The Effect of Varying the Modulus and Thickness of Asphaltic Concrete Surfacing Materials

Details

• Creators:
  Lu, Danny Y. ; Scrivner, Frank H.
• Corporate Creators:
  Texas Transportation Institute. Texas A&M University ; University of Texas at Austin. Center for Highway Research
• Corporate Contributors:
  Texas Highway Department ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Linear elasticity
  • Flexible pavements
  • Modulus of elasticity
  • Thickness
  • Asphalt concrete
  • Surfacing
• Publication/ Report Number:
  123-24
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Texas
• Edition:
  Interim - September 1971 - October 1974
• Corporate Publisher:
  Texas Transportation Institute. Texas A&M University ; University of Texas at Austin. Center for Highway Research
• Abstract:
  Presented in this report is a theoretical study of the effects of varying the modulus and thickness of asphalt concrete surfacing materials. Three typical flexible pavement design problems at two levels of hot mix asphaltic concrete (HMAC) elastic modulus are analyzed using linear elastic theory. Specific findings are: (1) the use of an HMAS modulus which is much higher than the base course modulus, is discouraged, (2) if a high HMAC - base course modular ratio cannot be avoided, then one should avoid the range from 1 inch to 6 inches of HMAC thickness, and (3) the softening of the base material immediately under the surface layer results in higher tensile stresses at the bottom of the surface layer, and accelerates fatigue deterioration of the pavement.
• Format:
  PDF
• Funding:
  1-8-69-123
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/81815/dot_81815_DS1.pdf
• File Type:
  [PDF - 1.49 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:944f4e954ac414b65fddd8cda77bff6cd5b81a30c45907c625b547a2b10f9f9e264dd93c9cfc42c0651724ad0cebd67d62162aa245768e182fc4e1b56437f1ae