since November 27, 1997GENERAL
The Pyropaver 300 E is a Canadian system for hot in place Asphalt Recycling on roads. The equipment consists of three separate units and one conventional asphalt paver. This method gives, besides savings in material, a new homogenously mixed layer at lower costs.
DESCRIPTION
The surface is heated by infrared radiation and milled in two steps to a desired depth, 20-65 mm. The mix of the old asphalt layer can be changed directly by adding virgin asphalt and new type of bitumen or rejuvenator. The two-stage recycling means the sequential heating and removing of two separate layers of asphalt in one continuous operation. Alternatively working widths are 3,5 m and 4,2 m.
ENVIRONMENT
From environment point of view, the Pyropaver 300 E is today the most complete recycling equipment in the world market. Contrary to other European recycling equipments, Pyropaver 300 E has an efficient emission control system, which gives a virtually smokefree operation.
INFORMATION
on the equipment and recycling method can be obtained from:
Al Rorison at Can Internation Enterprises Ltd.
3006-C Spring Street, Port Moody, B.C. V3H 1Z8
Phone 250-851-9991 Fax 250-851-9992
s@sunnyokanagan.com
ENVIRONMENTAL CONSIDERATIONS
Government agencies worldwide are seeking methods of demonstrating their environmental responsibility to a demanding public. The Pyropaver 300E responds to that need in an extremely productive and highly cost effective manner.
1 . Recycling asphalt minimizes the demand on sources of oil, a non-renewable resource.
2. Recycling asphalt minimizes the demand on sources of aggregate (gravel) which is also a non-renewable resource and becoming more difficult to acquire as existing sources are depleted.
3. Recycling provides access to billions of gallons of petroleum contained in the asphalt on existing roads and highways. In the U. S. alone, the existing 4 million miles of roads hold a 270 billion gallon petroleum reserve.
4. Recycling asphalt eliminates the need to dump old asphalt pavement in already overcrowded landfills. Dumping just one mile of old pavement into a landfill is equivalent to storing 3,000 crushed compact cars.
5. The Pyropaver 300E's emission control system protects the air quality during operation. The preheater and units "A" and "B" have dedicated emission control systems.
6. As recycling replaces pavement to original elevations there is no need to treat turn lanes or other less worn travel areas. This further reduces the need to utilize non-renewable resources such as oil and aggregate.
7. As a hot in-place recycling system, the Pyropaver 300E system minimizes the requirement for asphalt trucks used with conventional systems to haul asphalt from the plant to the paver.
8. The Pyropaver 300E system utilizes propane which is a much cleaner, more environmentally sensitive source of energy
TECHNICAL DESCRIPTION OF EQUIPMENT AND PROCESS
The Pyropaver 300E is the only two stage, hot in-place asphalt recycling system available today. Contractors operating in the United States, Canada, and Mexico have purchased the Pyropaver 300E system. The system provides a proven method of recycling asphalt to a depth of 2" and with the ability to add rejuvenates and virgin asphalt if and as required. Although it is often used as a stand-alone maintenance alternative, the design engineer may also use the Pyropaver 300E to recycle the bottom lift and place virgin hot mix for the final lift.
The Pyropaver 300E is referred to as a two-stage system as the heating and milling process is accomplished by two heating and milling units that operate in tandem. This process ensures the heat required to achieve the 2" depth does not degrade the asphalt content, often experienced with single stage systems. It is the proper softening ofthe bottom 1 to 1 1/4" that yields material as rich as new mix, and when combined with the upper 1 ", in the pugmill, results in a mix that compares well with original material, requiring little or no rejuvenate in most cases.
The Pyropaver 300E system, often referred to as a "train" consists of;
PREHEATER
Excess surface moisture interferes with the efficient heating of recycled asphalt pavement. Therefore, the asphalt surface is preheated to remove excessive moisture prior to the main heating and milling process. This is accomplished by a preheater unit, trailered behind a 1500 U.S. gallon capacity propane supply 5 ton truck. The truck is equipped with two 80/40 propane vaporizers. The preheater utilizes high air flow burners fired horizontally, one foot above the pavement, into an insulated steel enclosure designed to dissipate the moisture while heating the entire lane width. Four hydraulic cylinders are utilized to raise and lower the burner system as required. Rubber tired wheels are used for trailering and are replaced by steel wheels for operation. Emissions are naturally aspirated through exhaust stacks into an emissions combustion chamber where unburned hydrocarbons are incinerated prior to discharge
Measurements: Truck - 30' x 8' x 10'; Preheater - 26' x 12'6" x 13'
Weights: Truck - Front axle: 12,000 lbs.; Rear axle: 21,000 lbs.; Shipping weight: 17,000 lbs.; Operating weight: 28,000 Ibs.; Preheater: - Rear axle: 10,000 Ibs.; Shipping weight: 17,000 Ibs.; Operating weight:17,000 lbs.
