires. Also, white and yellow pigments are sensitive to ultraviolet rays, so
Peeling due to discoloration and deterioration is inevitable. For this reason,
Reapplication is often required. however,
Work in areas where these signs are displayed is dangerous and can cause traffic congestion.

For this reason, there has been a strong desire to realize a marking material with good identifiability and a long life as an alternative to the conventional coated marking material.

On the other hand, identification materials that display three-dimensional shapes are also known, but these are often difficult for drivers to distinguish unless they are displayed in color. It is also dangerous for the driver as it causes abnormal driving.

This invention was made in view of the above circumstances, and aims to provide a new road sign material that eliminates the drawbacks of conventional road sign materials, has excellent identifiability, and has good durability. It is said that

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a road sign material characterized by being made of ceramic grains colored to the surface layer or core.

The present invention also provides a road sign material in which the ceramic grains are embedded in a cement plate or adhered to a sheet.

The ceramic grains of this invention are obtained by mixing and kneading coloring materials such as pigments with various ceramic raw materials and sintering the mixture, and the surface layer or even the core of the grains is colored, and the ceramic grains are sintered crystals. It is characterized by its extremely high compressive strength and abrasion resistance.

For example, ordinary porcelain materials can be used as these ceramic grains, and in addition to these, mixtures of various silicates, aluminum silicate minerals, and the like can be used. Ceramic grains of various colors can be easily produced by selecting pigments. The method for manufacturing a fishing boat has already been proposed by the inventors of the present invention and is technically established.

Further, by making the ceramic grains spherical, the ceramic grains have an excellent diffused reflection effect of light.

Not only during the day, but especially at night, when illuminated by headlights, the marking material of this invention reflects light diffusely, making it appear much brighter and clearer to drivers than conventional paint-type markings. There is.

The road marking material made of ceramic grains of the present invention can be used for roads in various ways.

Ceramic particles may be partially embedded in the concrete or asphalt road surface, for example, about 1/2 to 2/3 of their diameter, or they may be embedded in a cement plate in advance and then this plate is placed on the road. May be placed.

Due to this partial embedding, some of the ceramic grains are in a protruding state, so they are less likely to get dirty with sand or get buried by rainwater.

In addition, for areas that are not subject to much load, places that urgently require marking, or places where signs are frequently changed, the colored ceramic grains of this invention can be attached to a sheet and resin coated as necessary. It can also be reinforced and installed on the road surface.

The exposed surface portions of the ceramic grains can be polished to further enhance the effect.

In either case, they may be provided over the entire surface of the road. For example, in dangerous areas such as sharp curves, places with poor visibility, and near construction sites, the road marking material of this invention can be placed over the entire road surface, and it will work well as a color-coded sign. The minute vibrations and sounds caused by the shape stimulate the driver's senses, making it possible to further improve the identification performance of the sign.

EXAMPLES Hereinafter, the road sign material of the present invention will be explained in more detail by showing examples.

Examples 1 to 2 Two types of ceramic grains colored white to the core with a grain size of 2 to 4 round and a grain size of 6 to 8 III were each embedded in a cement plate by about 2/3 of their diameter. A flat plate was prepared.

The frictional force of these two types of flat plates in dry and wet conditions was compared with that of an asphalt pavement surface and a concrete floor.

Originally, the evaluation should be made on car tires, but we experimentally evaluated the case of tennis shoes by taking into account the tire tread and material.

Table 1 shows the results.

As is clear from Table 1, in the case of the ceramic grain flat plate (Example 1) with a grain size of 2 to 4Iw+, the coefficient of friction is 56 to 71% higher than that of the Kotsucrete floor (Comparative Example 2). Recognize.

It can be seen that the sign material of the present invention provides a large braking effect and anti-slip effect.

Example 3 A formwork with a width of 150III+, a length of 500mm and a depth of 30mm is prepared, concrete is poured into it, and before it hardens, white ceramic grains with a diameter of 6 to 8fl+ are poured into it.
200 to 230 particles were dispersed per each particle to the extent that they were in contact with each other. The particles were evenly pressed from above with a plate until 60 to 70% of the diameter of each particle was embedded in the concrete, and the formwork was removed after the concrete had hardened.

