JPH07310303A - Continuous half-deflective pavement method and device thereof - Google Patents

Abstract

PURPOSE:To increase the working efficiency, by going forward while continuously discharging a penetrating milk in which a hydraulic material is continuously mixed with water, on the surface of an asphalt pavement road and continuously scraping and smoothly leveling the penetrating milk just after the spraying it for finishing the surface. CONSTITUTION:A hydraulic material 12 stored in a hopper 11 is fed to a hopper 31 of a mixing and scattering device 30 from a constant discharging device 10. On the other hand, the opening of a valve 22 is adjusted to control the water feed volume from a water feeder 20 to the hopper 31. A penetrating milk kneaded by a mixing and scattering device 30 composed of a paddle mixer 32, a discharge screw conveyor 33, etc., is scattered from a trough 35 onto the paved surface while transferring the scattering device 30 by a tractor. A scraping device 40 provided with a scrapper brush 41, a rake 42, a finishing brush 44, etc., is pulled by a tractor to penetrate the milk from apertures on the pavement. In this way the devices 30, 40 are driven as a unit to increase the working efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for continuously applying semi-flexible pavement.

[0002]

2. Description of the Related Art Semi-flexible pavement is a pavement constructed by infiltrating an infiltration milk into which an hydraulic cement such as infiltration cement is kneaded with water in an open-grain size asphalt concrete. It has an intermediate property between pavement and concrete pavement (rigid pavement) and is an excellent pavement that does not cause ruts. Since this pavement has a short curing time, there is an advantage that the pavement can be quickly constructed.

Conventionally, the construction of this semi-flexible pavement is 25
Spread an open particle size asphalt mixture with a porosity of about 10% on the road surface, spread cement milk for permeation on it, and stir the pavement surface with a rubber rake etc. while shaking the milk with a vibrating roller or soil compactor. It was carried out in the process of permeating into the voids of the open particle size asphalt mixture. Then, at the time of construction of this semi-flexible pavement, the milk for infiltration to be infiltrated into the open-grained asphalt concrete is kneaded with a batch type mixer, and after completion of the kneading, it is sprayed on the pavement surface using a pump for pumping, etc. After that, it was spread with a rake or the like, permeated with a vibrating roller or the like, and the surface finishing was done manually by using a rake and a brush. In order to reduce the construction process by human power as much as possible, the applicant discloses a paving surface leveling device in Japanese Utility Model Publication No. 4-134516. As a result of constructing a semi-flexible pavement using this device, it was possible to achieve significant labor savings.

[0004]

In the construction of semi-flexible pavement, generally, a quick-setting hardener or the like is used and a set retarder for securing working time is added according to the situation such as weather, and batch type Cement milk, which is kneaded in a predetermined amount using a mixer of the above, is sprayed on the surface of an open-grained asphalt concrete pavement and allowed to permeate.Because the mixer for mixing the cement for permeation is a batch type, it is sprayed. It is difficult to rely on human power, and it is difficult to eliminate the human power even in the scraping work, and it is difficult to use the scraping device efficiently.

An object of the present invention is to provide a paving method and an apparatus used for the paving method, which can continuously and efficiently perform the steps from the step of kneading a hydraulic substance such as cement to the paving step to the permeation finishing. And

[0006]

The present invention was developed in order to solve the above-mentioned problems, and it is an infiltration obtained by kneading a hydraulic material into the voids of an asphalt pavement in which an open-grain size asphalt mixture is spread and leveled. In a semi-flexible pavement method in which a milk for spraying is permeated into the voids of the asphalt pavement, a hydraulic material and kneading water are continuously kneaded to continuously advance the milk for permeation to the asphalt pavement surface, This is a continuous semi-flexible pavement method characterized by continuously applying a smoothing and surface finishing of the milk for infiltration following the spraying.

An apparatus for carrying out this method is a movable sprinkling apparatus on which a kneading apparatus composed of a hydraulic material storage tank, a kneading water supply apparatus, a continuous kneading machine and a continuous discharging apparatus is mounted. A continuous semi-flexible pavement device, comprising: a scraping brush, a rake, and a finishing device in which a scraping device including a finishing brush is attached so as to be vertically movable. In this device, it is preferable that the continuous discharging device includes a discharging end portion that is swingable within 90 degrees to the left and right with respect to the central axis of the discharging device.

