JPH1181216A - Snow melting pavement construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve snow melting efficiency and workability by mixing a reinforcing material and a binder mainly made of asphalt into carbon to form an intermediate layer, and heating it by excitation. SOLUTION: A base layer 3 is formed on the ground 1, and an intermediate layer 5 compacted with carbon is formed on it as a heating body by excitation. A surface layer 7 is formed on it by asphalt pavement. Exciting wires 9, 11 are arranged on the intermediate layer 5, and branch wires 13, 15 are connected to the exciting wires 9, 11. A binder mixed with a chemical synthetic rubber material 3-10 wt.% against asphalt is formed. The mixed quantity of the carbon is set to 25-70 wt.%, the mixed quantity of the binder is set to 6-15 wt.%, and a reinforcing material is used for the remainder. The reinforcing material contains No.6 crushed stones 10-30 wt.%, No.7 crushed stones 10-30 wt.%, coarse sand 10-20 wt.%, fine sand 10-20 wt.%, and stone powder 5-15 wt.%. The heating temperature of the intermediate layer 5 is controlled at 60-90 deg.C. This pavement can be executed at a low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow melting pavement method for erasing snow on roads, sidewalks, gardens, etc. by heat generated by electricity.

[0002]

2. Description of the Related Art Conventionally, snow melting devices on roads, gardens, etc.
Water spraying, burying of a heating tube through which a heat medium such as hot water passes, and burying of a heating element by energization are employed. In this case, as the heating element, a plate-shaped heating element (JP-A-62-291883), a linear heating element (JP-A-7-331605), or the like is used.

[0003] As the linear heating element, a nichrome wire or a bundle of carbon fibers coated with an insulating material is used. In the construction, after wiring on a base layer such as a crusher run, pavement is applied on the surface, etc., but it is difficult to accurately and stably install the linear heating element. However, as shown in the above-mentioned publication, a magnet for attracting is attached to the linear heating element, but the work is complicated and the work efficiency is poor. There was a problem that it becomes expensive.

In addition, since heat is radiated at the locations where the linear heating elements are arranged, uniformity of snow removal cannot be obtained, and electric energy is greatly lost. Further, in the case of a bundle of carbon fibers, far-infrared rays promote snow removal, but since this is also partial, there is a problem that the effect of far-infrared rays cannot be expected much.

[0005]

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention not only provides uniformity in snow removal by far-infrared rays, improves snow removal efficiency, but also improves workability in construction. The purpose of the present invention is to provide a snow melting pavement method that is inexpensive in terms of material.

[0006]

Means for Solving the Problems To achieve the above object, the method of the present invention uses an upper subgrade (crusher run C).
-40, Grain-adjusted crushed stone M-40) On the base layer constructed on the crushed stone, the intermediate layer that generates heat by energization is formed, and the surface layer is formed on the intermediate layer. The powdered carbon is mixed with a connecting material mainly composed of asphalt whose kinematic viscosity has been increased by heating, further mixed with a reinforcing material, laid as an intermediate layer on the base layer, and the intermediate layer is energized. It is characterized by generating heat.

[0007] If the asphalt is straight asphalt, it is effective for achieving the object.

[0008] 3 to 10% by weight based on asphalt
By combining the synthetic rubber material of
More effective.

[0009] The reinforcing material is characterized by comprising at least one of pulverized industrial waste plastic material, crushed stone, coarse sand, fine sand and filler.

[0010] The filler is desirably composed of one or more of stone powder and lime.

The amount of carbon to be mixed is desirably 25 to 70% by weight.

The mixing amount of the connecting material is 6 to 15 by weight.
% Is desirable.

Further, if the weight of carbon is 25 to 70%, the connecting material is 6 to 15%, and the balance is reinforcing material, it is effective to achieve the object of the present invention.

The reinforcing material is composed of, by weight, crushed stone No. 7: 10 to 30%, coarse sand: 10 to 20%, fine sand: 10 to 10%.
20%, stone powder: 5 to 15% is desirable as a reinforcing material.

Further, the reinforcing material may be composed of a crushed stone of No. 6 or a crushed industrial waste plastic container (0 to 13 m
m): 10-30%, No. 7 crushed stone: 10-30%, coarse sand:
10-20%, Fine sand: 10-20%, Stone powder: 5-15%
If so, it is more effective.

The object of the present invention can be effectively achieved by controlling the heat generation temperature of the intermediate layer to 60 to 90 ° C.

