Hot Bituminous Pavement Gradation Acceptance Review of QC/QA Data 2000 Through 2003

Details

• Creators:
  Chavez, Eric
• Corporate Creators:
  Colorado. Department of Transportation
• Corporate Contributors:
  United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Quality assurance
  • Quality control
  • Standard deviation
  • Incentives
  • Asphalt content
  • Mat foundations
  • Joint construction
  • Bituminous materials
  • Aggregate gradation
  • quality levels
  More +
• Publication/ Report Number:
  CDOT-DTD-R-2005-7
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Colorado
• Edition:
  Final Report
• Corporate Publisher:
  Colorado. Department of Transportation
• Abstract:
  This report analyzes the Quality Control/Quality Assurance (QC/QA) data for hot bituminous pavements using gradation acceptance awarded in the years 2000 through 2003. Analysis of the overall project performance is accomplished by reviewing the Calculated Pay Factor Composite (CPFC) and Incentive/Disincentive Payments (I/DP)calculations. A detailed analysis of each of the test elements: mat density, percent asphalt, gradation, and joint density is also presented in tables, figures, and sub-reports. Various data groupings are used to evaluate the data including: year, region, & grading. Continued improvements can be measured in the hot bituminous pavement in the years 2000 through 2003. When evaluating the overall results for the projects, by reviewing the Calculated Pay Factor Composite, there is a 0.006improvement. Improvements in each of the test elements can also be measured. The mat density element has shown an improvement in quality levels of 2.06% over the four-year time period. Percent asphalt has increased by 2.70% and the gradation element has shown the best improvement measured at 4.15%. The mat density element has the best reported quality levels. Next best quality levels are in the percent asphalt element. The gradation element continues to rank last in quality levels but has seen the best improvement since 2000. Improvements can also be measured when evaluating the mixes by grading. Each of the elements has shown improvements in quality levels when evaluated by grading with the exception for grading S in the mat density element which shows a slight decrease in quality levels over the four-year time period. Overall grading SX has shown better test results as compared to grading S in each year when reviewing the Calculated Pay Factor Composite. The results for the joint density element after one year are about neutral. About the same number of projects are receiving incentive payments as are receiving disincentive payments on this element.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/93208/dot_93208_DS1.pdf
• File Type:
  [PDF - 4.95 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:3ab5ad3c759b845a800d346f1d428c6471ca37d708819c01e8a2512761903f3eb2de84cc47a6d325380a2de45b1c8a2277389f2588bc7366902aabc0abd4f592