Austroads has published seven updated test methods for the calibration of bitumen sprayers, saying that the performance of Australia’s road network is dependent on the application of sprayed sealing technology.

“Consistent high-quality sprayed sealing work requires well-defined and controlled application rates of binder and aggregate. This quality control is crucial if sprayed seals are to remain a viable surfacing option in the face of increasing traffic levels, particularly the increase in the volume and size of heavy vehicles,” noted Austroads.

Several Austroads projects have addressed the selection and design of sprayed seal treatments.  It is expected that the performance requirements discussed in the new test methods will ensure that bitumen spraying is completed to a high standard, ensuring that road surfaces are durable and high quality.

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