Resilient Modulus at the Limits of Gradation and Varying Degrees of Saturation

Details

• Creators:
  Hodek, Ralph J.{44756} ; Mayrberger, Torsten
• Corporate Creators:
  Michigan Technological University. Dept. of Civil and Environmental Engineering
• Corporate Contributors:
  Michigan. Dept. of Transportation. Construction and Technology Division ; Michigan Tech Transportation Institute
• Subject/TRT Terms:
  • Aggregate gradation
  • Base course (Pavements)
  • Granular materials
  • Modulus of resilience
  • Moisture content
  • Percent saturation
  • Quality control
  • Stiffness
  • Highways
  • Materials
  More +
• Publication/ Report Number:
  RC -1497
• Resource Type:
  Tech Report
• Geographical Coverage:
  Michigan ; United States
• TRIS Online Accession Number:
  01115029
• Edition:
  Final Report
• Corporate Publisher:
  Michigan. Dept. of Transportation. Construction and Technology Division
• Abstract:
  This report details a laboratory study which was intended to evaluate the 4G aggregate specification as a quality control specification. The study variables were the gradation, the material, and the moisture condition. The characteristic to be controlled was the stiffness, and the stiffness of each compacted unbound granular material was measured by the resilient modulus. Findings showed that the stiffness is dependent on material type. As a generalization, natural gravel is always softest, dolomite and slag behave similarly and are stiffest, and crushed concrete occupies an intermediate position. The stiffness is also dependent upon the ratio of fine to coarse aggregate within the specification. As the ratio increases, the material’s compacted stiffness decreases. Significant stiffness differences occur within the limits of the 4G specification band; stiffnesses could vary by up to 50%. For every material type it was also observed that the effect of moisture content increases as the ratio of fine to coarse fraction increases. An increase in moisture content was shown to decrease stiffness.
• Format:
  PDF
• Funding:
  03-0063
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/37976/dot_37976_DS1.pdf
• File Type:
  [PDF - 1.98 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:0a4cefb17bf11b6991873979139dd93d4be47320598bd25dc7003371bd7d9f74