There has been a significant amount of well-documented research carried out in Australia and other countries into the processes of insitu stabilisation for pavement construction. However, despite this wealth of knowledge, many engineering consultants and indeed even pavement engineers often have a limited understanding of the applications and benefits of stabilisation techniques in pavement construction. This paper outlines the various applications where research into insitu stabilisation can be applied, ranging from improved subgrades through to total pavement construction. It looks at specific projects such as the widening of the runways at Changi airfield in Singapore, and the addition of an extra lane to the M4 motorway, Sydney, and a rehabilitation project on the Newell Highway, NSW. These examples illustrate techniques to fully utilise existing material, minimising the use of virgin materials while working under very restricted access and time restraints. The paper provides guidelines as to when stabilisation techniques should be considered and suggestions on evaluation of the pavement structure. Evaluation of pavement designs should consider both economic and environmental outcomes. While economic evaluation is well understood, the paper explores factors that should be considered in the evaluation of a pavement structure to ensure compliance with the principles of sustainable development. (a) For the covering entry of this conference, please see ITRD abstract no. 0612AR242E.
Abstract