JPH02296908A - Improved road surface layer regenerating method - Google Patents

Abstract

PURPOSE:To uniformly regenerate the surface layer to improve the operating efficiency by automatically controlling a solenoid valve on a liquid passage to be closed when the gas pressure exceeds a specified value or when the temperature in a gas tank exceeds a specified value. CONSTITUTION:Respective electric circuits of control mechanisms of vaporizing devices 12, a solenoid valve, a pressure control valve, a thermometer, a fan motor, etc., are connected to a microcomputer incorporated in a control panel 6B installed in a road surface heating car 1. When the gas pressure in a gas tank 10 exceeds a specified value of 10kgf/cm<2>, and/or when the temperature in the gas tank 10 exceeds a specified value of 40 deg.C, the solenoid valve on a liquid passage is closed to stop the fan motor. Further, when the gas pressure is below a specified value of 5kgf/cm<2>, the fan motor is rotated and the solenoid valve on the liquid passage is automatically controlled to be opened so as to operate the vaporizing devices 12.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides road surface regeneration using the improved pave method or remix method by combining an improved road surface heating vehicle and an improved road surface regeneration machine. In particular, the present invention relates to a road surface regeneration method using a road surface regeneration machine which has a multi-axis rotor for scraping and mixing the asphalt pavement surface layer, is arranged perpendicular to the direction of vehicle movement, and is kept warm.

[Conventional technology]

When repairing asphalt-paved roads, a road heating vehicle heats the surface layer of the pavement to soften the asphalt mixture.
After that, the existing pavement surface layer is scraped up using a road surface regeneration machine.
The method used is to sprinkle asphalt softener, stir, level it, supply new paving mixture as needed, and then compact it with a subsequent roller car to complete the repair.

The structure of the road heating vehicle used for repairs is to maintain a heater panel at a predetermined height above the road surface at the bottom of the self-propelled vehicle.
Gas-fired systems that supply gas to the heater panel from a propane gas cylinder mounted on a self-propelled vehicle are common.
Gas cylinders are equipped with many small cylinders. In addition, road surface regenerators are used in which the heating device and the scraping and mixing device are separated.

By the way, in actual construction, it is a hassle to replace the gas cylinder with a crane, and the gas cylinder is filled with liquefied gas, so when the liquefied gas vaporizes, the heat of vaporization is released. There was a problem in that the heater panel was unable to maintain sufficient calories by absorbing heat from the surrounding area. In addition, in the road surface regeneration machine, the pavement surface layer heated to a high temperature is cooled from the surface until the loosening and mixing device arrives, and the
Since it does not have a means of heating, stirring in an atmosphere at outside temperature will cause a sudden temperature drop.The temperature at which asphalt paving material can be loosened is the softening point of the asphalt contained in the paving material. In addition, the average temperature of the entire loosened asphalt mixture is required to be within a predetermined temperature at the time of rolling. If the temperature at the depth of scraping is below the softening point, the aggregate in the mixture will be damaged and the surface of the aggregate will be exposed to which asphalt is not attached, significantly impairing the compaction effect.

[Problem to be solved by the invention]

Therefore, there is a strong desire to maintain the thermal efficiency of road surface heating vehicles as effectively as possible, and because the mixing device of conventional road surface regenerators uses an l-axis rotor, it is difficult to achieve uniform mixing, especially when various types of regenerated additives are added. When mixing and regenerating by adding materials, new asphalt mixtures, etc., there is a problem that uneven mixing tends to occur. In an effort to eliminate this uneven mixing, some machines are equipped with two-axis rotors parallel to the direction of travel of the car, but they do not expose the scraping surface to the outside temperature, or do not have a heating means for keeping it warm. Therefore, the temperature drop could not be avoided, and it was impossible to improve the quality of the regenerated mixture by these factors.

The present invention solves the above-mentioned problems and uses a road surface heating vehicle and a road surface regeneration machine having the following configuration so that gas of uniform pressure can always be supplied to the heater panel and work efficiency can be improved. This is to select a combination.

[Means to solve the problem]

The control mechanism for the vaporization device is located in a microcomputer built into the control panel located on the body of the road heating vehicle.