[0008]

FIG. 1 shows a process chart of the present invention. When spraying cement milk for infiltration on the paved surface laid with an open particle size asphalt mixture, the hydraulic substance 1 is measured by the measuring device 2 and sent to the mixing process, while the water 3 is measured by the measuring device 4 and mixed. To do. In the mixing step 5, the hydraulic substance 1 and the water 3 are kneaded to produce an infiltration milk. This is sprayed in the discharging and spraying step 6, and immediately thereafter, it is scraped and smoothed on the road surface in the permeation and scratching step 7. Next, in finishing step 8, surface finishing is performed by brushing.

In the mixing step 5, a kneading device capable of continuously kneading and discharging is used, and a hydraulic substance and water are supplied to the kneading device at a predetermined ratio, and the kneaded milk is discharged and sprinkled on the pavement surface. Advance. This kneading device is placed on a trolley having wheels for movement, and is sprinkled while moving by a towing vehicle. On the other hand, a brush and a rake for scraping and spreading the sprinkled milk are provided. It is possible to automate the paving work by towing a scraping and leveling device attached to a movable carriage by a towing vehicle and operating them integrally.

As for the mixing of the cement milk for infiltration, as shown in FIG. 2, the hydraulic substance 12 stored in the hopper 11 is supplied to the hopper 31 of the kneading / dispersing device 30 from the constant amount cutting device 10 by a screw conveyor or the like. On the other hand, water supply device 2
0 is a pipe 21, a valve 22, a flow meter 23, a control device 2
4 and the controller 24 controls the valve 22 according to the set value.
Adjust the opening of to control the water supply. Paddle mixer 3
The kneading and sprinkling device 30 including 2 and the discharging screw conveyor 33 discharges the infiltration milk from the gutter 35. A screw conveyor type may be used for both kneading and discharging.

The hydraulic material 12 to be used is mainly composed of Portland cement.
It is preferable to use the hydraulic material 12 which is premixed with a coagulation modifier for ensuring the working time. When this material is used, the number of fixed quantity supply devices may be small, variation in quality is small, and stable working time can be secured. The hydraulic material and water may be continuously supplied to the kneading device at a predetermined ratio (W / C), and it is not necessary to provide a supplying device for each material used, and the kneading device is simple and suitable.

A partial plan view of FIG. 2 is shown in FIG. 2,
As shown in FIG. 3, a rotatable discharge gutter 35 is provided at the discharge end of the kneading device, and this gutter is squeezed by a hydraulically driven actuator 36 to a right and left of 180 degrees or less, and preferably used in the next step. It is preferable to move the rake device within the width of the rake, because the spraying is made uniform and the permeation thickness is made uniform. If you use a vibrating traction device of the scraping and leveling device,
When permeating milk for permeation into the pavement gap, it is possible to eliminate unevenness due to air and unevenness due to shelf hanging, and it is not necessary to use a separate vibrating roller, which simplifies the process and shortens the working time. it can.

When the kneading device and the scraping device are operated, when the above-mentioned quick-hardening material is used, the setting time after kneading is short, and it is impossible to afford a work time for spraying and permeating the kneaded product. Therefore, use an adjusting agent to adjust the setting time to ensure proper working time. These work times are determined in consideration of the road release time, and are normally set to be about 35 to 50 minutes. In the case of the present invention, intervals are set so that all the work is completed within this time. It should be provided.

[0014]

【Example】

[Embodiment 1] FIG. 5 is a cross-sectional view showing a structure of a road pavement. Base layer asphalt concrete layer 5 on roadbed 51
2 is provided, and the semi-flexible pavement 53 is applied on it.
Semi-flexible pavement 53 is conventionally compacted with open-grained asphalt concrete 54, then cement milk 55 for infiltration.
It has been constructed by the method of infiltrating.

FIG. 1 is a block diagram showing the steps of the present invention. An asphalt mixture in which 3.5 wt% of asphalt is added to an aggregate having a maximum particle size of 20 mm and a sieve passing amount of 2.5 mm at 10 to 15% is supplied to an asphalt finisher (not shown) and spread on a road surface. Then, an open-grain size asphalt pavement having a porosity of 20 to 25%, which has been compacted with iron wheel rollers and tire rollers, is constructed. On this pavement, 70% by weight of ordinary Portland cement manufactured by Mitsubishi Materials Co., Ltd., and an alumina-based fast hardening material 10 manufactured by Mitsubishi Materials Co., Ltd.
%, Silica sand weight 15%, and admixture 5% by weight, the hydraulic material and the kneading water having a weight ratio of 45 to the hydraulic material.
% With each metering device, continuously supplying to the mixer section of the kneading device and kneading, then through the screw conveyor for discharge provided coaxially with the kneading blade of the mixer section The kneaded milk for infiltration was sprinkled on the pavement.

