Density Profiling of Asphalt Pavements

Details

• Creators:
  Shuler, Scott
• Corporate Creators:
  Colorado State University
• Corporate Contributors:
  Colorado. Department of Transportation ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Aggregate segregation
  • Nuclear tests
  • Nondestructive tests
  • Asphalt pavements
  • Density
  • Electrical resistivity
  • Nuclear density gages
  • Quality control
  • Road construction
  • Statistical analysis
  More +
• Publication/ Report Number:
  CDOT-DTD-R-2005-6
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Colorado
• Edition:
  Final Report
• Corporate Publisher:
  Colorado. Department of Transportation
• Abstract:
  Asphalt pavement density measurements were made using a conventional nuclear density gauge and a new electrical resistivity device called the "Pavement Quality Indicator." Five sets of density tests were made at each of nine sites during, or immediately following paving operations between July and September, 2004. Testing at each site attempted to capture differences in density caused by segregation under five distinct sets of circumstances. These included strip segregation along the centerline created by the auger gearbox of the paver, other visible segregation caused by practices such as truck dumping practices and hopper wing folding, transverse segregation caused by inherent design configurations of the paver including the slat conveyor system, screed extensions and stopping of the paver. Control sections were included where segregation was not visible during construction. Tests were conducted at random for each data set and replicated so that rigorous statistical analysis could be conducted. Results indicate that for the "strip" and "visible" data sets, an average decrease in density apparently occurs in the location of the segregation when all nine sites are included in the analysis. However, variability of the density data for all nine sites was very high. This variability is likely related to the differences in segregation occurring at each site. For example, some sites had noticeable segregation during construction while other sites had only minor segregation. To reduce this variability, further analysis of the data should be conducted after the sites are grouped according to the severity of the segregation present.
• Format:
  PDF
• Funding:
  OE HAA 04HQ0000271
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/93201/dot_93201_DS1.pdf
• File Type:
  [PDF - 3.25 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:fa35e93a1f2d5989d991455113dafd9a53f8e1ba4a805534f9130405dcabcf9f19831b35817d90199bb54a97201711a6690b6dd87a4fa0d07ccfe26108dd4e30