WO2006006179A1

WO2006006179A1 - Road paving apparatus & process thereof

Info

Publication number: WO2006006179A1
Application number: PCT/IN2004/000204
Authority: WO
Inventors: Chandresh Kunwar
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-12
Filing date: 2004-07-12
Publication date: 2006-01-19
Anticipated expiration: 2007-01-12

Abstract

The road paving apparatus comprises a container (1), a mixer (4), a vibrating platform (6), a roller (2), and a controller or controlling unit (3).

Description

ROAD PAVING APPARATUS & PROCESS THEREOF

The present invention relates to paving of roads and more particularly to an apparatus for laying successive layers of paving materials to a surface so as to form a road of desired, quality and strength.

BACKGROUND OF INVENTION:

Roads are very important for development of a country as a major part of transport is done by roadways. Road is a very basic infrastructure a country needs. Construction of roads needs to be effective, economical, of high quality, less time consuming and safe.

In modern technique of road construction roadways are usually paved, which provides a more durable surface for vehicular traffic. Construction of roadways consists generally of two activities (a) pavement of a new roadway, (b) repairing of an existing roadway. In the construction of new roadways, pavement is typically applied to an unpaved base after it has been graded and compacted

(i.e. the new roadway is surfaced). In the repair of the existing roadways, however pavement is typically applied to the surface of the existing roadway.

With the passage of time, existing roadways become worn and need repair. Cracks develop on the surface of the roadway and/or the surface may become overly smooth. In either event the existing roadway surface becomes dangerous to drive on and thus, present a public safety concern. With the, development of cracks the surface wilt no longer be water resistant and the roadway will deteriorate at an accelerated pace. On the other hand, if the surface becomes overly smooth the skid residence of the roadway wh'1 be adversely effected which may lead to accidents. Because of these reasons, existing roadways need to be periodically resurfaced or repaved in the course of proper maintenance.

Pavement can be either of flexible or rigid construction. Rigid pavement are typically formed of concrete or the like, while flexible pavements typically comprise a combination of aggregate materials (eg. gravel, sand, crushed stone, etc.) and adhesive materials (eg. liquid asphalt, emulsified asphalt, bituminous material, binder material, coal tar etc.)

The most common process for paving roadway with flexible pavement is "chrpsealing". In chipsealing, loose aggregate material is dropped into a surface of previously applied layer of adhesive material which binds the aggregate material to the surface.

By and large, chip sealing is a relatively fast and inexpensive technique for surfacing or resurfacing of a roadway. However, chipsealing process has several hotel deficiencies. Firstly, the liquefaction of coal liar is done in an open place which produces deuse black fumes which is injurious to health. Second, sometimes the proper mixing of coal tar with chips is not done and the road is not set properly leaving cracks and space for water percolation, in turn damaging the roads. Thirdly, improper mixing of coal tar and chips cause air voids when the road is paved, which causes the road to suspend at many places. In this suspended portion of road water gets stored leading to quick deterioration of road. Fourthly, the existing process of road construction involves a large number of persons adding to the cost of road construction.

In addition to the shortcomings noted above, it is also found that presently employed chipsealing process often leave loose particles of aggregate material on the freshly paved roadway surface. More particularly, it has been found that many particles of aggregate materials do not sufficiently subserve up to the underlying adhesive material or bond therewith. This is particularly true for top level particles.

SUMMARY OF THE INVENTION:

Accordingly, a primary object of the present inventions is to provide an improved roadway paving apparatus and method that overcomes the above identified deficiencies in presently employed chipsealing process of roadway construction.

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A more specific object of the present inventions is to provide an apparatus and method for paving roadways that allows a single device to apply a desired thickness of pavements to a surface in a single process.

A related object of the present invention is to provide an apparatus and method for paving roadways that allows a single device to apply a relatively thick layer of the unpaved base of a new roadway in a single pass.

Another object of the present invention is to provide an apparatus and method for surfacing or resurfacing roadways that effectively bonds aggregate material to a surface.

An additional object of the present invention is to provide an apparatus which reduces the deuse biack fumes decreasing pollution and health hazard.

A further object of the present invention is to provide an apparatus which provides a uniform mixing of the chips to coate and in turn providing better sticking and bonding.

A further object of tine inventions is to provide an apparatus which help reduces air voids in between the chips which destroy the compactness of the road.

