JP2775347B2 - Asphalt patterning method and apparatus - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method and an apparatus for forming a predetermined pattern on a newly extended asphalt surface, and in particular, a brick or pebble by pressing a flexible grid-like template on the asphalt surface. And a method and apparatus for providing the appearance of bonded pavement stones and the like.

(Background Art) When building roads, sidewalks, and roadways, three types of materials are usually used.
That is, asphalt, concrete or paving stone is used. Paving stones that are laid together are generally considered to be more aesthetically pleasing than non-decorated asphalt or concrete, but the construction costs are relatively high.

Various methods and devices for applying patterns to the surface of materials such as concrete are well known. For example, U.S. Pat. Nos. 3,832,079 and 3,910,711 to Moorehead, Sep. 27, 1974 and Oct. 7, 1975, disclose a method and apparatus for patterning unhardened concrete. I have. The methods disclosed in these U.S. patents use a shaft mounted pattern roller having vanes, which are pressed against uncured concrete to give the appearance of blocks, bricks, pebbles and the like. A plastic film is disposed between the blades of the roller and the concrete surface and functions as a peeling member to prevent bonding of the blades or occurrence of an undesirable round hole. Japanese Patent Application Laid-Open No. 2-61205 also discloses a configuration in which a mold is supported on a shaft-loaded pattern roller or belt operable in the width direction on a semi-dried concrete surface. There are various problems with this type of shaft-loaded pattern roller. This type of pattern roller is difficult to operate favorably because of its large size and weight, and tends to sink into newly laid concrete.
When such a pattern roller is used for hot asphalt, it tends to sink further deeper, and in particular, the mold cannot be easily removed from the roller.
Cleaning is also becoming difficult. Further, since the width of the pattern roller is constant, it is not suitable for a pattern pressing operation on a large surface, and it is extremely difficult to perform a uniform pattern pressing along each transverse edge.

In another embodiment of the invention according to the above-mentioned Japanese patent, the mold is configured to be placed directly on the concrete surface to be patterned by using a crane, and the concrete surface is set in an unhardened state by vibration. Pressed.
In this embodiment, too, the size of the mold is constant, and it has not been possible to provide a device for patterning a large surface area by appropriately adopting various molds. US Pat. 4th, 10th
No. 5,354 discloses a configuration using a wheel-shaped forming tool that can be pattern pressed onto plastic concrete to be cast. In this case, concrete impregnated blades are mounted on the outer surfaces of the wheels and frame in a grid form. A group of wheel-forming tools for pattern pressing are interconnected and pattern pressed against a large area concrete surface. As with the shaft-mounted pattern roller described above, the device according to this patent is large, heavy, and difficult to move when employed with hot asphalt.

Other known molds for imprinting against semi-hardened concrete were also largely unsuitable for imprinting on asphalt surfaces due to the nature of the substrate. The newly extended asphalt is extremely hot (typically 275-300 ° F). In addition, as one of the properties of asphalt, it is necessary to compress the asphalt at the beginning of paving, and if the asphalt is not compressed, it becomes particulate and is not useful as a paving material. Therefore, the only practical configuration for impressing the pattern on asphalt is to use it together with a compression device such as a drum-shaped roller or a vibrating tamper. Thus, it is required that a mold suitable for asphalt pattern pressing be durable at high temperatures or high pressures and not cause undesired bending or deformation. There is a problem that all of these conditions cannot be satisfied with the well-known concrete pressing mold.

Accordingly, it has been desired to provide a method or apparatus for patterning the asphalt surface to provide an aesthetically pleasing appearance, such as pebbles or continuous paving stones.

(Disclosure of the Invention) According to the present invention, (a) a step of providing a flexible template formed of a single push or a plurality of detachably connectable mold modules for applying a predetermined pattern to an asphalt surface; (B) a step of arranging the template on the asphalt surface; (c) a step of press-fitting the template into the asphalt surface using a compression device separate from the template to form a predetermined pattern on the asphalt surface; On the other hand, there is provided a method for texturing an asphalt surface, comprising the steps of: moving a compression device; and (e) lifting a template against the asphalt surface.

After the asphalt is initially extended and flattened, it is preferable to press-fit the template into the asphalt surface using a drum roller.

The patterning method further includes the step of applying a release material to one of the asphalt surface or the template to minimize adhesion between the asphalt surface and the template. The release material is preferably an oil-based fluid applied to the template or a powder cement applied to the asphalt surface prior to the patterning step.

The release material for the powder cement includes a coloring material for coloring the asphalt surface. In the configuration using powdered cement as the release material, a step of adding water to the powdered cement after lifting the template from the asphalt surface is further included, whereby the colored cement slurry is scattered over the entire asphalt surface. And is naturally cured.

In another embodiment of the invention, a thin uncolored surface cement layer is applied to the asphalt surface after the texturing step. In this case, the surface cement layer is treated in the next step with a colored coating such as an epoxy reinforced acrylic emulsion.

