A Case Study: Quantification and Modeling of Asphalt Overlay Delamination on an Airport Pavement

An international airport in southern Africa is experiencing premature asphalt surface distress; crescent shaped cracks appeared on the taxiway, one of the threshold areas on the runway and turning circle. Investigations into the cause and mechanism of distress indicated that delamination of the overlaid surfacing is the main cause of the crescent shaped cracks. Investigations confirmed that construction in periods of wet weather, a flat geometry and dysfunctional surface drainage coupled with an ageing porous surface layer caused stripping and delamination of the top 50 mm asphalt overlay which then showed crescent cracks due to aircraft braking and low speed turning maneuvers. A mechanistic analysis with a multilayered elastic analysis freeware was used to model the horizontal shear forces for the design aircraft with various levels of interlayer slip. The strain energy of distortion (SED) principle was used to model and predict the crescent shaped crack formation.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780415871990
• Supplemental Notes:
  • Abstract reprinted with permission of Taylor & Francis.
• Corporate Authors:

  CRC Press/Balkema

  P.O. Box 447
  2300 AK Leiden,   Netherlands 
• Authors:
  • Horak, Emile
  • Maina, James W
  • Emery, S E
• Conference:
  • Bearing Capacity of Roads, Railways and Airfields. 8th International Conference (BCR2A'09)
  • Location: Champaign IL, United States
  • Date: 2009-6-29 to 2009-7-2
• Publication Date: 2009

Language

• English

Media Info

• Media Type: Web
• Edition: e-book ISBN 9780203865286
• Features: Figures; References; Tables;
• Pagination: pp 1475-1483
• Monograph Title: Bearing Capacity of Roads, Railways and Airfields. Proceedings of the 8th International BCR2A'09 Conference

Subject/Index Terms

• TRT Terms: Airport runways; Bearing capacity; Bituminous overlays; Construction and maintenance; Cracking of asphalt concrete pavements; Delamination; Mathematical models; Overlays (Pavements); Pavement distress; Pavement layers; Shear strength; Surface course (Pavements); Taxiways; Traffic loads
• Uncontrolled Terms: Strain energy of distortion
• Geographic Terms: Africa
• Subject Areas: Aviation; Maintenance and Preservation; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 01350732
• Record Type: Publication
• ISBN: 9780415871990
• Files: TRIS
• Created Date: Aug 30 2011 11:08AM