Queensland trial of high standard granular base: TrackStar Alliance project: Year 4 - 2016/17

The widespread use of unbound granular pavements results from the relatively low initial capital investment requirements as compared to structures composed of asphalt or concrete pavements. However, the risk of premature distress development is greater for unbound granular structures, particularly when subjected to heavy load and high-volume traffic. In Queensland, they are traditionally used for low to medium traffic volume rural applications. Road pavements in urban and heavily trafficked areas are usually designed and constructed with thick asphalt base layers. Some other Australian states have successfully employed unbound highstandard granular (HSG) base with a sprayed seal surfacing for heavily trafficked rural highways, resulting in significant savings. Heavy-duty unbound granular pavements compare favourably, with respect to cost and performance, to concrete and deep strength asphalt pavements. The use of unbound HSG base in a high traffic volume semi-rural application is currently being demonstrated as part of the Centenary Motorway duplication between Springfield Parkway and the Logan Motorway interchange. A key component of the project was the enhanced protocol for compliance testing from both unbound granular stockpiles and the formed pavement. Evaluation and monitoring of the trial was undertaken to advance understanding of material selection, design, construction and quality control best practice for SG(HD) heavy-duty unbound granular pavement.

• Record URL:
  • http://nacoe.com.au/wp-content/uploads/2018/03/PRP16023_P15_QLD-Trial-of-High-Standard-Granular-Base-TrackStrar-Alliance-Project_Final.pdf
• 
• Corporate Authors:

  National Asset Centre of Excellence (NACOE)

  Brisbane, Queensland   
• Authors:
  • Lee, J
  • Griffin, J
  • Conaghan, A
• Publication Date: 2018-2

Media Info

• Pagination: 191p

Subject/Index Terms

• TRT Terms: Construction; Costs; Durability; Field studies; High volume roads; Highway design; Pavement performance; Road construction; Subgrade (Pavements)
• Geographic Terms: Queensland
• ATRI Terms: Construction costs; Durability; Field study; High traffic road; Pavement performance; Road construction; Road design; Subgrade
• Subject Areas: Construction; Highways;

Filing Info

• Accession Number: 01790644
• Record Type: Publication
• Source Agency: ARRB Group Limited
• Report/Paper Numbers: P15
• Files: ATRI
• Created Date: Dec 9 2021 9:53AM