Preferably, each template module is configured as an open frame structure consisting of a continuous longitudinal member such as a longitudinal cable or rope. And according to a preferred embodiment, the template modules are loosely connected by a plurality of connectors and a plurality of tubular sleeves in a desired pattern so that the connectors are spaced apart along the outer perimeter of each module and externally. The sleeve receives a stud of a separate template module when the modules are aligned adjacent to each other.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings show an embodiment according to the invention,
The technical idea and technical scope of the present invention are not limited only to this embodiment.

FIG. 1 is a simplified side view showing a step of pressing a flexible mold onto a newly extended asphalt surface using a double drum roller in the asphalt patterning method according to the present invention, and FIG. 2 is a view from the pressed asphalt surface. FIG.
FIG. 3 is a partial plan view of the mold of FIG. 1, and FIG. 4 is a partially enlarged exploded plan view showing a step of connecting between the mold modules of FIG.

BEST MODE FOR CARRYING OUT THE INVENTION The present application relates to a method and an apparatus for texturing a newly extended surface. The asphalt described below includes not only asphalt alone but also a mixture of crushed stones such as sand or pebbles and asphalt tar in a broad sense.

In the method of the present invention, a mold pattern made of a heat-resistant and pressure-resistant material is pressed against asphalt. Referring to FIG. 1, the mold is a relatively narrow grid.
It is 10. The grid 10 is initially newly extended and rests on the still hot and flexible asphalt surface 12. Grid 10
Is then progressively pressed into the asphalt surface 12 using, for example, a double drum roller 14, a diaphragm tamper, or other surface compression device. After this compression step, the grid 10 is manually lifted from the asphalt surface 12 (see FIG. 2), and the pressed asphalt is further hardened. By applying a pressing pattern to the ordinary asphalt in this way, it is possible to give the appearance of a continuous paving stone, pebble, brick or other aesthetically pleasing material.

The structure of the grid 10 is shown in detail in FIGS. The grid 10 is preferably composed of a plurality of "type modules", i.e., a grid section 16;
Is matched to the size and shape of the asphalt surface 12 to be loosely connected and patterned as described below. Each grid section 16 comprises a plurality of flexible cables connected in a desired pattern. Each cable may be constructed of braided steel, wire, rope, or other suitably flexible material that does not bend or deform at high pressures and temperatures. The diameter of the grid cable will depend on the desired pressing depth or type of pattern, but cables between 0.25 inches and 2 inches in diameter are suitable for most applications. FIG.
In the grid pattern shown in FIG. 4, the asphalt surface 12 is configured to have a pebble or brick pattern.

Each grid section 16 is provided with a cylindrical stud 18 projecting outwardly from the top and bottom edges and spaced apart. As shown in FIG. 4, the cylindrical studs of adjacent grid sections 16 are aligned and loosely connected by a tubular sleeve 20. Similarly, the side edges of each grid section 16 are provided with spaced apart studs 22, which are loosely connected to the corresponding studs 22 of the adjacent grid section 16 by a substantially H-shaped connector 24. Is done. As shown in FIG. 4, each H-shaped connector 24 comprises a pair of parallel spaced apart tubular sleeves 26 connected by a length of flexible cable. Accordingly, the grid section 16 is provided so as to be easily connectable without using a tool and without impairing the entire pattern formed by the grid 10.

When not used, each grid section 16 is wound into a compact form as shown in FIG. 2 (see FIG. 2) and stored or transported.

In operation, the grid 10 is initially assembled from a plurality of grid sections 16 as described above, unwound, stretched, and laid flat on the asphalted surface 12. At this time, the asphalt surface 12 is extremely hot (usually 275
~ 300 ° F) in a plastic or semi-plastic state. According to one embodiment of the present invention, a release material based on oil is applied to the grid 10 to minimize the adhesion between the grid cable and the hot asphalt surface 12. For this reason, after the grid 10 is pressed into the asphalt surface 12, the grid 10 can be easily taken out.
According to another embodiment of the present invention, the grid 10 may be coated with Teflon (registered trademark) or an equivalent non-adhesive material.

According to yet another embodiment of the present invention, dry powdered cement is used as a release material, and adhesion between the grid 10 and the asphalt surface 12 can be minimized. It is preferable that the powder cement is spread on a newly extended asphalt surface, and then the above-described press-fitting step is performed. Colorants such as iron oxide powder or synthetic colorants can be mixed into the powder cement. After the grid 10 is lifted from the asphalt surface 12 following the press-in process (see FIG. 2), a small amount of water is spread on the asphalt surface 12, and accordingly, a colored cement slurry is sprayed over the asphalt surface 12 and naturally spread. Is cured. Consequently, the black asphalt surface is usually covered with colored concrete, and the desired brick, mortar or pebble-like pattern is obtained. The cement coating also functions as a protective layer, thus reducing the heat absorption of the asphalt.