Still another object of the present invention is to provide an apparatus and method for paving, surfacing and/or resurfacing of a roadway that realizes substantial cost efficiencies over presently-employed process. Accordingly, a road paving apparatus which fulfills all the aoove oojects is provided in the present invention. The surface may either be the unpaved base of a new roadway or the surface of an existing roadway, the apparatus of his present invention in particular comprises a container, mixer, platform, vibrator, roller, moving units, controlling units, energy source and vibrating plate.

Brief Description of the Drawings:

The brief description of the parts depicted in the drawings are as under:-

1. Container - It is a place in Roboroader-11 where raw materials are kept which is used in construction of bitumen road.

2. Roller - It is an iron made rolling unit, which is light and used for primary settlement of chips.

3. Controller - It is a device by which every motion and function may be controlled manually.

4. Mixer - A place where uniform mixing of the coal tar and chips takes place.

5. Sprayer - It is provided for spraying liquefied coal tar on the roadbed before failing of chips - bitumen mixture on it.

6. Vibrating platform - It vibrates for uniform and layered fallout of mix on the roadbed.

7. Leveler - It is provided for layering of the mixer in a uniform and of desired thickness.

8. Input for chips in container - A passage in th container from where raw materials are fed inside the container (1) 9. Bevel gear - A gear system, which is limited to the motion oτ the model only.

10. Direction indicator - It is provided for exact direction fixation of the Roborader 11 according to the curvature of the proposed path.

11. Wire - It connects controller (3) to working devices and limited to requirements of the model only.

12. Outlet for mixer and sprayer - Passage by which liquefied coal tar flows to mixer and to sprayer (5).

13. Outlet for chips - A passage by which chips fallout to the mixer (4) from container (4).

14. Input of chips - A passage from which mixer gets chips from container (1)

15. Input bitumen - A passage from which mixer (4) gets liquefied coal tar from outlets (12)

16. Pipe containing coal tar - A rubber pipe provided for containing liquefied and pressurized coal tar to various places.

17. Compressor - A device that compresses liquefied coal tar during heating and takes it under high pressure.

18. Coal tar chamber - A chamber provided for storage of coal tar inside the container (1).

19. Chips Chamber - A chamber is provided for storage of chips inside the container (1).

20. Water - It is the water containing part of the chamber. 21. Coated cylindrical surface - A cylindrical metallic surrace that is provided to separate coal tar from direct flame and coal tar is heated by conduction of heat from this cylindrical surface.

22. Flame pipe - It is provided for flames for the liquefaction of coal tar, it is porous and gas fuel passes inside that pipe.

23. Coal tar unliquefied - Unliquefied coal tar placed inside the coal tar chamber (18)

24. Liquefied coal tar - Place of the liquefied coal tar during and after the heating.

25. Flame heat symbolized - Heating flame propagation is shown inside and above (21) and (22).

26. Surface where mixed materials falls - A part of the vibrating platform (6) where mixed materials falls from mixer (4)

27. Side wall - It is provided on the vibrating platform (6) side by side for prevention of the falling and spreading of the mixed materials here and there:

28. Final leveler - It is provided for more perfect layering of mixture on the roadbed.

29. Adjustable screw - It is provided for the fixation of leveler height as per the required thickness of the road.

30. Side wall - Similar as side wall (27)

31. Platform surface - It is the whole surface of vibrating platform (6) which includes surface (26).

32. Cams - It is a mechanical system, which is provided in the model for the vibration of the platform. 33. Fixed axis - An axis about which vibrating platform (6) vibrates.

34. Vibration mode - A pattern shown, on which vibrating platform vibrates.

35. 45^* turned blades - Blades inside the mixer supports mixing, are turned in its structure, to about 45* for better mixing.

36. 3-D nozzle system - Nozzles are provided al along the three directions and over the length of the mixer comprises a system named as 3-D nozzle system.

37. Outlet for mixed material - An outlet provided for falling out of mixed material on the platform surface (26).

38. Blades - These are provided inside the mixer attached to axis (39).

39. Connected to source rotator - The axis fixed with blades (38) is rotated by source rotator whatsoever it may be, via bevel gear (9) system.

Detailed Description of the ϊnvention:-

The roadway paving apparatus "Raboroader", constructed in accordance with the teachings of the present invention is generally designated by A. In figurel the Roboroader showing all part have been depicted. It broadly comprises a container (1), mixer (4), vibrating platform (6), roller (2), & controller or controlling unit (3).

