Surfacings & Pavements

Excavating test pits and/or drill coring to confirm the material profile and layer thicknesses is an important step in pavement evaluation preceding detailed rehabilitation design. However, these investigation techniques are destructive to the pavement, expensive,…

In Western Australia, full-depth asphalt (FDA) pavements are provisioned primarily in metropolitan heavy traffic volume/load applications. Recent observations by Main Roads suggest these pavements may be subject to premature deterioration due to moisture ingress. While…

End-of-life rubber from vehicle tyres and industrial functions has the potential to be recycled in crumb rubber modified (CRM) binder technology for road building applications, such as sprayed bituminous seals and asphalt wearing courses. The…

Maintaining Western Australia’s vast road network to provide a consistent level of service is a complex and costly exercise. Depending on several factors not limited to design, materials, construction, traffic and environment, pavements will consume…

Granular materials used in the design and construction of pavement base and subbase layers are often assessed for suitability based on the California Bearing Ratio (CBR) value. This measure provides an indication of the load…

Current waste management challenges across the world have required governments to develop innovative policies that target the implementation of single-use materials throughout the economy. Sustainable materials and construction practices are the future of road infrastructure…

Main Roads Western Australia has implemented the Infrastructure Sustainability Council (ISC) rating process for major projects, which requires the quantification of greenhouse gas (GHG) reductions and other sustainability impacts. The ISC sustainability ratings tool can…

As new technology is trialled and rolled out there is a need to determine how recyclable these materials are. Crumb Rubber Modified (CRM) bitumen is gaining momentum and WARRIP is investigating the recyclability of asphalt…

When constructing roads, materials are affected by water rising up through the compacted layers, this capillary rise effect is measured and provided to Main Roads. As this is a requirement, designers use various methods to…

Western Australian roads require rehabilitation to ensure that road users have safe well maintained roads to use. Austroads recently released a guide advising on evaluating and treating roads. WARRIP is taking to national practices, consulting…