The electric circuits of the solenoid valve, pressure control valve, thermometer, and fan motor are connected, and when the gas pressure in the gas tank exceeds a predetermined pressure, the solenoid valve in the liquid path is closed, the fan is stopped, and the gas pressure is maintained at the predetermined level. When the pressure drops, the fan is rotated and the solenoid valve in the liquid path is opened to automatically operate the vaporizer. And the supply gas pressure is 10 kg during operation.
f/crA or higher and the gas tank temperature is 40℃
When the voltage exceeds 8! Close the valve and stop the fan motor, and when the gas pressure falls below 5 kgf/cJ, rotate the fan motor and
This is a road surface heating vehicle that is controlled to open a solenoid valve in the liquid path and operate a vaporization device.The road surface regeneration device also has a rotor device that scrapes and combines the asphalt pavement surface layer at the bottom of the vehicle body, a screw spreader, and The rotor device is equipped with a screed, a conical pin is installed in the front rotor, a flat bit is installed in the rear rotor, a support frame that can be moved up and down by a cylinder, an opening at the bottom, and a heating chamber at the top. A plurality of rotors are arranged in parallel at right angles to the traveling direction of the vehicle body, and the rotors are arranged so that each rotor rotates in the opposite direction in the parallel order. This uses a roadside surface regeneration machine equipped with a heating means that heats and maintains heat at a high temperature.

[Effect]

In the gas supply system of a road heating vehicle, by checking the gas pressure supplied to the heater panel, the vaporizer is controlled to maintain uniform heating, and by checking the temperature and gas pressure inside the gas tank. , controls the rotation of the vaporization fan and maintains safety. This eliminates the risk of the gas pressure becoming too high, allowing construction work to be carried out safely. In addition, the gas pressure is controlled and the road surface can be heated evenly regardless of the season or even on the same day, morning or afternoon, altitude, or temperature, significantly improving work efficiency.

Regarding the road surface regeneration machine, the asphalt pavement surface layer is scraped and kneaded by both rotors in the mixer room, and the pavement surface material lumps are exposed to the high temperature atmosphere of the mixer room, the temperature of the rotor, and the temperature when sliding with the heat insulation plate. It is heated by heat exchange or the like and can be kneaded well. In this case, an increase in temperature of 10 to 30 degrees is sufficient for heating the pavement surface material mass. Further, during this mixing, if an additive is appropriately injected from an injection nozzle, the mixture is modified. As the vehicle moves forward, new paving material (in this case, asphalt mixture) in the hopper is carried to the rear via the bar feeder and falls onto the pavement in front of the second screw spreader. The paving material is the second
It is flattened to a predetermined height by a screed spreader and rolled by a second screed at the rear. 1st
The screw spreader and the first screed perform leveling and compaction below the pavement surface, and the second screw spreader and the second screed perform the final leveling and compaction. . As a result, pavement with cracks, peeling, etc. is regenerated to the thickness of the existing pavement surface layer.

[Example] An example of the present invention will be described based on the drawings. FIG. 1 is a side view of the road surface heating vehicle, and FIG. 2 is a plan view thereof.

A front wheel 3 and a rear wheel 4 are arranged at the lower part of the vehicle body 2 of the road surface heating vehicle 1 in a configuration similar to that of a normal automobile, with the rear wheel 4 configured as a driving wheel and the front wheel 3 configured as a running wheel. The upper part of the vehicle body 2 is formed flat, and an engine unit 5 and a driver's seat 6 are disposed in the front part on the left and right sides, and the engine unit 5 is connected to the rear wheels 4 through a transmission mechanism (not shown). to drive. Also, behind the engine unit 5,
A generator 7 and a hydraulic pump 8 are provided, and are configured to obtain power from each h engine unit 5.

The driver's seat 6 is provided with various instruments 6A and an operation panel 6B containing a microcomputer at the front thereof, and a handle 6C is configured to run on the front wheels 3. A fuel and oil tank 9 is provided at the rear of the driver's seat 6.

A large gas tank 10 is mounted on the upper rear portion of the vehicle body 2. A gas tank 10 is located in front of the gas tank IO.
A valve stand 11 and a vaporizer t12 connected to each other by a gas path are disposed. A central heater panel 13 is disposed at the lower part of the vehicle body 2 between the front wheels 3 and the rear wheels 40 so as to be movable up and down. That is, in FIG. 1, a sheave 14.14 is disposed on the car body 2 so that its axis is perpendicular to the longitudinal direction of the car body 2, and a hanging wire 15.15 is wound around each sheave 14,14. ing. Further, a cylinder 16 is installed horizontally on the vehicle body 2, the upper end of the suspension wire 15.15 is connected to the front end of the piston rod 16A, and the heater panel 13 is connected to the lower end of the suspension wire 15.15. The central heater panel 13 is suspended, and the height of the central heater panel 13 can be adjusted by moving it up and down by operating the cylinder 16.

