Comparative evaluation of subgrade resilient modulus from non-destructive, in-situ, and laboratory methods.

Details

• Creators:
  Mohammad, Louay N. ; Gaspard, Kevin ; Herath, Ananda ; Nazzal, Munir
• Corporate Creators:
  Louisiana Transportation Research Center
• Corporate Contributors:
  United States. Federal Highway Administration. Office of Technology Applications ; Louisiana. Dept. of Transportation and Development
• Subject/TRT Terms:
  • Flexible pavements
  • Asphalt concrete pavements
  • Modulus of resilience
  • Asphalt tests
  • Testing equipment
  • Test procedures
  • Flexural strength
  • Pavement components
  • Load tests
  • Cone penetrometers
  More +
• Publication/ Report Number:
  FHWA/LA.06/417
• Resource Type:
  Tech Report
• Geographical Coverage:
  Louisiana
• Edition:
  Final report; 7/2003-3/2006.
• Corporate Publisher:
  Louisiana Transportation Research Center
• Abstract:
  Field and laboratory testing programs were conducted to develop models that predict the resilient modulus of subgrade soils from ; the test results of DCP, CIMCPT, FWD, Dynaflect, and soil properties. The field testing program included DCP, CIMCPT, FWD, ; and Dynaflect testing, whereas the laboratory program included repeated load triaxial resilient modulus tests and physical ; properties and compaction tests. Nine overlay rehabilitation pavement projects in Louisiana were selected. A total of four soil ; types (A-4, A-6, A-7-5, and A-7-6) were considered at different moisture-dry unit weight levels. The results of the laboratory and ; field testing programs were analyzed and critically evaluated. A comprehensive statistical analysis was conducted on the collected ; data. The results showed a good agreement between the predicted and measured resilient modulus from the various field test ; methods considered. The DCP and CIMCPT models were enhanced when the soil moisture content and dry unit weight were ; incorporated. The results also showed that, among all backcalculated FWD moduli, those backcalculated using ELMOD 5.1.69 ; software had the best correlation with the measured Mr. Finally, the Mr values estimated using the approach currently adopted by ; the LADOTD were found to correlate poorly with the measured Mr values.
  More +
• Format:
  PDF
• Funding:
  03-3P
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/22130/dot_22130_DS1.pdf
• File Type:
  [PDF - 878.16 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:6bf22ae979137ed51b7ab8120ebc78340c7484afdd010d701486337c6be340db8a2f8b0f3347b6a6f9fd67fa6648a7ed9029ecf145d8174913f89e3b5983a16c