A Study on Repair Design Method of Porous Asphalt for the Japanese Motorways

Porous asphalt has been widely used as standard road surface for the nationwide toll motorways in Japan. However it is difficult to appropriately estimate structural condition only from outlook of its road surface, since unfamiliar binder-layer-based distress takes place suddenly and intermittently several years in service. Before getting into this final life stage, an efficient and non-destructive method that can accurately evaluate structurally damaged layers has been strongly needed. Because there is some unforced mathematical error in back-calculation, which affects accuracy of the evaluation, deflection basin parameter was applied as structurally distress index in this study. In order to clarify the relation between the deflection basin parameter and bituminous layers’ distress condition, cores were sampled from the falling weight deflectometers (FWD) loading points and subjected to laboratory mechanistic tests. It was found that damaged and sound cores are distinguishable in a relation between bituminous cores’ thickness and a deflection basin index (D0-D900) divided by cores thickness. Because it was also found that decrease of this index goes with the increase of indirect tensile strength of binder layer’s mix, it is speculated that the index can be used to appropriately determine repair thickness by setting mix criteria for identifying to replace with new materials.

• Availability:
  • Find a library where document is available. Order URL: http://www.crcpress.com/product/isbn/9780415621359
• Supplemental Notes:
  • Abstract reprinted with permission from Taylor and Francis.
• Corporate Authors:

  CRC Press/Balkema

  P.O. Box 447
  2300 AK Leiden,   Netherlands 
• Authors:
  • Kamiya, K
  • Kazato, T
• Conference:
  • 2nd International Conference on Transportation Geotechnics (ICTG)
  • Location: Hokkaido , Japan
  • Date: 2012-9-10 to 2012-9-12
• Publication Date: 2012

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: pp 854-859
• Monograph Title: Advances in Transportation Geotechnics II

Subject/Index Terms

• TRT Terms: Deflection; Mix design; Pavement distress; Pavement maintenance; Porous materials; Tensile strength
• Geographic Terms: Japan
• Subject Areas: Highways; Maintenance and Preservation; Pavements; I60: Maintenance;

Filing Info

• Accession Number: 01473395
• Record Type: Publication
• ISBN: 9780415621359
• Files: TRIS
• Created Date: Feb 21 2013 9:11AM