Rehabilitating roads by replacing wearing course is a highly cost-effective and eco-friendly process, very popular in numerous countries

VÖGELE now present a cutting-edge concept, ideal not only for paving thin layers on spray seal or tack coat, hot on hot, but also highly interesting for many non-specialized road building companies. The VÖGELE SprayJet Module offers an economical and clean alternative wherever pre-spraying and subsequent paving are required.

The concept of the ”Paver with SprayJet“ is based on a SUPER 1800-2 of standard design which, after minor modification and addition of a newly developed spray module, can be used as a spray paver. The motif behind this concept was above all economic aspects, as in comparison with other systems, the paver can be converted back to a standard paver in a very short time and used for conventional paving as usual. The SprayJet Module offers a host of technological advantages. For instance, the rate of spread can be set from 0.2 kg/m², allowing the bitumen emulsion to be finely metered and applied in small volumes at slow pave speeds. Thanks to an extremely low and constant spraying pressure of just 3 bar prevailing in the system, the spraying work can be performed with a minimum of spray mist and pollution. As this was not possible with previous systems, the SprayJet Module is a trailblazer in both economical and ecological terms.

• Maximum pave width 10m
• Laydown rate up to 700 tonnes/h
• Maximum layer thickness 30cm
• Transport width 2.55m
• Pave speed up to 24 m/min.
• Travel speed up to 4.5km/h
• Powerful PERKINS engine rated at 129.6kW
• ErgoPlus, the concept for easy paver handling
• Hardtop with wide sunshades

• Uniform rate of spread across the entire pave width up to 5m.
• Spray volume from 0.2kg/m² allows smallest quantities to be applied highly economically.
• Very low and constant spraying pressure
  (3 bar) reduces spray mist to a minimum
  and achieves uniform spraying.
• Rate of spread can be selected between 0.2 and 1.0kg/m², irrespective of the pave speed (2 to 20m/min.).
• Optimal spray pattern due to double-slotted
  spray nozzles.
• Easy handling
• Practical automatic function to set “Start” and
  “Stop” of spraying.

The SprayJet Module includes an emulsion tank holding 2,000 litres. Handling the SprayJet system is very easy. All the operator needs to do is enter the desired rate of spread on his touch screen. No other input is required for standard spray operation.

As a matter of principle, the tank should be filled with hot emulsion. But of course, the tank nevertheless comes with an integrated heating unit (2 x 7 kW) to keep the emulsion at the desired temperature. Temperature sensors are fitted in order to prevent the emulsion from burning and automatically switch off the heating process if the emulsion level becomes too low. The heating limit can be set via controller to a value between 0 and 80 °C. In order to maintain the bitumen emulsion in a highly homogenous state, the SprayJet Module comes with a heated emulsion pump driven by a hydraulic motor with rpm sensor. This pump ensures that the emulsion is kept in constant circulation.

The SprayJet Module is controlled with the help of an on-board computer. A control panel, easily accessible, is provided on the spray module. Just like the ErgoPlus operating concept for the paver, handling is extremely easy as self-explanatory symbols are provided. The specified rate of spread or desired emulsion temperature, for example, can thus be configured very easily.

• Emulsion tank holding 2,000 litres, heated electrically and insulated against loss of heat.
• Sensor controlled safety shutdown of heating unit to prevent the emulsion from burning.
• Emulsion tank filled by internal pump at up to 120 litres/min. or, alternatively, via external pmp (e.g. tanker).
• Cleaning of pump system and spray bars by compressed air and rinsing.
• Control panel on the SprayJet Module to select operating mode of the emulsion pump and activate/deactivate single spray nozzles.
• SprayJet Module can be tilted though 15° for easy access to perform maintenance services.
• Closed circuit for constant circulation of the
  emulsion, no splitting, no foam.

Compressed air tanks with a total capacity of 60 litres are integrated in the paver for supplying the pneumatically operated spray nozzles with compressed air. In the system a pressure of 8 bar prevails.

The SUPER 1800-2 is fitted with five spray bars with a total of 20 self-sealing spray nozzles. The spray bars are so positioned on the paver that the emulsion film spread on the base cannot be damaged by the paver’s tracks.

The special technical design of the nozzles and the constant spraying pressure of 3 bar allow abolutely uniform spraying. Spraying does not take place continuously but in pulsed operation. The formation of spray mist is also reduced substantially by the new VÖGELE system, as the spraying pressure is very low and the spray droplets are larger. VÖGELE SprayJet thus represents a major advantage for the job site team, too, as emulsion fumes are reduced to a minimum. The accurate technique makes it possible to even spray along road curbs without getting emulsion on the curb.

A very important technical innovation of the VÖGELE SprayJet Module refers to the rate of spread. While previous systems were only able to apply large emulsion quantities, SprayJet allows to select a spray volume from 0.2kg to 1.0kg per square meter. This allows working even at slow pave speeds without applying more emulsion than specified. Paving at speeds of between 2 and 20m per minute is possible without any problems.

Like all ”dash 2“ generation pavers, SUPER 1800-2 comes with the VÖGELE ErgoPlus operating concept, which substantially facilitates handling of the paver for the paving team. For use with the SprayJet Module, an additional menue for spraying is integrated in the display of the ErgoPlus operating console.

In addition to the functions for activating and deactivating the spray system, this menue also provides two other very useful features that allow the ”Start of job“ and ”End of job“ to be selected at the press of a button. The ”Start of job“ function ensures that the various spray bars are activated selectively, so that the spraying process over the entire pave width starts precisely at the specified point. When activating the “End of job” function, spraying stops accordingly.

SUPER 1800-2 with SprayJet Module combines with the AB 500-2 Extending Screed. The screed allows pave widths up to 5m. AB 500-2 is available in the versions TV (with tamper and vibrators) or TP1 (with tamper and 1 pressure bar) for high compaction.

Like all VÖGELE screeds, AB 500-2 features electric heating. Screed and emulsion tank are heated independently, so that 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.

On the two ErgoPlus operating consoles for the screwmen, all vital information is displayed. Thanks to self-explanatory symbols, set-up and adjustments can easily be made.