The container comprises of compressor (7) coal tar chamber (8), chips chamber (19) water chamber (20) coated cylindrical surface (21) flame pipe (22) coal tar unliquefied (23) liquefied coal tar and flame heat symbols. (25) The container (1) is placed outside the Raboroader where the raw materials are placed in different chambers i.e. the chips container (19), water container (20) and the coal tar container (18). The third chamber is subdivided two parts the lower part (22) for flame and the upper part (24) containes coal tar for its liquefaction, it is also connected with a compressor (17) which creates pressure inside the liquefied coaltar. This pressure is needed for spraying the liquefied coaltar to mixer (4) and on road before the bedding of the chips.¹ This is done for fixing of the chips on the road. The chip chamber (19) is connected to mixer (14), through outlet for chips (13).

Two pipes made of Rubber are fixed with the chamber containing coal tar (24). The first one provides passage to liquid coal tar to spray into the mixture and the other one gives passage to coal tar to the foremost part to spray it on road. A water chamber is provided for sprinkling water on the wheels of the robot so that it is prevented from sticking with coal tar sprayed over there. The roller which is used after spreading of mixture to road bed is attached with the backside of the equipment and it is light. The only purpose of it is to fix the position and orientation of the chips so that when heaving rollers are applied the cracking of the chips is minimized.

Vibrating platforms (16) spreads the mixture on road bed in a uniform maser. The mixture when falls on the roadbed from the vibrator it provides orientation to the chips in their relative position of ease. So that when it comes under heavy rollers the probability of.crushing is reduced. It also provides the initial compaction to the mixed mass by bringing the chips closer and minimizes air voids. This helps in lessening the chances of passage to water percolation hence maximum durability of the roads as water is the prime destroyed of the bitumen road.

Roller (2) is made up of iron, which is light in weight and used primary for settlement of chips on the road, it is based on axial roiling system by friction

force.

Controlling unit: A controlling unit (2) control every method and function of the Raboroader like moving forward and backward and the turning of robot. The controlling unit (3) is connected by wires (11) with the robot. The control is set up in primary technology robots or in same medium technology robots. There are three switches each having three modes. First switch is for proves whed system, which is for movement of robot in X-y plane in forward and backward direction, one mode for stopping the motion, second switch is for turning clockwise, anticlockwise and for stopping the turning action. The third switch is for mixer, it controls the mixer blades action over the mixing materials. These controls may be executed by software programming, for this we will have to fit a device inside the robot which can run the programme these can be put on a remote control. For this we will have to fix a sensor inside this robot. The strength of the machine parts and tools depends upon the job performance and loads the Raboroader has to perform. The energy source can be the D₁C. Motors or diesei engine as required.

Claims

Abstract

1. The road paving apparatus "Raboroader comprises a container (1) mixer (4) vibrating platform (6), roller (2), & controller or controlling unit (3)

Claim

2. The apparatus as claimed in claim 1 The container comprises of compressor (7), coal tar chamber (8), chips chamber (19) water chamber (20) coated cylindrical surface (21) flame pipe (22), coal tar unliquefied (23), liquefied coal tar and flame heat symbols (25).

3. The apparatus as claimed in claim 1 The Vibrating platforms (16) spreads the mixture on roadbed in a uniform maser. The mixture when falls on the roadbed from the vibrator it provides orientation to the chips in their relative position of ease.

4. The apparatus as claimed in claim 1 The Roller (2) is made up of iron, which is light in weight and used primary for settlement of chips on the road, it is based on axial roiling system by friction force.

5. The apparatus as claimed in claim 1 The A controlling unit (2) control every method and function of the Raboroader like moving forward and backward and the turning of robot.

6. The process of road paving by the apparatus as claimed in claim 1 , Two pipes made of Rubber are fixed with the chamber containing coal tar (24), The first one provides passage to liquid coal tar to spray into the mixture and the other one gives passage to coal tar to the foremost part to spray it on road. A water chamber is provided for sprinkling water on the wheels of the robot so that it is prevented from sticking with coal tar sprayed over there, The roller which is used after spreading of mixture to road bed is attached with the backside of the equipment and it is light, The only purpose of it is to fix the position and orientation of the chips so that when heaving rollers are applied the cracking of the chips is minimized.