Effectiveness of two reflection crack attenuation techniques.

Details

• Creators:
  Shuler, Scott
• Corporate Creators:
  Colorado State University
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Reflection cracking
  • Bituminous overlays
  • Pavement interlayers
  • Asphalt pavements
  • Concrete pavements
  • Pavement distress
  • Subbase (Pavements)
  • Subgrade (Pavements)
  • Service life
• Publication/ Report Number:
  CDOT-2015-10
• Resource Type:
  Tech Report
• Geographical Coverage:
  Colorado
• Corporate Publisher:
  Colorado. Dept. of Transportation. Applied Research and Innovation Branch
• Abstract:
  Asphalt overlays are one of the most common tools for rehabilitating existing asphalt and concrete pavements. ; However, the performance of new overlays is often jeopardized by the cracking distress in the existing ; pavement. This existing cracking propagates, or reflects, through the new overlay to the surface of the new ; overlay. The rate at which this reflection cracking propagates to the surface is a function of overlay thickness, ; crack severity, traffic loading and subgrade or subbase support. Once reflection cracks appear on the surface ; of the new pavement, water and debris can enter the subbase and subgrade which can affect pavement strength ; and reduce the life of the overlay. Therefore, reducing the rate at which these reflection cracks propagate to ; the surface of the pavement is desirable in order to lengthen the time between rehabilitation projects or crack ; sealing operations. ; Various methods have been used in past decades in an attempt to reduce the rate of reflection crack ; propagation. These include geosynthetic membranes and asphalt stress absorbing interlayers. ; This study compares performance of a grid reinforcing system, a polymer modified asphalt-rich interlayer ; system and control pavement test sections. ; After five years of performance monitoring differences between the attenuation systems and the controls have ; appeared.
  More +
• Format:
  PDF
• Funding:
  CDOT-DTD-R-2015-10
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29513/dot_29513_DS1.pdf
• File Type:
  [PDF - 827.67 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:4a23bc5c625dae7358caadda89817785b145d0dbffa6570eebc1e1317690925b