The obtained concrete product, for example, as shown in FIG.
20 units of the product consisting of ) were buried in a hole 160mm wide and 10m long dug in the asphalt-paved truck yard in the factory, 2 to 3 inches higher than the foundation surface.
The surrounding area was melted and fixed with a burner to form a center line.

I drove the truck along this line and consciously repeatedly applied the brakes suddenly. Even after 3 years, there was almost no wear of the grains, and no drop-off of the grains or deterioration of the white color was observed.

On the other hand, in the case of conventional coating-type center line, re-coating was required every six months.

In addition, in the case of ceramic white grains, light was reflected prominently even during heavy rain at night, and the center line was clearly visible even at night even when it was not raining.

However, in the case of the conventional coating-type center line, it was submerged in water during heavy rain at night and became almost invisible.

Example 4 As shown in Fig. 2, an epoxy resin (12) is applied to a thickness of 2111I on the top surface of an SBR sheet (11) cut out in the shape of an arrow indicating the direction of travel of the automobile, and a natural porcelain material is applied on top of the SBR sheet (11). 300 red ceramic grains (13) with a particle size of 300 mm made from a pigment and a pigment were dispersed per 11 liters of 100 C, and 2/3 of the particle size was embedded and fixed.

The obtained sheet-like body (14) was used by adhering it to the entrance/exit of a gas station with an elastic epoxy resin adhesive. Two years have passed since 20,000 cars, trucks, etc. passed through it each year, but no ceramic grains had fallen off, and there was no deterioration of the red color at all.

Although a slight amount of wear was observed on the surface of the ceramic grains, the entire core was colored red, so
No deterioration of the red color was observed at all.

Example 5 As shown in Figure 3, where the road curves,
White ceramic particles (21) were embedded in parallel to the road and a strip material (22) was disposed thereon. Two-thirds of the particle diameter of the ceramic particles (21) was embedded in the asphalt surface (23).

Even at night and in the rain, this white line could be clearly identified by the driver, and the ceramic grains (21) bit into the tire tread to effectively prevent lateral slipping.

On the other hand, in the conventional case where a protrusion is simply formed, the driver may not be able to clearly see the protrusion in advance, and there is a risk that the driver may take control of the steering wheel due to the sudden appearance of the protrusion.

(Effects of the Invention) As explained in detail above, the present invention improves the identifiability as a road sign material and significantly extends its lifespan. In addition, its shape increases the reflectance of colored light, making it easier to see, and prevents dirt, dust, rainwater, etc. from staining or sinking. In addition, in the case of sheet-like materials, not only the workability of laying them but also the ability to respond to emergencies are significantly improved.

The installation of colored zones increases the driver's awareness of danger by transmitting colors to the eyes, vibrations to the body, and sounds to the ears.
Coloring also helps improve amenities. Moreover,
In the case of ceramic grains that are colored all the way to the core, the color tone will not change even if the surface is scraped by wear.

[Brief explanation of drawings]

FIG. 1 is a perspective view illustrating a marker material in which ceramic grains of the present invention are embedded. FIG. 2 is a perspective view illustrating a sheet-like sign material of the present invention. FIG. 3 is a perspective view showing an example of installation on a road surface. 1... Concrete plate 2... Ceramic grains 11... SBR sheet 12... Epoxy resin 13... Ceramic grains 14... Sheet-shaped body 21... Ceramic grains 22... Band-shaped material 23 ...asphalt surface

Claims (3)

[Claims] (1) A road sign material characterized by being made of ceramic grains colored to the surface layer or core. (2) A road sign material, characterized in that the ceramic grains according to claim (1) are embedded in a cement plate. (3) A road sign material, characterized in that the ceramic particles according to claim (1) are adhered to a sheet. (4) Claims (1), (
2) or the road sign material described in (3).