Impact of gradation and moisture content on stiffness parameters of base materials : final report.

Details

• Creators:
  Tamrakar, Prajwol ; Nazarian, Soheil
• Corporate Creators:
  University of Texas at El Paso
• Corporate Contributors:
  Rutgers University. Center for Advanced Infrastructure and Transportation ; Texas. Dept. of Transportation ; United States. Department of Transportation. Research and Innovative Technology Administration ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Flexible pavements
  • Pavement layers
  • Base course (Pavements)
  • Aggregate gradation
  • Testing
  • Experiments
  • Paving materials
  • Flexible pavement
  • unbound granular base
  • fines content
  More +
• Publication/ Report Number:
  CAIT-UTC-054
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Rutgers University. Center for Advanced Infrastructure and Transportation
• Abstract:
  The performance of flexible pavement depends on the mechanical characteristics of its base layer. The mechanical ; characteristics such as stiffness and deformation resistance depend on many factors such as the material gradation ; fines content, moisture content, physical properties of coarse aggregate and more. The gradation of material could ; change due to improper material handling, migration of fines from subgrade and the other reasons. Similarly, ; the moisture content of base materials may alter during pavement construction and operation by exposure to ; excessive water and percolation of rainwater from pavement surface. In this research, the roles of gradation, fines ; content and moisture content were evaluated to understand the effects on the mechanical characteristics of base. ; Twelve different tests sequences were performed with a combination of moisture contents from dry to wet of ; optimum moisture content and fine contents. The increase in moisture content typically had detrimental effect on ; the mechanical characteristics of the base material. However, the increase in fines (change in gradation) showed ; mixed results on the mechanical characteristics.
  More +
• Format:
  PDF
• Funding:
  DTRT12-G-UTC16
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/31800/dot_31800_DS1.pdf
• File Type:
  [PDF - 2.54 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:9b439703a8ab3086bf10e5ae531a4317c48204a00ac695af8ad7ab46c2886840