|Sustainability and recycling|
An alternative and more sustainable approach to building new roads and reconstructing old roads is to reuse the existing material combined with a binder to strengthen the road material providing another 20 or more years of pavement life. This process may be used for unsealed and sealed rural and urban roads, and it has been successfully used for urban freeways, such as the M4 in western Sydney.
Using the existing material eliminates the need for heavy construction equipment to move soil and pavement material to land fill and then return with quarry products. This also minimises further damage to streets, generates less noise, lowers vehicle emissions and results in less traffic congestion on the road network.
The ready availability of quarry materials is also declining because of strict new environmental guidelines and the need to respect land owners. It is now well understood that we must use our natural resources, including energy, more wisely.
For more technical literature on this topic refer to the following papers:
Recognition of sustainability by using stabilisation in road rehabilitation by Warren Smith and George Vorobieff, May 2007 (click here for copy – 284 kB)
Recognition of environmental and social advantages of using stabilisation in road rehabilitation by Warren Smith, May 2005 (click here for copy – 203 kB)
Is Road Recycling a Good Community Policy? by Tom Wilmot and George Vorobieff, 1997 (click here for copy – 65 kB)
A Review of Patching as a Pavement Maintenance Tool by Warren Smith, 2010 (click here for acopy – 1287 kB)
Pavement Stabilisation in Local Government Policy Change for a Sustainable Future by Scott Young, May 2012 (click here for a copy – 261 kb)