Lower spray temperatures save time, money and carbon

Traditional site practice is to spray emulsions in the temperature range of 80 – 90°C. This can involve having to reheat the emulsions during the working day to maintain spraying temperature and achieve a satisfactory viscosity for adequate spread rates and aggregate wetting.

It typically takes 25 minutes to heat emulsion by 10°C in a tanker, burning one litre of heating fuel per minute. This constant heating inevitably leads to delays to the surfacing operations and downtime as the surfacing crew stand waiting for emulsion to reach the correct temperature. Ultimately this affects how many square metres of road a crew can dress per shift.

The Emulsis range addresses this issue by dropping the permitted working temperature to 65°C. This gives a greater working temperature window and so potentially more square metres surfaced per shift.

Consequently, significant efficiences and carbon reductions can be derived. “Lower temperature spraying with Emulsis can add an extra week’s surfacing for a typical crew in a 90 day season” says Total Bitumen’s Market Development Manager Rick Ashton. “Using our model we can provide interested parties with further information on operational savings and carbon reductions.”

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