Design and construction of nonconventional sprayed bituminous surfacing for a remote road network in Western Australia

This paper describes the design and construction of sprayed bituminous surfacing for a 30 km remote road network on Barrow Island (BWI) for the largest Liquid Natural Gas (LNG) project in Western Australia (WA). Stringent environmental conditions did not allow construction of temporary bypass roads during seal application on existing unsealed roads. Sprayed bitumen prime on the basecourse was not acceptable due to potential disruption of regular large heavy vehicle movements. Conventional primer seal using aggregate of up to 10 mm size was also not considered suitable for large heavy vehicle movements. A nonconventional 14 mm primerseal followed by a 7 mm single/single seal was selected. Class 320 bitumen was used as the binder. Design of the sprayed seal, i.e. binder application rate and aggregate spread rates was undertaken based on fundamental concepts, Austroads methods and local experience in Western Australia. Based on the above constraints and design issues, the 14 mm and 7 mm seal combination was adopted for the entire 30 km road network. Design and construction of the 14 mm primer seal and 7 mm single/single seal and the performance of this combination are described in detail in this paper.

• Record URL:
  • http://arrbknowledge.com
• Authors:
  • CHAKRABARTI, S
  • Foulsham, D
• Conference:
  • ARRB Conference, 26th, 2014, Sydney, New South Wales, Australia
• Publication Date: 2014-10

Language

• English

Media Info

• Pagination: 10p
• Serial:
  • Issue Number: 1.1

Subject/Index Terms

• TRT Terms: Binders; Heavy vehicles; Rural highways; Seal coats; Types of roads by network
• Uncontrolled Terms: Pavement technology; Road design and asset management; Road networks
• Geographic Terms: Australia; Western Australia
• ATRI Terms: Binder; Heavy vehicle; Road network; Rural road; Sprayed seal
• ITRD Terms: 1236: Lorry; 2775: Rural road; 2973: Sealing coat (on top of the surfacing)
• Subject Areas: Highways; Pavements; Vehicles and Equipment; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01547989
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, ATRI
• Created Date: Dec 17 2014 10:48AM