Performance of chip seals using local and minimally processed aggregates for preservation of low traffic volume roadways.

Details

• Creators:
  Shuler, Scott
• Corporate Creators:
  Colorado State University
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Pavement maintenance
  • Chip seals
  • Aggregates
  • Preservation
  • Low volume roads
  • Pavement performance
  • Feasibility analysis
  • Benefit cost analysis
  • Condition surveys
  • Local materials
• Publication/ Report Number:
  CDOT-2013-7
• Resource Type:
  Tech Report
• Geographical Coverage:
  Colorado
• Corporate Publisher:
  Colorado. Dept. of Transportation. Research Branch
• NTL Classification:
  NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance ; NTL-HIGHWAY/ROAD TRANSPORTATION-Construction and Maintenance
• Abstract:
  This report documents the performance of two low traffic volume experimental chip seals constructed using ; locally available, minimally processed sand and gravel aggregates after four winters of service. The projects ; were constructed by CDOT maintenance personnel during the summer of 2009 using two sources of aggregate. ; These aggregates consisted of locally available products representing 1) materials routinely utilized and 2) ; materials that were marginal with respect to aggregate gradation and crushing requirements. An objective of ; this work was to evaluate the feasibility and cost/benefit of using aggregates in chip seals of lower quality than ; normally used with respect to gradation on low volume roadways. Because the cost of transporting high quality ; aggregates from front range sand and gravel and quarry locations to the eastern regions of Colorado is high and ; much of the pavement preservation activities in eastern Colorado are on low volume roadways, utilizing locally ; available aggregates would provide economic benefits if acceptable performance were demonstrated. ; After four winters and three summers service both experimental chip seals are performing well. Condition ; surveys of each pavement were conducted after each winter and summer to document pavement condition. ; Results indicate that pavement distress is in the form of longitudinal and transverse cracking and localized ; flushing due to non-uniform asphalt emulsion application during construction. Based on results from the last ; condition survey, both test pavements should perform acceptably for the next several years assuming no ; significant change in traffic levels. No significant differences were measured in performance for any of the ; evaluation sections.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26265/dot_26265_DS1.pdf
• File Type:
  [PDF - 2.36 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:edd463eb48bf1a0c8492a875d7053f91a10fa262dde7d91a7104de808aef4ae0