JPH07138906A - Snow-melting paving material - Google Patents

Abstract

PURPOSE:To discharge snowmelt through a paving material by making the paving material itself water permeable. CONSTITUTION:A snow-melting paving material is constituted from lower and upper paving material layers 3, 8 wherein granular coarse aggregates 4 are fixedly bonded by binders 5 so as to provide gaps 6 between the aggregates 4, and a surface heating element 7 provided between the lower and upper paving material layers 3, 8. Snowmelt is allowed to be discharged downward through the lower paving material layer 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pavement material in a snowfall area, and more particularly to a snow melting pavement material for melting snow accumulated on the pavement material by heat.

[0002]

2. Description of the Related Art In a snowy area, snowfall is an indispensable work because it not only obstructs traffic but also causes slip accidents of people and vehicles. In the past, snow was removed by snow plows on roadways and snow was manually removed on sidewalks.However, when snowfall recently, water is always sprayed on roadways and sidewalks to melt the snow on the surface of the pavement material, and to remove water and snowmelt. Snow melting roads that drain water to gutters are also being implemented in various places. As the snow melting means, water is constantly flowed over the pavement material to melt the snow, or a hot water pipe is embedded in the pavement material and the heat is used to melt the snow.

[0003]

However, on such a snow-melting road, a water film is formed on the surface of the pavement material, and when the person walks or the vehicle runs, the water is splashed up or the pavement material becomes unsteady. There may be water pools, which may obstruct traffic.

Therefore, an object of the present invention is to make the pavement material itself water-permeable so that water generated by snow melting is drained downward through the pavement material in order to improve the above-mentioned conventional drawbacks. That is.

[0005]

The snow melting pavement material of the present invention comprises a pavement material layer in which granular aggregates are fixed so as to have voids between them, and a heat generating means incorporated in the pavement material layer. It is composed of.

In this case, the paving material layer may be composed of resin mortar in which coarse aggregate is bound with synthetic resin so as to have a gap between these coarse aggregates, and the heat generating means is constituted by a surface heating element. The heating surface may be provided so as to be parallel to the surface of the pavement material layer.

[0007]

Since the pavement material is heated by the heating means as described above, the snow falling on the surface of the pavement material is melted by the heat. Since the aggregate of the pavement layer is fixed so as to have voids, a porous finish can be achieved and snow can be melted inside the pavement layer. In addition, the water generated by snow melting is drained downward through the inside of the pavement layer, so a water film may be formed on the surface of the pavement layer, or even if the pavement layer is uneven There is nothing that can be done, and water splashes and water pools can be prevented.

Further, by making the pavement material layer water-permeable in this way, the snowmelt water permeates through the pavement material layer and is discharged downward, so that it does not stop on the heat generating means, so that electrical control is possible. It is possible to use a surface heating element that can be installed at low cost.

[0009]

EXAMPLE An example of a snow melting pavement material according to the present invention will be described below with reference to the drawings. On the base layer 1, an underlayer composed of crushed stone, soil, concrete, asphalt concrete or the like as in the conventional pavement. 2 is provided, and a water-permeable lower pavement material layer 3 is provided on the base layer 2 with a predetermined thickness. This lower pavement material layer 3 is
It is composed of sand, pebbles, or crushed rock, and has a grain size of 0.8-1.
Composed of resin mortar, resin concrete, coarse-grained asphalt concrete, or open-grained asphalt concrete in which 0 mm of coarse aggregate 4 is fixed with binder 5 such as polyurethane resin or epoxy resin so as to have voids 6 between these coarse aggregates 4. Has been done. The void 6 is formed so that a part thereof is connected to the adjacent void 6. On the lower pavement material layer 3, for example, strip-shaped surface heating elements 7 composed of sheet heating elements that generate heat when energized as seen in Japanese Patent Laid-Open No. 3-25881 are arranged at appropriate intervals and have a heating surface. Are provided with the above on. These surface heating elements 7 are arranged so as to extend in the width direction of the road, sidewalk, or promenade. A water-permeable upper pavement material layer 8 is provided on these surface heating elements 7 similarly to the lower pavement material layer 3, and the upper surface of the upper pavement material layer 8 is smoothed to form a road surface 9. . The upper pavement material layer 8 is similar to the lower pavement material layer 3 described above in that the coarse aggregate 4 is used.
It is composed of resin mortar or resin concrete or coarse-grained asphalt concrete or open-grained asphalt concrete that is fixed with a binder 5 so as to have voids 6 between them. A resin mortar that can have voids is desirable. The layer thickness of the upper pavement material layer 8 is smaller than the layer thickness of the lower pavement material layer 3.

