In-place voids monitoring of hot mix asphalt pavements : follow-up.

Details

• Creators:
  Griffin, Richard
• Corporate Creators:
  Colorado. Dept. of Transportation. Research Branch
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Hot mix paving mixtures
  • Air voids
  • Cores (Specimens)
  • Asphalt cement
  • Compaction
  • Mix design
  • Mineral aggregates
• Publication/ Report Number:
  CDOT-2013-19
• Resource Type:
  Tech Report
• Geographical Coverage:
  Colorado
• Corporate Publisher:
  Colorado. Dept. of Transportation. Research Branch
• Abstract:
  In order to validate the policy of allowing the adjustment of the asphalt cement to reduce the laboratory ; air voids up to one percent, cores were taken over a period of four years on 19 paving projects and ; tested for air voids. After being compacted by traffic over several years, the average air voids in these ; pavements were 3.8%. Since the design air voids are required to be between 3.5% and 4.5%, the ; monitoring validates the effectiveness of the policy. However, there was significant scatter in the data ; with most of the in-place voids falling out of this design range. ; Implementation ; The asphalt cement adjustment policy has been validated, but more guidance needs to be developed to ; reduce scatter. CDOT should consider additional guidance in making AC adjustments to achieve more ; consistent in-place voids. Forensic analysis of any pavement showing premature failure related to mix ; problems may help in developing and fine-tuning this guidance.
  More +
• Format:
  PDF
• Funding:
  12.92
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26885/dot_26885_DS1.pdf
• File Type:
  [PDF - 254.77 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:84bf218b00f81657817b9fec97a0922a108065fe1ab284f2bc5a72f6f4952676