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Foamed Bitumen Stabilisation for Australian Airports
Conference presentation

Foamed Bitumen Stabilisation for Australian Airports

Gregory W White
Airfield Engineering and Maintenance Summit (Singapore, 25-Mar-2014–28-Mar-2014)
Equip Global
2014
url
http://www.equip-global.comView
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Abstract

Civil Engineering Transportation and Freight Services
Many regional airports in Australia are constructed from marginal materials, which was appropriate for the aircraft operating at the time of their development. Since then, aircraft operating at regional airports across Australia has grown significantly. Also, the ability to close pavements for rehabilitation or upgrades works has significantly reduced across all airports. This has led to foamed bitumen stabilisation becoming a more attractive option for pavement improvement when compared to traditional methods of granular reconstruction, deep asphalt reconstruction or cement stabilisation. Three recent projects at Australian airports have utilised foamed bitumen stabilisation to achieve a range of goals. This technology has been employed insitu and exsitu. Exsitu works have utilised both on-and off-site pug mills. Foamed bitumen stabilisation has been employed to improve existing marginal pavement material as well as new fine crushed rock. The three recent projects have shown that almost any marginal material's properties can be significantly improved through foamed bitumen stabilisation and that foam stabilised layers make adequate temporary wearing surfaces for light aircraft traffic. Foamed bitumen stabilised material can be trafficked immediately after construction and is resistant to moisture during and after construction. In light of the significant regional airport upgrade demand in Australia in the coming years, foamed bitumen stabilisation is expected to gain popularity and may become the rehabilitation treatment of choice for Australian airports.

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