In the snow melting pavement material thus constructed, the surface heating element 7 is energized and heated during snowfall to warm the upper pavement material layer 8. As a result, the snow that has fallen on the road surface 9 of the upper pavement material layer 8 is melted into water and flows through the voids 6 to the lower pavement material layer 3. Since the voids 6 are also formed in the lower paving material layer 3, the water further descends and flows to the surface of the underlayer 2. If the underlayer 2 is made water-permeable, water can be absorbed by the substrate layer 1. If the underlayer 2 is made impermeable, a groove or the like is provided on the side of the underlayer 2. Then, the water flowing on the surface of the underlayer 2 may be drained. In any case, since water does not stop near the surface heating element 7, the risk of electric leakage can be eliminated. Further, the surface heating element 7 is inexpensive, and the construction thereof is arranged on the lower pavement material layer 3 at a predetermined interval so that each surface heating element 7 can be installed.
Just connect the to the power supply, and the construction time is short.
Furthermore, since the amount of heat can be adjusted by adjusting the power supply voltage, it is possible to perform control that immediately responds to environmental changes such as fluctuations in outside temperature and wind strength.

In the above-mentioned embodiment, the two layers of the lower pavement material layer 3 and the upper pavement material layer 8 are provided so as to sandwich the surface heating element 7, but it is necessary to provide two layers of the pavement material layer in this way. Alternatively, after the paving material as described above is applied on the underlayer to a predetermined thickness, the surface heating element 7 is installed, and the same paving material may be applied so as to fill the surface heating element 7. . Further, when the wide surface heating element 7 is used, through holes may be provided in the surface heating element 7 at appropriate intervals and the drainage may be performed downward from these through holes. Further, in the above-mentioned embodiment, the surface heating element is used as the heating means, but a hot water pipe may be stretched around.

Explaining a concrete experimental example here, 60 Kg of natural stone having a grain size of 3.0 to 5.0 mm as coarse aggregate
And 10 kg of epoxy resin as binder
Pour into a liter mortar mixer, mix for 2-3 minutes, use as a paving material, spread to a thickness of 90 cm, 90 cm in width and 1.0 cm, and level it. An organic PCT heating element having a width of 15 cm, which is commercially available as "Dielek", is arranged at an interval of 20 cm, and 0.8 cm of the above-mentioned pavement material is further arranged thereon.
Was evenly applied with a metal trowel. As a result, the surface temperature of the paving material was 21 ° C. before energization, whereas
After 0 minutes, the surface temperature rose to 30 ° C. Although 10 liters of water was sprayed, the water was drained downward through the pavement material within 10 seconds, and no water film was formed on the surface of the pavement material.

[0013]

As described above, the snow melting pavement material of the present invention is
It is composed of a pavement material layer in which granular aggregates are fixed so as to have voids between them, and heating means embedded in this pavement material layer, and the pavement material is heated by the heating means. The snow that falls on the surface of the paving material is melted by the heat. Since the pavement material layer has a porous finish, it is possible to melt snow even inside the pavement material layer. In addition, the water generated by snow melting is drained downward through the inside of the pavement layer,
Even if a water film is formed on the surface of the pavement material layer, or if the pavement material layer is uneven, no water pool can be formed, and water splashes and water pools can be prevented.

In this case, as described in claim 2, the pavement material layer may be made of resin mortar in which coarse aggregate is bound with synthetic resin so as to have voids between the coarse aggregates.

Further, since the pavement material layer is water-permeable, the snowmelt water can permeate through the pavement material layer and be discharged downward. Therefore, electrical control is possible as described in claim 3. ,
A surface heating element, which is inexpensive, can be used as the heating means.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view schematically showing a part of an embodiment of the snow melting pavement material of the present invention.

[Explanation of symbols]

 2 Underlayer 3 Lower pavement material layer 4 Coarse aggregate 5 Binder 6 Void 7 Surface heating element 8 Upper pavement material layer

Claims (3)

[Claims] 1. A snow melting pavement material comprising a pavement material layer in which granular aggregates are fixed so as to have voids between them, and a heat generating means incorporated in the pavement material layer. 2. The snowmelt according to claim 1, wherein the paving material layer is made of resin mortar in which coarse aggregate is bound with synthetic resin so as to have voids between the coarse aggregates. Paving material. 3. The heat generating means comprises a surface heating element,
The snow melting pavement material according to claim 1, wherein the heat generating surface is provided in parallel with the surface of the pavement material layer.