Wednesday, 31 July 2019
Much recent research conducted by Austroads and other agencies has focused on improving design methods for road pavement strengthening treatments, to enhance the cost-effectiveness of rehabilitating pavements. As a result, Part 5 of Austroads Guide to Pavement Technology has been updated to incorporate the results of this research.
Part 5: Pavement Evaluation and Treatment Design covers pavement investigation, testing and evaluation; identifies causes and modes of distress; and describes treatment options. It has not been updated since 2011, during which time technologies and treatments have been superseded by improved methods.
“In 2017, Austroads changed the structural design method for new flexible pavements, which is described in Part 2 of Guide to Pavement Technology: Pavement Structural Design,” says Geoff Jameson, Chief Technology Leader, ARRB and project author. “This revision of Part 5 aligns the structural design of rehabilitation treatments with this method.”
Other significant improvements include:
- changing the mechanistic-empirical design of strengthening treatments for flexible pavements, to improve methods of determining design moduli of existing pavement materials and subgrade
- a new design process for calculating granular overlays using Traffic Speed Deflectometer deflections
- deleting asphalt overlay design charts.
Guide to Pavement Technology is an authoritative guide on pavement technologies, techniques and considerations for everyone involved in managing roads, including industry and students.