The central heater panel 13 includes the vaporizer I2...
The gas path leading from the is connected. Furthermore, as shown in the plan view in FIG. 2, the central heater panel 13 is extended outwardly wider than the width of the vehicle body 2, but when the vehicle body is
When traveling, the vehicle body 2 can be folded into two via hinges (not shown) provided directly below both end surfaces of the vehicle body 2.

A front heater panel 18 is disposed at the front of the vehicle body 2 via a vertical support shaft 17. A rectangular main frame 19 is pivoted on the front side of the support shaft 17 in a manner perpendicular to the longitudinal direction of the vehicle body 2. At the lower end of the main frame 19, a lower frame 20 is horizontally extended in the front direction of the vehicle body. It is attached to the shaft 19A via the shaft 19A. The lower frame 20 has a hinge 2OA at its longitudinal center.
20I3 is a fixture for fixing the folded part in a horizontal position. Also, lower frame 2
A support ring 21.21 is provided at the tip of the lower frame 20 to keep the tip of the lower frame 20 horizontal.

Above the main frame 19, winches 22 and 22 are installed at both ends.
The hoisting wire 22A extending from the winch 22.22 is connected to the sheave 2° provided on the lower frame 20.
It is tied to OC. As a result, the fixture 20B
When the lower frame 20 is opened and the winches 22 and 22 are hoisted and driven, the lower frame 20 stands up about the shaft 19A with the tip facing downward and the center being high (as shown by the chain line in FIG. 1). A heater panel 18 is fixed to the lower frame 20, and the heater panel 18 is formed to be wider than the width of the vehicle body 2, but the heater panel 18 has an edge line on the vehicle width side.

It is configured so that it can be folded downward from a slightly inner part of L via hinges 23, 23, . . . .

Therefore, the vaporizer 1 is mounted on the front heater panel 18.
This connects the gas path from 2....

A rear heater panel 25 is disposed at the rear of the vehicle body 2 via a support shaft 24. The main frame 19, the lower frame 20, and other related structural members that support the rear heater panel 25 are the same as those of the front heater panel 18, so the same members are given the same reference numerals. O inside the gas tank
The vaporized gas generated inside the heater panels 13, 18 .
25. The pressure of this supplied gas is 5kg
When the gas pressure is above 5 kgf/cd, gas is supplied smoothly, but when the gas pressure drops below 5 kgf/cd, the input is automatically input to the fan motor, and the fan rotates to vaporize the gas in the tank 10. encourage So the supply gas pressure is 3kgf/cd
It will continue as it is unless the gas pressure drops to 3k.
When the gf/c vessel is lowered, the solenoid valve in the gas path is closed and an alarm (light, sound) is issued, and the solenoid valve in the liquid path is opened and each vaporization bag 'r112... is vaporized. Operation rJ
Start. Thereafter, when stopping the 0 operation in which the same control as described above is performed, the main switch is turned off and the solenoid valve is closed.

As mentioned above, in the gas supply device, by checking the gas pressure supplied to the heater panel, the vaporizer is controlled to maintain uniform heating, and by checking the temperature and gas pressure inside the gas tank. , controls the rotation of the vaporization fan and maintains safety. This prevents the risk of the gas pressure becoming too high (and allows construction work to be carried out safely.In addition, the gas pressure is controlled regardless of the season, and even on the same day, regardless of the morning, noon, high temperature, or temperature. Since the road surface can be heated evenly, work efficiency is improved.

Next, the road surface regenerator will be explained. Figure 3 is a side view of the road surface regenerator, with the left side in the figure being the front. The road surface regenerator 30 is a self-propelled vehicle having a drive wheel 31 and a small front wheel 32, and is configured such that the front wheel 32 can be driven uphill by a steering wheel 33A.

