Roughness Progression on KDOT Asphalt Pavements

Pavement smoothness is a major factor affecting performance. Since the introduction of the Superpave system in Kansas, bonus payment for asphalt pavement construction has increased significantly, indicating that these pavements are smoother. Initially, however, roughness (or lack of smoothness) progression on these pavements is yet to be determined. In this study, roughness of 17 pavement sections, built between 1998 and 2001 were analyzed. These sections were constructed over different subgrade and base types, and different asphalt binder aggregates were used. Annual roughness data was collected from the Pavement Management Information System database of the Kansas Department of Transportation. In addition, five new sections, built over the last three years, were also monitored. Roughness data on these sections were collected periodically. International Roughness Index (IRI) was used as the roughness statistic for analyzing both types of sections. The results show that Cold-In-Place-Recycled (CIPR) bases produce smoother Superpave pavements over time compared to crushed aggregate and asphalt concrete bases. Properties of the surface course mixture and the subgrade are the major factors that influence as-constructed roughness of Superpave pavements. Roughness progression trends show that there is a linear relationship between the short-term roughness and the as-constructed roughness. For the Superpave pavements that did not receive early maintenance intervention, the short-term roughness would be influenced by the age of the pavement and binder course mixture properties. The short-term roughness of a Superpave pavement is very sensitive to age and the surface course dust content.

  • Record URL:
  • Corporate Authors:

    Kansas State University, Manhattan

    Manhattan, KS  United States  66506

    Kansas Department of Transportation

    Bureau of Materials and Research, 700 SW Harrison Street
    Topeka, KS  United States  66603-3745
  • Authors:
    • Mulandi, J
    • Siddique, Zahidul
    • Hossain, Mustaque
    • Nelson, Paul I
  • Publication Date: 2007-4


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Figures; References; Tables;
  • Pagination: 118p

Subject/Index Terms

Filing Info

  • Accession Number: 01056135
  • Record Type: Publication
  • Report/Paper Numbers: K-TRAN: KSU-02-5, RE-0280-01
  • Contract Numbers: C1380
  • Created Date: Aug 29 2007 12:51PM