The Super 1800-2 SJ (for SprayJet) paver offers improved technology for placements of sophisticated pavement preservation surfacings like NovaChip® Ultrathin Bonded Wearing Course from Sem Materials Inc.
SprayJet technology with the Super 1800-2 SJ lets pavement preservation contractors take advantage of new, powerful spray technologies. The Super 1800-2 SJ permits spraying of a tack coat and asphalt paving to take place in one pass, promoting optimum bonding between layers, keeping the job site clean, and eliminating the tack coat truck from the paving train. Its ability to spray liquid asphalt or emulsion also makes it an ideal application vehicle for ultrathin bonded wearing courses, in which modified emulsion and aggregate can be placed in one pass.
Five precisely adjustable spray bars with a total of 20 self-sealing spray nozzles are located at the front, sides and behind the crawler tracks, and are supplied with emulsion from a large, heated tank with a capacity of over 528 gallons.
The SprayJet module incorporates a high-precision control system which lets it spread emulsion in small volumes (from 0.04 lbs./sq. ft.) at slow pave speeds. Its very low constant spraying pressure (43.6 psi) lets spraying be undertaken with very little mist and drift.
In keeping with Vögele’s ErgoPlus design, operation of the SprayJet module is simple. Once the operator has set the required quantity to be metered, the spray pressure and spray rate are automatically adapted to the paving speed and width.
The Super 1800-2 SJ uses the ultra-modern AB 500-2 Extending Screed, which permits paving widths of up to 16.4 feet wide. Like all Vögele screeds, the AB 500-2 features electric heating. The screed and emulsion tank are heated independently, so heating of the emulsion can take place without having to heat the screed. An additional gas heating system can be used to quickly heat up cold emulsion.
And without the SprayJet module, the Super 1800-2 SJ reverts to a conventional high-performance paver. Without the SprayJet module the Super 1800-2 can pave up to 32 ft., 9 in. wide, with a laydown rate of up to 772 tons per hour and forward speed of up to 79 fpm.
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