JPH0813414A - Method of repairing asphalt pavement - Google Patents

Abstract

PURPOSE:To make it possible to repair a large scale of damage immediately in a site without peeling off an asphalt pavement in a short period of time even in a heavy traffic area by mounting a dielectric heater and an asphalt paving material on a truck, moving the truck to the repairing site, and heating an asphalt composite material with the dielectric heater in the repairing site to repair. CONSTITUTION:A dielectric heater 2 and a generator 3 are provided to a truck in full consideration for exhaust of an engine of the generator 3, and in the case a power supply of the truck 1 is used, an AC-AC converter and a voltage regulator are arranged. The asphalt composite material is subdivided into 1-10kg in advance, and they are wrapped with a heat resisting packing material so that they are not melted even if they are heated with the dielectric heater 2. In consideration of expansion caused by heating, heat resisting vent packing is used inward, an enclosed packing is used as an outside packing, and the outside packing is removed in the case of heating and is heated. In addition, an anti-oxidant gas is filled in a packing state, and the oxidation of the asphalt composite material is prevented for a long period of time. A generating material can be utilized by eliminating variations with dielectric heating of the asphalt composite material. Emulsion is subdivided and stored into containers with the soft and straw-like front end.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road surface repair technique for asphalt pavement, and to a method for easily repairing small-scale pavement surface damage on site.

[0002]

2. Description of the Related Art Asphalt pavement widely used for roads, parking lots, plazas, etc.
Not only is the passage of the vehicle dangerous, as the pavement surface may be depressed or peeled off due to defects in the pavement ground, destruction by the vehicle, etc.
If left unattended, the damaged part of the pavement may expand. Therefore, in preparation for such a situation, a local government or group in charge of maintenance of each road or a private company entrusted by these will periodically patrol the road to find and repair damaged parts of the pavement. There is.

[0003] In repairing this damaged portion, for small-scale damage on a general road, conventionally, an emergency repair is carried out with a repair mixture called as a room temperature mixture in which asphalt and an additive are mixed in the damaged portion, and the repair is performed at a normal temperature later. The material was removed, the emulsion was applied, and then the mixture was filled with a heated mixture and pressed with a trowel to finish the repair. In addition, a repair material of a type that mixes and cures two types of materials is used in highways and the like, but it is expensive and unsuitable for general roads.

On the other hand, looking at the asphalt mixture,
The asphalt mixture that has been peeled off due to road repair work etc. is roughly classified and used as landfill mainly for landfill,
Some of them are recycled and used again for asphalt pavement. Of these, recycling can be said to be highly recommended in terms of effective use of resources and suppression of industrial waste.

In order to recycle asphalt, it is said that the generated material must be crushed and heated, and a new asphalt mixture should be mixed and used as a paving material. Such a technique has already been established, and is described in detail in, for example, “Plant Reclaimed Pavement Technology Guide” issued by Japan Road Association (published by Maruzen Co., Ltd.).

A heating process is essential in the manufacturing process of asphalt mixture, but the conventional heating process is hot air heating, direct heating, a heat exchanger type or a steam type, in which the material is heated from the outer peripheral portion. there were. On the other hand, there is a high frequency heating method as a heating method industrially used in other fields. This high-frequency heating method includes induction heating and dielectric heating from the principle. Of these, induction heating generally concentrates on the surface of the material to be heated, so uniform heating is difficult and it takes time to heat. Dielectric heating can uniformly heat an electrically defective conductor in a short time. In particular, water having a dielectric constant 10 to several tens of times higher than that of the generated material is rapidly heated by the dielectric heating and evaporated.

By the way, when the above-mentioned generating material is mixed as an asphalt mixture for paving, if the mixing ratio of the generating material is increased, it is troublesome to adjust the mixing due to the deterioration of the generating material and the like. In order to do so, the mixing ratio must be suppressed to 10% or less, which hits a wall that is contrary to the expanded use of the generated material.

In the first place, the deterioration of the generated material cannot be neglected in the recycling process, as well as the deterioration caused by the environment used in the past. That is,
In order to utilize the generated material, it is conventionally provided by crushing and selecting the generated material as described in the above publications, followed by heat treatment, and mixing with a new asphalt mixture. Here, since the heating step is performed by hot air heating or direct heating, deterioration due to ignition or carbonization occurred. Also, if the asphalt exceeds 140 ° C, it emits smoke and the deterioration progresses. However, with the conventional heating method, the temperature inside and outside the generated material is difficult to be uniform and the outside temperature exceeds 140 ° C in most cases. Ignition of smoke accelerated the deterioration.

