JP2640852B2 - All-weather elastic pavement layer and pavement method - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to an all-weather elastic pavement layer and a method of paving the same, and more particularly to a pavement layer and a pavement layer used for a track or a tennis court. It is directed to the pavement method.

(Prior Art) Conventionally, as a structure of an elastic pavement layer used for a competition track or a tennis court, for example, as shown in FIG.
On the eleventh surface, a primer 12 treatment is applied as a base treatment, and thereafter, a liquid polyurethane is divided into a plurality of times and overpainted to form an elastic pavement layer 13, and thereafter, the elastic pavement layer 13 is formed.
Had been subjected to a topping 14 treatment for the purpose of surface treatment for makeup or non-slip.

(Problems to be Solved by the Invention) The conventional elastic pavement layer may be formed by pouring a required amount of liquid polyurethane at one time as a forming step, but in this case, the foam may be partially foamed. There was an adverse effect such as the appearance of blisters on the surface and uneven hardness in some areas. In order to eliminate this adverse effect, as described above, the liquid polyurethane was applied in multiple coats to form an elastic pavement layer. But,
This forming step requires a lot of work in terms of workability and also has poor leveling performance, and the recoating operation requires a high degree of skill. When the cracks occur in the elastic pavement layer with a long-term use, the cracks reach the bottom of the elastic pavement layer, and the repair thereof requires considerable trouble. Forming the entire elastic pavement layer with an expensive polyurethane resin has never been economically preferable.

The present invention cracks generated from the surface side of the elastic pavement layer, prevents its expansion, economically uses expensive polyurethane resin constituting the main part of the elastic pavement layer, and further reduces the elastic force of the elastic pavement layer. It is an object of the present invention to provide an easily adjustable all-weather elastic pavement layer that can be appropriately adapted to the purpose of use and a method of paving the all-weather elastic pavement layer that can improve the leveling performance in the pavement process.

(Means for Solving the Problems) In order to achieve this object, the present invention has the following configuration. That is, the all-weather elastic pavement layer according to the embodiment of the present invention is laid on the base surface via a primer, and the main constituent part of the elastic pavement layer is formed of a polyurethane layer, and the rubber composition is contained in the polyurethane layer. A composite sheet mainly composed of objects is embedded. In the composite sheet, a woven or nonwoven fabric is adhered to at least one of the upper and lower surfaces of the rubber composition sheet, and a group of through holes are scattered throughout the entire surface of the composite sheet. In addition, the composite sheet embedded in the polyurethane layer has a structure in which a part of the polyurethane is filled in the through-hole group.

Further, in the paving method of the all-weather elastic pavement layer according to the present invention, during the process of applying the liquid polyurethane through the primer on the base surface, the sheet-shaped rubber composition is woven on at least one of the upper and lower surfaces of the main body. Alternatively, a composite sheet to which a nonwoven fabric is adhered is interposed and laid.

EXAMPLES Next, specific examples of the all-weather elastic pavement layer and the pavement method for the same pavement layer according to the present invention will be described.

FIG. 1 is a cross-sectional view of a part of a folding track in which an elastic pavement layer is applied to a competition track. One surface of a base forming a competition track is treated with a primer 2, and a topping 4 is provided on one base. An elastic pavement layer 3 applied to the surface is laid.

In the elastic pavement layer 3, a composite sheet 6 in which a sheet-like rubber composition 7 is upholstered on at least one surface is buried in the polyurethane layer 5 as a main portion over substantially the entire surface. The rubber composition 7 is a rubber material such as an unvulcanized rubber, an unvulcanized rubber, a rubberized asphalt, a vulcanized rubber, and a filler such as a softener (oil), an inorganic filler (carbon), asphalt, and a rubber chip. By changing the composition, the cushioning properties of the sheet-like rubber composition 7 can be appropriately returned, and the cushioning effect of the entire elastic pavement layer 3 can be easily adjusted. it can.

