Evaluation of coronus pavement materials

Coral derived aggregates may largely be described by the general adjectives coronus (a pidgin derived melanesian term) or coralline. Such a broad grouping does not allow for the high degree of variability encountered in coral derived deposits. The pavement related properties or coronus deposits are primarily determined by the coral type, fragment shape, degree of recrystallisation and induration, degree of weathering and level of contamination by plastic fines. Coronus aggregates vary from being hard and equiaxed with a small proportion of plastic fines to being soft and flakey with a high level of clayey material. The paper describes the investigation of selected coronus borrow pits throughout papua new guinea to determine simple and reliable means of evaluating the potential of a coronus pit as a pavement aggregate source. Routine aggregate tests are evaluated as a means of determining basic properties while triaxial testing is used to identify any propensity of the coronus material for self cementation. Polished aggregate friction values were determined to evaluate any potential for use as a surfacing aggregate. The investigation results suggest that behaviour of coronus materials may be predicted once level and nature of fines and porosity is determined. It was also determined that coronus aggregates are ideally suited for use on lightly trafficked roads where degradation due to mechanical wear is minimised (a).

• Record URL:
  http://arrbknowledge.com
• Authors:
  • Bullen, F
  • Heaton, B S
• Conference:
  • Australian Road Research Board (ARRB) Conference, 13th, 1986, Adelaide, Australia
• Publication Date: 1986

Language

• English

Media Info

• Pagination: 63-75
• Monograph Title: Study on bitumen with a view to improving road surfacing
• Serial:
  • Volume: 13
  • Issue Number: 3

Subject/Index Terms

• TRT Terms: Aggregates; California bearing ratio; Deterioration; Durability; Materials tests; Particles; Pavement components; Plastic limit; Plasticity; Properties of materials; Skid resistance; Strength of materials
• ATRI Terms: Aggregate; California bearing ratio; Density; Deterioration; Durability; Material properties; Material testing; Particle size distribution; Pavement materials; Plastic limit; Plasticity; Skidding resistance; Strength
• Subject Areas: Geotechnology; Highways; Materials; Pavements;

Filing Info

• Accession Number: 01427379
• Record Type: Publication
• Source Agency: ARRB
• Files: ATRI
• Created Date: Aug 24 2012 2:16PM