According to the above construction, the intermediate layer is uniformly embedded in the range of construction, and the materials constituting the intermediate layer are evenly mixed. Since the main body is used, the snow is uniformly and efficiently eliminated. In addition, the configuration for energization is easy, there is no need for holding tools, and construction is not much different from ordinary pavement,
Machine construction with roller fisher etc. is possible,
Good work efficiency. In addition, straight asphalt can be used as a connecting material for the intermediate layer, and powdered and granular carbon (particle size of about 3 to 0.3 mm) obtained by steaming and grinding waste such as paper and wood can be used for carbon. In addition, construction becomes cheap.

In order to ensure conductivity, it is necessary that carbon is in contact, and this is done by making carbon 25-70%. If the carbon content is less than 25%, no heat is generated to achieve the object of the present invention, and if it exceeds 70%, problems of strength, moldability, and cost occur. On the other hand, as the connecting material, for example, regarding the amount of straight asphalt,
If it is less than 6%, its function will be insufficient, and if it exceeds 15%, it will be difficult to harden and trouble will occur in machine construction. This ratio is a relationship between carbon and straight asphalt. In order to facilitate construction and obtain the required strength (Marshall stability test of 500 kg · F or more), solid materials such as crushed stone and sand are used. May be mixed as a reinforcing material within a range that does not hinder conductivity.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION As massive or powdery carbon, charcoal and coal are suitable for use because they are inexpensive.
In particular, carbon obtained by steaming wastes such as wood chips and old magazines is suitable for environmental protection measures that are friendly to the earth under the current situation where it is difficult to recycle these recycled papers. In addition, carbon black obtained by treating petroleum products at a high temperature of about 1100 ° C. is suitable for use because of its stable conductivity, but it is costly, and therefore it is auxiliary even when used. desirable.

There are two types of asphalts, one calculated naturally and one obtained as a distillation residue at the time of petroleum refining. The former is called natural asphalt, and the latter is called petroleum asphalt (straight asphalt). The components of asphalt are divided into an oily portion (petrolene) that is soluble in petroleum ether and a solid portion that is not soluble (asphalten). Straight asphalt has a high content of petrolene and is highly sticky.

Even if the carbon is a powder, if the connecting material is straight asphalt, the connecting function is sufficiently exhibited by its kinematic viscosity. As for the temperature at which the kinematic viscosity is imparted, the mixing temperature is set to 1 as in the case of ordinary asphalt pavement.
The temperature may be about 37 to 153 ° C., but may be about 180 ° C., for example, in order to increase the degree of mixing. However, when compacting, the temperature is set to about 137 to 141 ° C., as in the case of ordinary asphalt pavement.

When pressed, the connecting material hardens and shrinks, and the carbon powder comes into contact, thereby obtaining conductivity. If the degree of pressurization is small, conductivity cannot be obtained. Ensuring conductivity is affected by the type and properties of the carbon powder, the degree of pressurization, and the like. When carbon fibers are mixed, strength and conductivity are improved.

It is not contrary to the spirit of the present invention to add a conductive filler in an auxiliary manner in order to enhance the conductivity. As the conductive filler, metal powders such as copper and nickel, powders of metal oxides such as zinc oxide, indium oxide and tin oxide, carbon black and graphite can be used.

[0024]

As described above, according to the snow melting pavement method of the present invention, the construction area is uniformly heated, and the intermediate layer is a lump containing carbon. Is uniform, snow removal is averaged and the snow removal efficiency is good, so that not only can snow removal be performed conveniently, but also energy saving, workability is good, and straight asphalt is used as the connecting material. Since it is used, carbon made of waste material can be used, and there is an excellent effect that the construction can be performed easily and at a low cost.

[0025]

FIG. 1 is a sectional view of a pavement embodying the present invention, and FIG. 2 is a wiring diagram of electrodes. Cross section, ground 1
A flexible base layer 3 compacted with crushed stones or cobblestones is formed thereon, and an intermediate layer 5 as a heating element by energizing carbon or the like is formed thereon, and ordinary asphalt pavement is formed thereon. Is applied to the surface layer 7. In order to conduct electricity, the conducting wires 9 and 11 as both electrodes are arranged in parallel in the intermediate layer 5, and the conducting wires 9 and 11 are connected to branch lines 13 and 15 extending to the other side. Branch lines 13 and 15 are alternately formed.

In the intermediate layer 5, since the branch lines 13 and 15 of the conducting wires 9 and 11 are alternately arranged, not only the wiring is stabilized, but also the conductivity is improved. Therefore, the strength is also improved by this, and even if the middle layer 5 is cracked, the conductivity is secured. Any material may be used for these wires as long as they have conductivity, but copper wires are most suitable. Note that branch line 1
The objects 3 and 15 are not always necessary, and the object of the present invention can be achieved only by the conducting wires 9 and 11.