The front upper part of the car body 33 has a low and sloping front part to accommodate the hopper 3.
4 is loaded, and a bar feeder 35 is slidably installed from the bottom of the hopper 34 to the rear of the vehicle body 33.
4 is conveyed to the front of the second screw spreader 58 at the rear of the vehicle body. In the lower part of the vehicle body 33,
Heaters 3 are installed between the front wheels 32 and the driving wheels 31 in order from the front.
6, a scarifier 37 and a first mixer M10-ta device 38 are provided. The heater 36 uses a combination of far infrared rays and a gas burner, and heats the surface layer to be repaired when repairing the surface layer of an asphalt pavement. This heating temperature is appropriately changed depending on the outside temperature and the asphalt of the paved road, and reference numeral 36A is a gas cylinder that supplies gas to the gas heater.

The scarifier 37 has three claws 37A arranged in a staggered manner in the front and back, and a plurality of protrusions laterally at predetermined intervals.The scarifier 37 is configured so that the claws can be sunk under the road surface and the whole can be raised by a cylinder 37B. By moving the vehicle body 33 with the pawls 37A immersed in the pavement surface layer, the pavement surface layer can be scraped.

As shown in FIGS. 4 and 5, the rotor device 38 has a support frame 39 formed in a straight shape with an opening 39A at the bottom, and an inner ceiling 39B stretched inside the support frame at the lower part of the support frame. A mixer chamber 40 is formed, and a heating chamber 41 is defined above the mixer chamber 40 via a heat insulating plate 41A. The heat insulating plate 41A is formed in an arc shape so that the asphalt mixture comes into sliding contact with the upper part of the rotor as the rotor rotates, and has openings 41B and 41B at the front and rear of the vehicle body.

At the upper part of the heating chamber 41, there is a protruding portion 4 that protrudes above the middle ceiling 39B and extends in a direction perpendicular to the vehicle traveling direction.
1C, the protruding part 41C has a double structure, the inside is made of a heat-resistant aluminum plate, a heat insulating material 41D is attached to the hollow part, and a heater 42 consisting of a gas burner is installed below the protruding part 41C. The heater 42 is arranged so that the flame is directed downward, and the pipe 42A of the heater 42 is connected to the gas cylinder 36A via a hose (not shown). A blow nozzle 43 is connected to the upper part of the heater 42.
2, and is connected to an air blower 43B above the middle ceiling 39B via a duct 43A.

In the mixer chamber 40, a plurality of rotors 44, 45 (two in the drawing) are arranged parallel to the front and back of the vehicle body and perpendicular to the direction of travel of the vehicle body. Each rotor 44, 45 is
Both ends of the shafts 44A, 45A protrude outside the support frame 39, and both ends are supported by bearings 46°47.
A sprocket 47A is attached to one end of A. Hydraulic motors 4B and 49 are disposed above each rotor 44 and 45 above the middle ceiling 39B, and the output shaft 4 of the motor 49 is
A sprocket 49B is attached to 8A and 49A, and a chain 49C is installed between both sprockets 47A and 49B. Reference numeral 49D is a chain cover.

The other ends of the shafts 44A, 45A of the rotors 44, 45 (on the left in FIG. 5) project outward from the respective bearings 46, 46, and have couplings 50, 50 fixed to the ends. Each connector 5
Nos. 0 and 50 have a connecting hole on the end surface, and are configured to fit and connect the shaft of the amplification rotor.

The road surface regenerator 30 having the above configuration is operated as follows.

As an example, we will discuss partial surface repair work when cracks, peeling, etc. have occurred on the surface layer of an asphalt pavement.

With the asphalt mixture placed in the hopper 34, the surface layer of the paved road is heated by the heater 36 at the repair site. Since the heater 36 requires a temperature necessary for softening the asphalt material to the depth of the existing surface layer, the heater 36 heats the existing surface layer to the depth of the existing surface layer using a far-infrared heater. Heat takes a certain amount of time to conduct through the pavement surface, so
Measured from the scraping depth, thermal conductivity of the paving material, outside temperature, etc.
A certain period of time before the time of scraping with the scarifier 37,
The surface layer of the pavement is heated in advance using a road heating device.

When the pavement is sufficiently heated, the drive wheels 31 are driven to move the vehicle forward, and the scarifier 3
7. Lower the bits 52 and 53 of the rotor device 38 to a predetermined depth. For example, by inserting the claw 37A of the scarifier 37 to a depth of 5 cm from the ground surface, it will cut through the heated existing pavement surface layer to a thickness of 5 cm. If the existing surface layer is 5 cm deep, remove the conical bit 52 of the front rotor 44 of the rotor device 38 from the ground surface by 5 cm.
m set so that the rear rotor 45 has a flat spot 53.
When set to sink 4 cm from the ground surface, the roadbed surface layer scraped up by the scarifier 37 will be absorbed by the front rotor 44.
The flat bit 5 of the rear rotor 45
3... further stirs the mixture and enables good kneading.

