The results of a laboratory investigation of cold-mixed asphalt-emulsion-treated mixtures used for black bases are reported. The tensile properties for several mix variables and test temperatures were evaluated by the indirect tensile test. One type of asphalt emulsion and two types of aggregate were used. Two asphalt-emulsion contents and two initially added moisture contents were used. Specimens were cured at two curing conditions to represent early and long-term field curing. The relationships between load and horizontal deformation and between vertical and horizontal deformation were recorded during the test on X-Y recorders. The indirect tensile properties evaluated included indirect tensile strength, Poisson's ratio, indirect tensile stiffness, total strain at failure, and indirect tensile index. The indirect tensile index is represented by the secant modulus of the load versus horizontal deformation curve. Other parameters evaluated included compactability (unit weight after compaction), unit weight at time of testing, and percentages of retained moisture and voids at time of testing. The indirect tensile properties of the mixtures were very sensitive to the test temperature and were also affected by the other factors included in the study. In most cases, the interactions of the different factors had significant effects on the mixture properties. The indirect tensile index provided a high correlation with the asphalt-emulsion content, the type of aggregate, and the test temperature and proved to be a better mixture-characterization factor than the indirect tensile stiffness. (Authors)

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 99-105
  • Monograph Title: Mechanics of track support, piles and geotechnical data
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00315307
  • Record Type: Publication
  • ISBN: 0309029880
  • Files: TRIS, TRB
  • Created Date: Sep 16 1980 12:00AM