A nonwoven fabric or woven fabric 8,8 made of polyester, polypropylene, nylon, glass fiber, or the like is adhered to both upper and lower surfaces or at least one of the upper and lower surfaces of the sheet-shaped rubber composition 7, thereby forming the composite sheet 6.

When the composite sheet 6 is buried in the polyurethane layer 5, a part of the polyurethane enters the woven or nonwoven fabric 8, and the anchor effect of the fold causes a strong bond between the polyurethane layer 5 and the composite sheet 6. Is achieved. From the viewpoint of obtaining the anchor effect, it is preferable to use a nonwoven fabric having a large number of fibers serving as an anchor.

Further, in the composite sheet 6, a group of through-holes 9 extending in the thickness direction of the sheet 6 are scattered throughout the entire surface of the sheet, and more specifically, the diameter of the through-hole 9 is 5 to 50 mm, When the composite sheet 6 is embedded in the polyurethane layer 5 when the composite sheet 6 is embedded in the polyurethane layer 5, a part of the polyurethane is filled in the through holes 9.
The polyurethane layers arranged on both the upper and lower surfaces are partially and integrally integrated, and together with the anchor effect, a strong bond without separation of the polyurethane layer 5 and the composite sheet 6 is realized.

The thickness of the entire polyurethane layer 5 is appropriately selected within a range of 7 to 20 mm, and the thickness of the composite sheet 6 is appropriately selected within a range of 2 to 8 mm.

In the elastic pavement layer 3 illustrated in FIG. 1, first, after the surface of the base 1 is treated with the primer 2, a liquid polyurethane containing a curing agent is applied, and a composite sheet 6 is laid thereon.
After accurate leveling is ensured, a liquid polyurethane containing a curing agent is applied again on the composite sheet 6 so that a part of the liquid polyurethane is formed in the through holes 9 of the composite sheet 6.
The polyurethane layers filled in the inside and thus formed in layers on the lower side and the upper side of the composite sheet 6 are integrally connected to each other vertically through the through holes of the composite sheet. After the upper polyurethane layer is formed, a group of granular polyurethane pieces is sprayed on the entire surface of the polyurethane layer to form the topping 4.

FIG. 2 is a view corresponding to FIG. 1 showing another embodiment, in which a composite sheet 6 which constitutes a part of the elastic pavement layer 3 and is embedded in the polyurethane layer 5 which is the main part is formed of the pavement layer 3. It is characterized in that it is buried in the lowermost surface, and that a woven or nonwoven fabric 8 is necessarily attached to the lower surface of the folded composite sheet 6.

With the above structure, the steam and the expanded air generated from the base material 1 are degassed by using the woven or nonwoven fabric 8 located on the lowermost surface side of the composite sheet 6 as a ventilation path with the rise in temperature. Can be suppressed from appearing on the surface of the swelling. When the elastic pavement layer 3 is employed, the polyurethane layer 5 constituting a part of the pavement layer 3 is used.
In order to improve the adhesive force between the base sheet 1 and the base 1 via the primer 2, the opening ratio of the through holes 9 of the composite sheet 6 needs to be relatively high.

In the elastic pavement layer 3 exemplified in FIG. 2, the surface of the base 1 is first treated with the primer 2, and then a composite sheet 6 with a cloth upholstered on the lower surface is laid thereon. After the application and the formation of the polyurethane layer, a work process of spraying a group of granular polyurethane pieces is employed.

Next, a more specific construction example of the all-weather elastic pavement layer illustrated in FIG. 1 will be disclosed. 3. Composite sheet (Non-woven fabric stuck on both upper and lower sides of sheet rubber asphalt) As rubber asphalt: As non-woven fabric: Polyester non-woven fabric of 50 g / m ² Perforation pitch 50 mm Perforation diameter 20 mm or more
mm, with a topping of 1.5 mm, a urethane layer at the top of the composite sheet of 6.5 mm, a composite sheet of 3.0 mm, and a urethane layer of 2.0 mm at the bottom of the composite sheet.

