Research is reported that was designed to determine the probable causes of low densities obtained during construction of bituminous surface courses designed with slag aggregate, and to determine the effect of low densities on the performance and durability of in-service bituminous surface course throughout Tennessee. The research literature in this field is reviewed and the causes of low density are examined. The probable primary causes of low densities in bituminous surface courses were found to be the lack of rolling in the breakdown and intermediate rolling sequencies, the low mat temperatures during rolling operations, and the asphalt contents below the design asphalt content. The effect of density on surface performance is discussed and tables are presented of record densities, core densities and ratings from field inspections. As a result of this project more widespread use is being made of nuclear density surface gauges. A large number of tests may be conducted in a short time after laydown and rolling operations and a closer quality control of paving operations may be maintained.

  • Supplemental Notes:
    • Proceedings of the 55th Annual Tennessee Highway Conference, 1973.
  • Corporate Authors:

    University of Tennessee, Knoxville

    Engineering Experiment Station
    Knoxville, TN  United States  37916
  • Authors:
    • Marks, B D
    • Ford, H O
  • Publication Date: 1974-1

Media Info

  • Features: Figures; References;

Subject/Index Terms

Filing Info

  • Accession Number: 00264754
  • Record Type: Publication
  • Report/Paper Numbers: Bulletin No. 40 Proceeding
  • Files: TRIS
  • Created Date: Jan 29 2000 12:00AM