In order to solve the above-mentioned problems, the applicant of the present application filed an application for a heating method of a generated material and its apparatus in Japanese Patent Application No. 5-350528, and succeeded in greatly improving the problems. However, in the above-mentioned application, since it is configured to process a large amount of the generated material, the equipment is large and it is difficult to apply it as it is to the emergency repair of the road surface.

[0010]

The above-mentioned repair process has been taken for the temporary repair of the pavement road surface. However, the normal temperature mixture for emergency repair is one week if the damage is deep on the straight course of the road. Although the repair effect can be maintained to a certain extent, it often peels off in a short time when the damage is shallow or in a place where various forces act on the pavement such as a curve or an intersection or where there is a large amount of traffic. It was difficult to repair immediately with heated mixture during patrol.

[0011]

In view of the above, according to the present invention, a vehicle is equipped with an inductive heating device and an asphalt paving material, the vehicle is moved to a repair site, and the asphalt mixture is heated by the inductive heating device at the repair site for repair. Or, store the heated asphalt mixture in a heat insulation container and transport it to the repair site,
By removing the asphalt mixture from the heat insulation container at the repair site and repairing it, it is possible to find repair points during patrol and immediately repair with heating compound.

[0012]

Embodiments will be described in detail below based on embodiments. 1 shows a vehicle 1 equipped with a dielectric heating device 2 and a generator 3, FIG. 2 shows a vehicle 1 equipped with a heat insulation container 4, and FIG. 3 shows a structure equipped with a heat insulation heater 5 and filled with an antioxidant gas. FIG. 4 is a sectional view of the heat retaining container 4, and FIG. 4 is a sectional view of the emulsion container 6.

The vehicle 1 is generally a truck or a light van. Whichever is used, when the generator 3 is mounted, it is necessary to install the generator 3 with sufficient consideration so that the exhaust gas of the engine of the generator 3 does not fill the vehicle 1. When the power source of the vehicle 1 is used, devices such as an AC / DC converter and a voltage regulator are arranged and used according to the specifications of the dielectric heating device 2 as needed.

Conventionally, asphalt mixture is heated in a large plant, transported by a dedicated truck, lowered by a scoop or the like in an amount according to the repair site, and used. It was transported by moving it to the repair site, but the temperature of the asphalt mixture fell during transportation, and it is difficult to know the appropriate amount required for repair, so it is transported a lot, so it remains on the truck in most cases. There was a problem such as.

Therefore, the asphalt mixture is preliminarily subdivided into 1 to 10 kg and heated to a predetermined temperature by the dielectric heating device 2 so as to be easily mounted on a vehicle or transported and to be easily heated by the dielectric heating device 2. It is packaged in a heat-resistant packaging material that does not melt. Since the asphalt mixture is heated to 130 to 140 ° C. by the dielectric heating device 2, the member for packaging the asphalt mixture must have heat resistance as well as sufficient consideration of gas expansion due to heating. For example, if you configure the inside with a heat-resistant breathable package and the outside with a hermetically sealed package and remove the outer package when heating to heat it, it will prevent oxidation of carbon dioxide, argon, etc. in the packaged state. It is possible to stably prevent the oxidation of the asphalt mixture over a long period of time by filling the gas with the above and opening it at the time of use.

Since the asphalt mixture in this case is heated by dielectric heating, the quality of the asphalt mixture is deteriorated due to carbonization due to ignition, deterioration due to smoke generation, or temperature difference between the surface and the inside due to heating, as compared with conventional burner or hot air heating. Since there is no such thing, it is effective to use the generated material obtained by excavating the pavement surface.

On the other hand, in addition to the method of heating the mix on-site, if a small amount of the mix that has been dielectrically heated in advance is always loaded on the vehicle during the road patrol, it will be immediately heated as soon as a defect in the pavement is discovered. Strong repairs can be performed and the number of re-repairs can be saved. In order to mount the heated mixture on a vehicle, it is convenient to put the heated mixture in the heat insulation container 4 so that it can be taken out as needed. The heat insulating container 4 can achieve its purpose as long as it has a lid 6 and has a heat insulating structure, and has a double structure container in which a heat insulating material 7 is enclosed between the inner and outer containers, and the inner and outer containers. The so-called thermos structure container in which a vacuum is formed between the containers and the combination thereof can be effectively applied.

It is effective that the heat-retaining container 4 is equipped with a heat-generating means such as a heat-retaining heater 5 and, in order to prevent the mixture contained therein from being oxidized, a gas container 8 prepared separately is used. It goes without saying that a structure in which an inert gas such as carbon or argon can be injected and filled through the gas hose 9 or the like is preferable. It is easy to use the power source of the vehicle as the power source of the heat retaining heater 5, but the power generator 3 may be separately mounted.