(Effect of the Invention) The above-mentioned all-weather elastic pavement layer can prevent cracks generated on the surface side, but its expansion is prevented at the composite sheet portion due to the presence of the composite sheet embedded in the pavement layer, and tough for a long time. Can be maintained.

Further, a nonwoven fabric or a woven fabric is stuck on the sheet surface of the composite sheet in a layered manner, whereby an anchor effect with the polyurethane layer which is the main part of the pavement layer is achieved, and a through-hole group formed on the entire surface of the composite sheet is formed. Bonding and integration of the composite sheet and the polyurethane layer due to penetration of a part of the polyurethane layer into the pavement layer is strengthened, and as a result, it greatly contributes to toughening of the entire pavement layer.

In addition, by appropriately changing the composition of the rubber composition constituting the composite sheet, the elasticity of the elastic pavement layer can be appropriately changed, and the adjustment of the cushioning effect of the elastic pavement layer can be easily realized. it can.

Furthermore, since this composite sheet is embedded in the pavement layer with a considerably large volume ratio, the capacity of expensive polyurethane is reduced correspondingly, which contributes to the cost reduction of the elastic pavement layer.

Further, in the present invention, by arranging the composite sheet in the process of the pavement work, the number of times of repeatedly applying the liquid polyurethane repeatedly as in the conventional pavement work can be omitted widely. It has a great merit in terms of work efficiency, and it is very easy to secure the leveling of the pavement layer by using a composite sheet with leveling performance by interposing a composite sheet during pavement work. Becomes

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a part of an athletic track section in which an elastic pavement layer according to the present invention is laid, FIG. 2 is a view corresponding to FIG. 1 showing another embodiment, and FIG. FIG. 4 is a view corresponding to FIG. 1 of a folding using a conventional elastic pavement layer. 3: Elastic pavement layer 5: Polyurethane layer 6: Composite sheet 7: Rubber composition 8: Non-woven fabric or woven fabric 9: Perforation

Claims (6)

(57) [Claims] An elastic pavement layer laid on a base surface via a primer, wherein at least one surface of the rubber is made of a polyurethane-based layer in which through holes are scattered throughout the entire surface. An all-weather elastic pavement layer comprising a composite sheet mainly composed of a composition, wherein polyurethane is filled in the through-hole and embedded. 2. The all-weather elastic pavement layer according to claim 1, wherein the composite sheet has a structure in which a woven fabric or a nonwoven fabric is adhered to at least one of the upper and lower surfaces of a sheet mainly composed of a rubber composition. 3. The all-weather elastic pavement layer according to claim 1, wherein the composite sheet is buried in the lowermost portion of the elastic pavement layer, and a woven or nonwoven fabric is stuck to the lower surface of the composite sheet. 4. The rubber composition constituting a part of the composite sheet includes, in addition to a main rubber material, Alfalt, rubber chips,
The all-weather elastic pavement layer according to any one of claims 1 to 3, wherein the inorganic filler and the softener are appropriately mixed in different amounts. 5. The undercoating surface is treated with a primer, and then a liquid polyurethane is applied to a predetermined thickness to form a lower polyurethane layer. Then, the lower polyurethane layer is formed on at least one of the upper and lower surfaces of the sheet rubber composition. A pavement method for an all-weather elastic pavement layer in which a woven or non-woven fabric is adhered, and a composite sheet having a group of through holes scattered and perforated over the entire surface is laid, and the sheet surface is coated with liquid polyurethane. 6. After treating the base surface with a primer, a woven or non-woven fabric is attached to the upper and lower, at least the lower surface, of the sheet-like rubber composition, and through holes are scattered and formed over the entire surface. A pavement method for an all-weather elastic pavement layer in which a composite sheet is laid, and the sheet surface is again coated with liquid polyurethane.