Crack Initiation Assessment of Wearing Course Mixtures Using Aggregate Skeleton Property

At normal service temperatures, wearing course asphalt mixtures may have ductile cracking. Aggregate skeleton is important to avoid the premature cracking. This study discusses a relationship between the aggregate skeleton property and crack resistance of wearing course mixtures. Asphalt mixture specimens were prepared using different types of aggregate skeleton. Notched semi circular bending test was conducted to obtain the critical J integral (Jc). The coarse aggregate ratio defined by the Bailey method was introduced to recognize the effect of aggregate skeleton type and Jc. The results showed that the Jc value decreases as the CA Ratio increases. It was proposed that limiting the CA Ratio not more than 0.4 might be useful to obtain HMA mixtures with a high Jc. This study also discussed spherical aggregates models as an aid to illustrate development of the aggregates interlocking, which influences to the cracking.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780874141597
• Corporate Authors:

  University of Iowa, Iowa City

  Department of Civil and Environmental Engineering
  Iowa City, IA  United States  52242
• Authors:
  • Haryanto, Iman
  • Takahashi, Osamu
• Conference:
  • Fifth International Conference on Maintenance and Rehabilitation of Pavements and Technological Control (MAIREPAV5)
  • Location: Park City UT
  • Date: 2007-8-8 to 2007-8-10
• Publication Date: 2007

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 235-240
• Monograph Title: International Conference on Maintenance and Rehabilitation of Pavements and Technological Control (MAIREPAV5), Fifth Proceedings

Subject/Index Terms

• TRT Terms: Aggregates; Asphalt mixtures; Cracking; Wearing course (Pavements)
• Uncontrolled Terms: Aggregate skeleton
• Subject Areas: Highways; Maintenance and Preservation; I60: Maintenance;

Filing Info

• Accession Number: 01130018
• Record Type: Publication
• ISBN: 9780874141597
• Files: TRIS
• Created Date: Jun 17 2009 12:07PM