Then, the scraping and leveling device 40 shown in FIG. 4 was pulled by a towing truck, and the milk for infiltration on the pavement surface was infiltrated into the opening portion of the pavement. This scraping and leveling device 40
Includes a scraping and leveling brush 41, a rake 42, a finishing brush 44, and a wheel 43, and a device for vertically moving and a device for vibrating these. According to the example, not only the work by manpower was significantly reduced, but also the construction efficiency was remarkably improved.

[Example 2] 60% by weight of ordinary Portland cement, 20% by weight of a quick-hardening hardener, on an open-grained asphalt concrete having the same porosity as that of Example 1,
No. 7 silica sand 15% by weight, setting regulator 1% by weight, polymer 4
After the hydraulic material blended with the weight% was weighed by each measuring device so that the weight ratio of the hydraulic material and the kneading water would be 43%, and continuously supplied to the mixer section of the kneading device section and kneaded. , Through the discharge device, while reciprocating the discharge gutter installed at the discharge end of this discharge device at an angle of 50 to 60 degrees, pull the kneading device with a wheel tractor for pulling,
The milk for infiltration was moved while spraying on the pavement. After spraying, the milk for infiltration is infiltrated into the voids of the pavement (usually 40
Approximately 60 minutes) Run the scraping and leveling device that is pulled by the traction device that has the vibrating part, and remove the bubbles that are entrained when the milk for infiltration is infiltrated, while the milk for infiltration is densely packed in the voids of the pavement. After filling, the surplus milk for infiltration was scraped off and the paving work was completed.

The traffic was opened 3 hours after the paving work was completed. According to the sample test, the strength of the cured product when opened was a bending strength of 22 kg / cm ² (target of 15 kg / cm ² or more) and a compressive strength of 75 kg / cm ² (target of 50 kg / cm ² ).
² or more).

[0019]

According to the method of the present invention, the construction of the semi-flexible pavement can be automated and the labor can be saved, and the quality and workability can be improved.

[Brief description of drawings]

FIG. 1 is a process drawing showing a process of semi-flexible pavement of the present invention.

FIG. 2 is an explanatory view of a mixing and spraying device for semi-flexible pavement of the present invention.

FIG. 3 is an explanatory view of the mixing and spraying device for semi-flexible pavement of the present invention.

FIG. 4 is an explanatory diagram of a scraping and leveling device.

FIG. 5 is a cross-sectional view showing a structure of a road pavement.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Hydraulic substance 2, 4 Meter 3 Water 5 Mixing process 6 Dispersion process 7 Permeation scraping process 8 Finishing process 10 Quantitative cutting device 11 Hopper 12 Hydraulic substance 13 Screw conveyor 20 Water supply device 21 Pipe 22 Valve 23 Flowmeter 24 Control device 30 Kneading and sprinkling device 31 Hopper 32 Mixer 33 Screw 34 Motor 35 Gutter 36 Actuator 37 Wheel 38 Guide rail 40 Scraping device 41 Brush 42 Rake 43 Wheel 44 Finishing brush 51 Roadbed 52 Base layer Asphalt concrete layer 53 Semi-layer Flexible pavement 54 Open particle size asphalt concrete 55 Cement milk for infiltration

Claims (2)

[Claims] 1. A semi-flexible pavement method in which a penetrating milk in which a hydraulic substance is kneaded is spread in the voids of an asphalt pavement that is spread and leveled with an open-grain size asphalt mixture to penetrate into the voids of the asphalt pavement. The hydraulic material and the kneading water are continuously kneaded to continuously discharge the infiltration milk to the surface of the asphalt pavement and move forward, and following the spraying, the infiltration milk is continuously smoothed and finished. A continuous semi-flexible pavement method characterized by the above. 2. A movable spraying device on which a kneading device comprising a storage tank for hydraulic material, a kneading water supplying device, a continuous kneading machine and a continuous discharging device is mounted, and a brush for leveling, rake and finishing. A continuous semi-flexible pavement device, which comprises a penetrating device in which a scraping device made up of brushes is attached so as to be vertically movable.