As the carbon of the material of the intermediate layer 5, paper and wood made of steamed charcoal were used almost in half. Since the original form remains as it is, it was pulverized by a mixer and the cut powder was used as a raw material. At the site, it was kneaded with straight asphalt, a reinforcing material and the like, and in this case, straight asphalt heated to about 150 ° C. was used. The characteristics of the chips are as follows.

[0028]

The composition and mixing amount of the material constituting the intermediate layer 5 are as follows. No. 7 crushed stone 20% Coarse sand 10% Fine sand 15% Stone powder (filler) 10% Carbon (carbon) 30% Straight asphalt 15%

In the construction of the intermediate layer 5, first, the half layer is leveled. Next, the conducting wires 9 and 11 with the branch lines 13 and 15 are arranged at predetermined positions thereon, and a thermostat is partially provided. Then, the thermostat is lightly pressed from above to temporarily fix the wires. Further, the remaining conditioning material was discharged from the mixer and leveled, and then pressed with a roller fisher.
However, the construction of the intermediate layer 5 is not limited to this embodiment, and any method can be used as long as the object of the present invention can be achieved.

Regarding the thickness of the construction, the base layer 3 is about 20 m
m, the intermediate layer 5 was about 30 mm, and the surface layer 7 was about 20 mm. Note that an insulating sheet such as rubber may be interposed between the base layer 3 and the intermediate layer 5.

Regarding the construction cost, in the case of watering, the cost is 20,000 yen / m ² , while the cost is 3,000 yen / m ^2.
It became extremely cheap at 0 to 5,000 yen / m ² . Also,
When the power was turned on during the snowfall, the temperature of the pavement was raised to an average temperature over the entire area, so that the snow was evenly removed and the snow was efficiently removed by the influence of far-infrared rays.
The temperature of the intermediate layer 5 was set to 80 ° C., and the low voltage was passed through the electric wires 9 and 11 to maintain this value.

[Brief description of the drawings]

FIG. 1 is a perspective sectional view of a pavement embodying the present invention.

FIG. 2 is a wiring diagram of electrodes.

[Explanation of symbols]

 3 Base layer 5 Intermediate layer 7 Surface layer 9, 11 Conducting wire as electrode 13, 15 Branch line

Claims (11)

[Claims] In a road pavement construction method, an intermediate layer that generates heat by energization is formed on a base layer that is constructed on an upper subbase, and a surface layer is formed on the intermediate layer. A lump or powdery carbon is mixed with a connecting material mainly composed of asphalt whose kinematic viscosity has been increased by heating, further mixed with a reinforcing material, and laid on the base layer as an intermediate layer. A snow melting pavement method characterized by generating heat when energized. 2. The snow melting pavement method according to claim 1, wherein the asphalt is straight asphalt. 3. The weight of the asphalt is 3 to 10%.
The snow melting pavement method according to claim 1 or 2, wherein the connecting material is constituted by mixing a chemically synthesized rubber material of 5%. 4. The snow melting pavement method according to claim 1, wherein the reinforcing material comprises at least one of crushed industrial waste plastic material, crushed stone, coarse sand, fine sand and filler. . 5. The snow melting pavement method according to claim 4, wherein the filler comprises at least one of stone powder and lime. 6. The snow melting pavement method according to claim 1, wherein the amount of carbon mixed is 25 to 70% by weight. 7. The snow melting pavement method according to claim 1, wherein the mixing amount of the connecting material is 6 to 15% by weight. 8. Carbon by weight: 25-70%, connecting material 6
The snow melting pavement method according to claim 1, 2, 3, 4, 5, 6, or 7, wherein the remaining amount is up to 15%. 9. The composition of the reinforcing material is the following:
0-30%, coarse sand: 10-20%, fine sand: 10-20
%, Stone powder: 5 to 15%, the snow melting pavement method according to claim 1, 2, 3, 4, 5, 6, 7, or 8. 10. The reinforcing material is composed of a crushed stone (6) or a crushed industrial waste plastic container (0 to 13 m) by weight.
m): 10-30%, No. 7 crushed stone: 10-30%, coarse sand:
10-20%, Fine sand: 10-20%, Stone powder: 5-15%
4. The method according to claim 1, wherein
6. The snow melting pavement method according to 6, 7, or 8. 11. The method according to claim 1, wherein the heating temperature of the intermediate layer is controlled at 60 to 90 ° C.
The snow melting pavement method according to 6, 7, 8 or 9.