When the heating chamber 41 is heated in advance using the heater 42 and the atmosphere inside the heating chamber 41 is heated to 120° C. to 350° C. by blowing air from the air blowing nozzle 43, the heat insulating plate 41A is heated, and mixer room 4
The atmosphere at 0 can also be maintained at a significantly higher temperature than the outside air, and each rotor 44° 45 will also be at a higher temperature.

Therefore, in the mixer chamber 40, both rotors 44.4
5, the asphalt pavement surface layer is loosened and kneaded, and the pavement surface layer material mass is heated by the high temperature atmosphere of the mixer chamber 40, the temperature of the rotors 44 and 45, and the heat exchange when slidingly contacting the heat insulation plate 41A, and is good. It is possible to perform thorough kneading.

In this case, an increase in temperature of 10 to 30 degrees is sufficient for heating the pavement surface material mass.

Moreover, if an additive is appropriately injected from the injection nozzle 54 during this mixing, the mixture is modified.

As the vehicle body 33 moves forward, new paving material (asphalt mixture in this case) in the hopper 34 is carried to the rear via the bar feeder 35 and falls onto the pavement in front of the second screw spreader. The paving material is leveled to a predetermined height by a second screed spreader 58 and rolled by a second screed 59 at the rear.

The first screed spreader 56 and the first screed 57 perform leveling and compaction at a position below the pavement surface, and the second screed spreader 58 and the second screed 59 perform the R final laying. Break in and compact. As a result, pavement with cracks, peeling, etc. is regenerated to the thickness of the existing pavement surface layer.

The present invention is not limited to the above configuration.

For example, the rotor device 38 has two rotors 44 and 45, but may have three or four rotors, and the shape, rotation direction, and speed of the rotors are arbitrary. It is common knowledge that this road surface regeneration method is generally called the remix method, and it is also common knowledge that if new material is not supplied after the first mixer, this method is also called the pave method. This machine allows you to freely select either the Remix method or the Revave method, depending on the conditions of the existing road pavement surface layer to be reclaimed.

〔Effect of the invention〕

The present invention has the following excellent effects.

(1) Since it is equipped with a large gas tank instead of a small gas tube, once gas is supplied to the gas tank, it can be operated for a considerable time, and there is no need to load or unload the gas tube. Work efficiency is improved without any unpleasantness.

(2) Multiple vaporizers are arranged in parallel in the gas path between the gas tank and the heater panel, so if the natural vaporization of the liquefied gas in the gas tank is insufficient,
In addition to being able to actively vaporize liquefied gas by supplying liquefied gas from the gas tank to the vaporizer, it is also possible to control the full use of multiple vaporizers or use only one depending on the temperature and gas usage. Therefore, you can work in cold regions, high mountains, etc. without running out of gas pressure.

(3) The temperature of the gas tank and the gas pressure of the gas line are checked, and when the temperature and pressure are above a predetermined temperature and pressure, the fan stops, the solenoid valve of the liquid line closes, and the operation of the vaporizer also stops. Since the fan rotates and the vaporizer also operates when the gas pressure falls below a predetermined pressure, it is safe because the gas pressure does not become too high, and the gas pressure can be kept within a certain range under any conditions. Since the pressure can be maintained, the road surface can be heated evenly.

(4) Since the rotor device of the road surface regenerator is equipped with a plurality of rotors, it is possible to evenly scrape and knead the paving material and spread it out.

(5) The rotor device has a heating means, so even if the outside temperature is low, it keeps the scraped paving material warm or warms it up, making it asphalt!・It is possible to maintain the softening degree of the material and evenly knead and spread it.

(6) It is possible to regenerate the pavement to the desired surface depth at the current location.

