THE REDESIGN OF THE ADELAIDE GRAND PRIX SURFACE MIX USING THE GYROPAC

The paper reports on the utilisation of the Australian version of a gyratory compactor, the Gyropac, to redesign the wearing course of the AdelaideGrand Prix mix. Following the initial mix design in 1985, several factors including traction problems highlighted by bad weather and component variation over time were responsible for the redesign of the mix. An additional factor in the redesign was the need to counteract the rutting potential of O-Bahn bus traffic. Using the Gyropac as the prime specimen preparation tool, experiments were carried out in the volumetric design stage to find out the effect of compaction (represented by Gyropac cycles) and the sensitivity to component variation at construction, post-compaction and refusal density. From the experiments, a target grading was determined and small plant trials carried out to adjust the plant in order to deliver the targeted grading and gauge laboratory to plant differences. This was followed by a larger plant trial where the final binder content and the construction roller pattern were determined. The Gyropac was used to prepare samples for mechanical property testing such as modulus, creep and tensile strength, including those from all the trials. Compaction comparisons weremade to Marshall specimens prepared at the plant as part of the trials. (a) For the covering abstract of this conference see IRRD abstract no. 861222.

• Record URL:
  http://arrbknowledge.com
• Corporate Authors:

  ARRB

  Melbourne, Victoria  Australia 
• Authors:
  • Butcher, M J
  • LORENZ, M A
• Conference:
  • 17TH ARRB CONFERENCE, GOLD COAST, QUEENSLAND, 15-19 AUGUST 1994; PROCEEDINGS; VOLUME 17, PART 3
• Publication Date: 1994

Language

• English

Media Info

• Features: References;
• Pagination: p. 267-82

Subject/Index Terms

• TRT Terms: Binders; Building materials; Buses; Compaction; Compactors; Conferences; Flexible pavements; Laboratories; Mix design; Pavement design; Porosity; Race cars; Rutting; Tests; Wearing course (Pavements)
• Uncontrolled Terms: Gyratory compactors
• Geographic Terms: Australia
• ITRD Terms: 8006: Australia; 4948: Binder; 1272: Bus; 3686: Compaction; 8525: Conference; 2944: Flexible pavement; 6273: Gyratory compactor; 6237: Laboratory (not an organization); 4555: Material (constr); 4714: Mix design; 3055: Pavement design; 5938: Porosity; 1230: Racing car; 3081: Rutting (wheel); 6255: Test; 2980: Wearing course
• Subject Areas: Highways; Pavements; Public Transportation;

Filing Info

• Accession Number: 00669749
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, ATRI
• Created Date: Dec 23 1994 12:00AM