It was possible to easily repair the pavement surface with the heating mixture on site, using the asphalt mixture and the in-vehicle dielectric heating device 2 or the heat insulation container 4 which were divided into small portions. The emulsion must be applied to the asphalt mix to improve adhesion between the asphalt mixes prior to filling. Conventionally, this emulsion has been supplied in 200-liter drums, but it is inconvenient to transport it to the repair site as it is, and it has been transported in small portions such as 18-liter portable cans. However, when subdividing or applying to a repaired place in the field, it spills around the portable can, and it is necessary to use nerves to carry and handle the portable can. In addition, tools such as a brush for applying are applied. Had to carry.

Therefore, this emulsion was added to 100 cc to 1000
The emulsion is subdivided into cc, stored in a flexible emulsion container 6, and the emulsion is squeezed out of the flexible emulsion container 6 at the repair site for use. It suffices for the emulsion container 6 to be pressurized from the outside so that the emulsion inside can be poured out. The emulsion container 6 is flexible enough to return to its original shape when the external pressure is stopped, or even if the external pressure is stopped. Any shape that maintains its original shape and does not return to its original shape can be effectively applied. By subdividing the emulsion in this way,
The convenience of transportation and the ease of handling can be obtained at the same time, and in combination with the on-vehicle heating means, the pavement repair of the road can be performed quickly.

If the emulsion container 6 is flexible and has a straw-shaped portion 12 having a slender tip, the sealing portion 1 at the tip when used.
3 may be cut, opened, and poured into a repair place. If the unsealed emulsion remains in the emulsion container 6, you can easily prevent the emulsion from leaking out by bending it with the straw-shaped part 12 and pressing it with a clip, so when you move to the next site or another day. It is possible to effectively prevent the emulsion from spilling due to a fall or the like when stored in preparation for the above.

[0022]

As described above in detail, according to the present invention, by improving the heating method, the defective portion of the pavement is found immediately after the heating and mixing is performed on the spot together with the small amount packaging of the asphalt mixture and the emulsion. It can be said that this is an extremely effective method for traffic safety because it can be repaired with a material, so the repair process is only required once and peeling unlike the case of normal-temperature mixture is eliminated. In addition, by applying dielectric heating, most of the generated materials that were previously discarded as industrial waste can now be effectively used as paving materials, and as a means of recycling industrial waste. It is a very useful method even in the environment.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment.

FIG. 2 is a side view of another embodiment.

FIG. 3 is a diagram showing an embodiment of a heat insulation container.

FIG. 4 Cross-sectional view of emulsion container

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle 2 Dielectric heating device 3 Generator 4 Insulating container 5 Insulating heater 6 Lid 7 Insulating material 8 Gas container 9 Gas hose 10 Power cord 11 Plug 12 Straw-shaped part 13 Sealing part

Claims (11)

[Claims] 1. A method for repairing asphalt pavement, characterized by mounting a dielectric heating device and an asphalt pavement material on a vehicle, moving to a repair site, and heating the asphalt mixture with the dielectric heating device at the repair site to repair it. . 2. A method for repairing asphalt pavement, characterized in that the heated asphalt mixture is stored in a heat insulation container, conveyed to a repair site, and the asphalt mixture is removed from the heat insulation container at the repair site for repair. 3. The method for repairing asphalt pavement according to claim 1, wherein the asphalt pavement material among the asphalt pavement materials is divided into 1 kg to 10 kg and packaged. 4. Of asphalt paving materials, asphalt mixture is divided into 1 kg to 10 kg and packaged.
The method for repairing asphalt pavement according to claim 1 or 2, wherein the package is filled with a gas that prevents asphalt from oxidizing. 5. The method for repairing asphalt pavement according to claim 1 or 2, wherein the asphalt mixture is a generating material obtained by peeling from the pavement site. 6. Of the asphalt pavement materials, 10 emulsions are used.
The method for repairing asphalt pavement according to claim 1 or 2, which is formed by accommodating in a flexible container of 0 cc to 1000 cc and having a straw-like tip. 7. The method for repairing asphalt pavement according to claim 1, wherein the electric power for the dielectric heating device is supplied from the vehicle. 8. The method for repairing asphalt pavement according to claim 1, wherein the electric power for the dielectric heating device is supplied from a power generator separately mounted on the vehicle. 9. The method for repairing asphalt pavement according to claim 2, wherein the heat-retaining container is filled with a gas for preventing the oxidation of the asphalt mixture and conveyed. 10. The heat insulation container is a thermos container.
The method for repairing asphalt pavement according to claim 2. 11. The heat insulation container has a heat insulation heater built-in,
The method for repairing asphalt pavement according to claim 2.