The findings of a study to evaluate the effects of soil-binder content on the behavior of blackbase mixtures used in Texas are summarized. The evaluation was based on a comparison and analysis of engineering properties, obtained by using the static and repeated-load indirect tensile tests, of mixtures with various soil-binder contents. For this study two blackbase mixtures, a rounded gravel with field sand and a crushed limestone, were investigated. Various engineering properties were evaluated at various soil-binder contents and asphalt contents. The engineering properties evaluated were tensile strength, static modulus of elasticity, fatigue life, and resilient modulus of elasticity. Most of the tests were conducted on air-dried specimens; however, a limited number of tests were conducted on pressure-wetted specimens to evaluate the influence of moisture content. Generally, the results indicate that the various engineering properties were maximized at relatively low soil-binder contents and at correspondingly lower asphalt contents. The optimum asphalt contents tended to decrease as the soil-binder content decreased. The optimum soil-binder contents for the various engineering properties ranged from 5 to 10 percent. (Author)

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 1-9
  • Monograph Title: Asphalt: materials, mixes and construction
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00334204
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 16 1981 12:00AM