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

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/DPs) 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, and 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 CPFC, there is a 0.006 improvement. 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 CPFC. 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.

Language

  • English

Media Info

  • Media Type: Print
  • Edition: Final Report
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 129p

Subject/Index Terms

Filing Info

  • Accession Number: 01001255
  • Record Type: Publication
  • Report/Paper Numbers: CDOT-DTD-R-2005-7
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Jun 24 2005 2:05PM