UNIT "A"
Unit "A" is a self propelled machine which employs banks of propane-fired, nickel cadmium, infrared heaters to heat a full lane-width of asphalt to a depth of 1 to 1 114". The units two parallel 5' rotating milling heads remove the upper I" of softened asphalt from each side of the lane and windrows the material to the center of the lane.
A computer controlled 1,300 gallon rejuvenate dispensing system, linked to the forward speed of the unit, is located on Unit "A" and provides the ability to add rejuvenate to comply with specified application rates required by the contract.
Measurements: Traveling - 57' x 10'6" x 13'; Operating - 57' x 12'6" x 12'6"
Weights: Front axle: 30,000 lbs.; Rear axle: 44,000 lbs.; Shipping weight: 56,000 lbs.;
Operating weight: 62,000 lbs.
Engine: Caterpillar 3306B
UNIT "B"
Unit "B" immediately follows Unit "A" and is pushed by the track paver. This unit employs a 4' milling head and drag-slat conveyor to pick up the windrow from Unit "A" and transports the material over the heater banks of Unit "B", dropping it in front of the Pugmill, mounted at the end of Unit "B".
The infrared heaters of Unit "B" then heats the newly exposed asphalt to a depth of 1 to 1 /4" and a 12' milling head removes the lower layer of asphalt, windrowing it with the material from Unit "A". The full-width milling head operates with automatic grade controls, adjustable on both sides which provides for reshaping or reprofiling of the pavement surface.
Unit "B" is equipped with a front-mounted Hopper which meters new mix or coated aggregate into the drag-slat conveyor relative to the speed of the unit, according to design requirements.
A Pugmill attached to the rear of Unit "B" then picks up the windrow, which includes material from Unit "A" and "B", and any new material, and thoroughly mixes it prior to elevating it into the paver hopper and unmediate re-application to the highway surface.
Measurements: Traveling: 49' x 10'6" x 12'6"; Operating: 49'3" x 13'1" x 12'6"
Weight: Front axle: 27,000 lbs.; Rear axle: 38,000 lbs.; Shipping weight: 54,000 lbs.;
Operating weight: 62,000 lbs.
Engine: Caterpillar 3406B
Other technical features include all axle steering on both units; emission control systems on the preheater and Units "A" and "B"; ease of dealing with castings and manholes; conversion to mobilization status within 30 minutes; and fuel capacity providing for full-day operation without interruption.
The productivity of the Pyropaver 300E depends on asphalt condition, depth of operation as well as ambient and surface temperatures. These factors impact on heat penetration which, in turn, determines the speed of operation. On average, the system has the ability to recycle to a depth of 2" at a speed of 20' per minute or approximately 2 lane miles a day.
Pyrotech Asphalt Equipment Mfg Co Ltd
COMPANY DESCRIPTION:
Manufactures the Pyropaver 300E hot in-place asphalt recycling system.
Main Business: Manufacturing
Secondary Business: Education and training of pavement design engineers, technicians and contractors.
Tertiary Business: Project development assistance
MARKET: Global
CORPORATE PROFILE
Pyrotech Asphalt Equipment manufactures the PYROPAVERT series of hot in-place asphalt recycling systems. The latest model, the Pyropaver 300E, not only performs the recycling of asphalt concrete pavements to exacting standards, but incorporates a fiull emission control system which is a significant new development in the hot in-place recycling industry.
The PyropaverTM 300E
Hot In-Place Asphalt Recycling System
The Company conducts an ongoing and extensive education program to acquaint government agencies worldwide with the many benefits of pavement rehabilitation using the Pyropaver technology. Main advantages for pyropaving are:
· tremendous cost savings
· safety and convenience for the traveling public
· pavement quality restored to like-new condition
· environmentally and ecologically sound operation
Emission control system , Hot in-place recycling continues its evolution by Asphalt Contractor, May 1995.
Photo 1 , Overall hot in place recycling train showing preheater (truck drawn unit), primary heater/miller, secondary heater/miller, paver and rollers.
Photo 2 , Preheater.
Photo 3 , Primary heater/miller cyclogen added in this unit
Photo 4 , Secondary heater/miller and paver. Hopper for addition of virgin aggregate attatched to this unit.
Photo 5 , Closeup of secondary heater/miller. Centre of photo shows grinder. Note Windrow material going into Windrow elevator.
Photo 6 , View of Windrow elevator and tracked paving machine..
Photo 7 , Breakdown roller. Note asphalt concrete looks very much like virgin mix.
Photo 8 , Before/after hot in place recycling showing type of distress being repaired.
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