Development of improved overlay thickness design alternatives for local roads.

Details

• Creators:
  Tutumluer, Erol ; Sarker, Priyanka
• Corporate Creators:
  Illinois Center for Transportation
• Corporate Contributors:
  United States. Federal Highway Administration ; Illinois. Department of Transportation. Bureau of Materials and Physical Research
• Subject/TRT Terms:
  • Falling weight deflectometers
  • Hot mix asphalt
  • Overlays (Pavements)
  • Thickness
  • Low volume roads
  • Nondestructive tests
  • Mechanistic-empirical pavement design
  • Structural analysis
• Publication/ Report Number:
  FHWA-ICT-15-008;UILU-ENG-2015-2009
• Resource Type:
  Tech Report
• Geographical Coverage:
  Illinois
• Corporate Publisher:
  Illinois Center for Transportation
• Abstract:
  In this research study, 20 pavement sections were selected from six counties in Illinois, with varying ; structural and traffic characteristics. Falling weight deflectometer (FWD) tests were conducted on these ; road segments to determine and monitor the structural conditions of both the existing and HMA overlaid ; pavement sections. Then the corresponding required overlay thicknesses were determined using three ; different methods—the AASHTO 1993 nondestructive testing (NDT) method, the IDOT modified layer ; coefficients method, and the Asphalt Institute deflection approach—that are currently used by local ; agencies including municipalities, counties and townships. Inadequacies of the currently available ; methods to properly account for the pavement structural conditions were highlighted. Accordingly, a new ; mechanistic-empirical (M-E) overlay design method was developed to adequately assess the structural ; conditions of existing pavements and subsequently recommend required thickness values from FWD-based critical pavement responses computed and compared with threshold values for the pre-established fatigue and/or rutting damage algorithms. The M-E overlay design method successfully ; identified structural deficiencies in the original pavement configurations through FWD NDT and ; subsequently resulted in reliable and cost-effective overlay solutions, as compared with the IDOT ; modified layer coefficients method.
  More +
• Format:
  PDF
• Funding:
  R27-130
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29381/dot_29381_DS1.pdf
• File Type:
  [PDF - 4.79 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:ceecaad7e5cdd8474b6ad93d6a70a4a1caad964d56315ccd23c2d6b2d7d52fecbb327dbb40c4fde53d56cf1e95744482129d157d53951f23360707f9f96543ab