After press-fitting process, a protective layer mainly composed of other acrylic, epoxy or latex is placed on the asphalt surface 12 to seal the asphalt surface to which the pressing pattern is attached, thereby enhancing the effect of simulating bricks or pebbles. Can be

According to one embodiment of the present invention which has been found to be effective, a thin non-colored cement layer is formed on the asphalt surface 12 after the pattern pressing step. This cement layer is pressed into the asphalt surface 12 to fill small gaps or holes, and the asphalt surface is further integrated. The cement layer is then coated with a colored sealant such as an acrylic emulsion reinforced with epoxy. This sealant can be colored according to customer requirements.

From the above description, it will be apparent to one skilled in the art that various design changes that are within the spirit and scope of the present invention are possible when practicing the present invention. Thus, the scope of the present invention may be constituted by the entities defined by the appended claims.

Continuation of the front page (72) Inventor Zaseibida, Norman Jerry, Canada Buoy 0H 2A0 Breitishville Columbia, West Bank, Compartment 53, Site 10, Earl. R. Sharp 1 (56) References JP-A-2-61205 (JP, A) DE 2918860 (DE, A1) (58) Fields investigated (Int. Cl. ⁶ , DB name) E01C 19/43

Claims (26)

(57) [Claims] (A) A flexible template (10) composed of one or more detachable and connectable mold modules (16) having a predetermined pattern on an asphalt surface (12) is provided. (B) placing the template (10) on the asphalt surface (12); and (c) placing the template (10) on the asphalt surface (12) using a compression device separate from the template (10). Press-fitting to form a predetermined pattern on the asphalt surface (12), (d) moving the compression device relative to the template (10), and (e) lifting the template (10) on the asphalt surface (12) A method for patterning an asphalt surface (12), comprising: 2. The method according to claim 1, wherein the template (10) is pressed against the asphalt surface (12) immediately after the asphalt surface (12) is initially extended. 3. A process for attaching a release material to one of the asphalt surface (12) and the template (10) to minimize the adhesion between the asphalt surface (12) and the template (10). The patterning method according to claim 1, comprising: 4. The patterning method according to claim 1, wherein a drum roller (14) is used for the compression device. 5. The method of claim 1, wherein each of the one or more mold modules (16) is configured as an open frame that can be interconnected. 6. The patterning method according to claim 3, wherein powdery cement applied to the asphalt surface (12) is used as the release material. 7. The patterning method according to claim 6, wherein a coloring material for coloring the asphalt surface (12) is used for the powder cement. 8. A method according to claim 7, further comprising the step of raising the template (10) from the asphalt surface (12) and then applying water to the powdered cement. 9. The method of claim 1 further comprising the step of providing a thin cement layer on the asphalt surface (12). 10. The method according to claim 9, further comprising the step of providing a colored coating on the cement layer. 11. A method according to claim 1, further comprising the step of providing a colored coating on the asphalt surface (12). 12. The patterning method according to claim 10, wherein the coating comprises an epoxy-reinforced acrylic emulsion. 13. The patterning method according to claim 11, wherein an epoxy-reinforced acrylic emulsion is used for the coating. 14. An asphalt surface (12) comprising a plurality of mold modules (16) connectable to each other, wherein each mold module (16) is an open frame having a longitudinal member connected to each other. Flexible template (10) for attaching a predetermined pattern to (). 15. The template (10) according to claim 14, further comprising means for loosely connecting the mold module (16). 16. A connecting device comprising a plurality of studs (1) spaced apart from the outer peripheral portion of the (a) type module (16) and projecting outward.
8) and (b) separate mold modules (16) having open ends when the mold modules (16) are aligned adjacent to each other.
16. The template (10) of claim 15, comprising a plurality of tubular sleeves (20) for receiving said studs. 17. The template (10) according to claim 16, wherein the tubular sleeve (20) is connected together in a substantially parallel relationship via an elongated flexible cable. 18. The template (10) of claim 14, wherein the elongated member comprises a plurality of long steel cables of substantially constant diameter. 19. The template (10) according to claim 14, wherein the elongate member is a rope. 20. The template (10) of claim 14, wherein the elongate member is a wire. 21. The template (10) of claim 18, wherein the diameter of the cable is between 0.25 and 2 inches. 22. The method of claim 5, wherein the member to be connected comprises a plurality of steel cables of substantially constant diameter. 23. (a) providing a template (10) having a predetermined pattern on an asphalt surface (12);
(B) placing the template (10) on the asphalt surface (12); and (c) pressing the template (10) into the asphalt surface (12) using a compression device separate from the template (10); Applying a predetermined pattern to the asphalt surface (12); (d) moving the compression device to the mold module (16); and (e) elevating the mold module (16) to the asphalt surface (12). And (f) applying a colored cement coating to the patterned asphalt surface (12). 24. The method of claim 1, wherein the coating comprises a thin colored cement layer. 25. The method of claim 1, wherein the coating is formed from an acrylic polymer. 26. A template (10) having a number of mold modules (16) separated from one another on an asphalt surface (12).
2. The patterning method according to claim 1, wherein the patterns are arranged so as to form a predetermined pattern before press-fitting.