Implementation and thickness optimization of perpetual pavements in Ohio.

Details

• Creators:
  Sargand, Shad ; Khoury, Issam ; Jordan, Ben ; Scheer, Matthew ; Cichocki, Paul
• Corporate Creators:
  Ohio University. Ohio Research Institute for Transportation and the Environment (ORITE)
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Perpetual pavements
  • Pavement performance
  • Thickness
  • Optimization
  • Strain (Mechanics)
  • Pavement distress
  • Accelerated tests
  • Traffic loads
  • Service life
• Publication/ Report Number:
  FHWA/OH-2015/17
• Resource Type:
  Tech Report
• Geographical Coverage:
  Ohio
• Corporate Publisher:
  Ohio. Department of Transportation. Office of Statewide Planning and Research
• Abstract:
  This report documents the performance of perpetual pavement structures constructed by the Ohio Department of Transportation. ; Three perpetual pavement test sections on U.S. Route 23 in Delaware, Ohio (DEL-23) were constructed with AC thicknesses 11 in (28 cm), ; 13 in (33 cm), 15 in (38 cm) and instrumented to detect strains in Fatigue Resistant Layer (FRL) and base layers, deflections, temperatures, ; and subgrade pressures. Strains at bottom of FRL during Controlled Vehicle Load (CVL) testing in summer indicated the 13 in (33 cm) ; section on stabilized subgrade and 15 in (38 cm) section on compacted subgrade met perpetual criteria, while 11 in (28 cm) section on ; stabilized subgrade did not. Computer simulation of DEL-23 sections with PerRoad confirmed these findings, but also indicated the 11 in ; (28 cm) section would meet perpetual pavement criteria. ; Test pavements were built in the Accelerated Pavement Load Facility (APLF) and instrumented similarly to DEL-23. The sections ; were thinner, but included Highly Modified Asphalt (HiMA) with Kraton polymer binder in sections of depth 8 in (20 cm), 9 in (23 cm), 10 ; in (25 cm), and 11 in (28 cm), the last using conventional asphalt in the base as a control with HiMA in upper layers. There was no FRL. ; The 10 in (25 cm) and 11 in (28 cm) sections met perpetual criteria even when heated through to 100F (37.8C). After enduring 10,000 ; passes of 9000 lb (40 kN) load at 5 mph (8 km/h), the surface rutting was measured with a profilometer and was considerably below even ; the ODOT threshold for “low rutting” (0.125 in or 0.32 cm). An extrapolation of the curve fit suggested the HiMA surface would remain ; under the low rutting threshold much longer than conventional or WMA surfaces. Note these sections were built under ideal conditions, so ; field experience may differ. ; Fatigue endurance limit was computed using parameters measured in the laboratory asphalt mixture performance tester from samples ; collected from DEL-23 and APLF. Endurance limits computed following the NCHRP Project 9-44A method and MEPDG guide (E0=E*) ; provided a good fit with field results. ; Ten high-performing existing AC pavements from a previous forensic study (Sargand and Edwards, 2010) were further evaluated as ; potential perpetual pavements. Follow-up field investigations at each site included distress surveys, falling weight deflectometer (FWD) ; measurements, dynamic cone penetrometer (DCP) data, and Portable Seismic Property Analyzer (PSPA) measurements. Strains at the ; bottom of the asphalt were back calculated from FWD deflections using the elastic modulus program Evercalc. AC cores were collected ; and tested for indirect tensile strength and resilient modulus. The pavements were modeled using finite element software Abaqus, which ; confirmed the Evercalc strain computations. Of the ten pavements, seven appeared to meet conservative perpetual pavement strain criteria, ; one could be upgraded to meet perpetual pavement criteria by adding an additional asphalt layer, and two clearly did not meet perpetual ; pavement standards. A brief report on the status of previous perpetual pavement designs built in Stark County (STA-77) and Wayne ; County (WAY-30) is given.
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• Format:
  PDF
• Funding:
  State Job No. 465970
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29355/dot_29355_DS1.pdf
• File Type:
  [PDF - 11.59 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:ab42625a5a204e28755a4bb83485d35f57c1790a21cc71e78a8a3d8237e5a3545e572c2425b2ca17ff83561ea81721c813c2f491fd3622f3c1dc9e8c29027a86