Innovative assessment techniques for roadbase materials

摘要

The RTA Pavement Structures Section undertook innovative laboratory and field assessment techniques for roadbase materials and pavement stabilisation processes during 2010 and 2011. One of the main drivers for this work was to contribute to RTA sustainability and energy reduction objectives through greater use of available 'alternative material' sources such as industrial by-products, recycled construction and demolition wastes, and marginal or non conforming natural materials as components of a proposed pavement structure. The techniques have been applied to the marginal gravels in western NSW, mixes of heavy duty roadbase material from Northern region, recycled glass/sandstone blends and recycled concrete blends sourced from industry suppliers. Complementing the environmental objectives, the effectiveness of stabilisation techniques and suitability of materials for stabilisation is part of long term, systematic investigation of the potential for re-use of existing roadbase materials. Field evaluations have been undertaken of construction trials in the Southern Region of NSW using innovative techniques such as infrared imaging for temperature measurement.