[Brief explanation of drawings]

The drawings relate to embodiments of the present invention, and FIG. 1 is a side view of a road surface heating vehicle, FIG. 2 is a plan view of the road surface heating vehicle, FIG. 3 is a side view of the road surface regenerator, and FIG. 4 is a side view of the road surface heating vehicle. FIG. 5 is a side view of the rotor device of the regenerator, and FIG. 5 is a longitudinal sectional front view of the rotor device. 1... Road surface heating vehicle 2... Vehicle body 3... Front wheels 4... Rear wheels 5... Engine unit 6... Driver's seat 6A... Instruments 6B...
・Operation panel 6C...handle 7...generator 8
...Hydraulic pump 9...Fuel tank 10...
・Gas tank IOA...Safety valve 10B...Thermometer 10C...Pressure switch IOD...Temperature control valve 1
1... Valve stand 12... Vaporizer 13...
・Central heater panel 14... Sheave 15... Hanging wire 16
...Cylinder 16A...Piston Rondo 17...Support shaft 18...Front heater panel 19...Main frame 19A...Shaft 20...
Lower frame 2OA... Hinge 2OB... Fixture 20C... Sheave 21... Support shaft
22...Winch 22A...Hoisting wire 2
3... Hinge 24... Support shaft 25... Rear heater panel 30... Road surface regenerator 31... Drive wheel 32...
・Front wheel 33...Vehicle body 33A...Steering 35...Bar feeder 36A...Gas cylinder 37...Scarifier M...First mixer 37B...Cylinder 39A...Opening 39C...・Opening/closing lid 40...Mixer chamber 41A...Heat insulation plate 41G...Protrusion 42...Heater 43...Blower nozzle 43B...Blower 44.45...Rotor 44A, 45A...・Shaft 47A...Sprocket 48.49...Motor 48A, 49A...Output shaft 49B...Sprocket 34...Hopper 36...Heater 37A...Claw 38...Rotor device 39・... Support frame 39B... Middle ceiling 39D... Window hole 41... Heating chamber 41B... Vent 41D... Insulating material 42A... Pipe 43A... Duct 46.47 ... Bearing 49C ... Chain 49D ... Chain cover 50 ... Connector 52 ... Conical bit 53 ... Flat bit 54 ... Additive injection nozzle 56 ... First screen Spreader 57...First screed 58...Second screed Spreader 59...Second screed

Claims (1)

[Claims] A self-propelled vehicle is provided with a heater panel in the lower part, a gas tank in the upper part of the vehicle body, a plurality of vaporizers arranged in the upper part of the vehicle body, and a gas path and a liquid path extending from the gas tank. The vaporizers are connected in parallel, the gas paths are branched and connected to burners in each heater panel, a solenoid valve and a pressure control valve are interposed in the liquid path and each gas path, and the gas tank is connected to the gas tank. is equipped with a thermometer, a pressure control valve, a fan on the side, and a microcomputer built into an operation panel installed on the vehicle body, which controls the control mechanism of the vaporizer, the solenoid valve,
The electrical circuits of the pressure control valve, thermometer, and fan motor are connected, and when the gas pressure in the gas tank exceeds a predetermined pressure, the solenoid valve in the liquid path is closed and the fan is stopped.
When the gas pressure drops to a predetermined pressure, we use a road heating vehicle that automatically controls the fan to rotate, open the electromagnetic valve in the liquid path, and operate the vaporizer. 2 or more, or when the gas tank temperature exceeds 40 degrees, close the solenoid valve in the liquid path and stop the fan motor, and when the gas pressure falls below 5 kgf/cm^2, the fan The control structure is configured to rotate the motor and open the solenoid valve of the liquid path to operate the vaporization device, and the rotor device that scrapes and mixes the existing asphalt pavement surface layer at the bottom of the vehicle body, the first and second screw spreaders, and In a road surface regeneration machine equipped with a screed, the rotor device is formed into a support frame that can be moved up and down by a cylinder, a mixer chamber having an opening at the bottom and a heating chamber at the top, and a plurality of rotors are arranged in the direction of movement of the vehicle body. The rotors are arranged in parallel at right angles, and the rotors are configured to rotate in parallel in the opposite direction, and the heating chamber is provided with heating means for heating and keeping the internal atmosphere of the mixer chamber at a higher temperature than the outside temperature, and the heating means A heating chamber is partitioned by providing a heat insulating plate in the upper part of the mixer chamber, and a gas burner is arranged in the heating chamber, and the heating means is a blower for supplying high-temperature air from the heating chamber to the mixer chamber. A method for regenerating an asphalt pavement surface layer by using a road surface regeneration machine equipped with a means and selecting either the repave method or the remix method as appropriate depending on the conditions of the existing pavement surface layer to be regenerated.