Continued Monitoring of Indiana's SPS9-A Site

Details

• Creators:
  Shah, Ayesha ; McDaniel, Rebecca S. ; Olek, Jan
• Corporate Creators:
  Purdue University. Joint Transportation Research Program
• Corporate Contributors:
  Indiana Department of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Pavement cracking
  • Transverse cracking
  • Cracking of concrete pavements
  • Concrete pavements
  • Pavements
  • Binders
  • Testing
  • SPS9-A
  • Long-term performance
  • Pavement monitoring
  More +
• Publication/ Report Number:
  FHWA/IN/JTRP-2012/19
• Resource Type:
  Research Paper
• Geographical Coverage:
  Indiana
• Edition:
  Final report.
• Corporate Publisher:
  Purdue University. Joint Transportation Research Program
• Abstract:
  This study was initiated to continue monitoring the performance of five test sections placed in 1997 to compare the performance of ; Superpave asphalt mixtures with different binder grades and one test section designed using the Marshall mix design method. A ; previous study had evaluated the performance of these test sections for four years after construction. This study extended that ; evaluation period to 12 years. During that time period, cores were taken from each test section at 9.5 and 12 years in service. Cores ; were tested and analyzed to determine the volumetrics and low temperature cracking behavior of the mixtures. Additional cores were ; used to extract, recover and test the binder in the mixtures. Results showed that the air void content in the mixtures did continue to ; decrease up to about nine years then appears to have leveled off. Aging (stiffening) of the unmodified binders was observed through ; Dynamic Shear Rheometer testing of the recovered binders but not by the penetration test. The modified binder did not exhibit the ; same level of aging as the unmodified binders. Aging also affected the recovered low temperature binder grade of four of the six ; binders, but the other two seemed relatively insensitive to aging at low temperatures. Testing of field cores showed that all of the ; mixtures would be expected to show thermal cracking at 9.5 years and beyond; this was confirmed by field distress surveys. The mix ; with polymer modified binder showed the greatest amount of cracking, which began at an early age in the field; this was not expected ; and did not correlate well with the lab testing results for unknown reasons. The mix with 15% RAP was slightly stiffer than a companion ; control mix without RAP, but the difference in predicted cracking temperature was only 1 ‐ 2°C for the surface mixes. Based on these ; results, INDOT can continue to use Superpave mixes with confidence, especially when considering the fact that Superpave has continued ; to evolve and be refined since this project was constructed. The mixture with RAP has performed about as well as the virgin mixtures ; under heavy interstate traffic.
  More +
• Format:
  PDF
• Funding:
  SPR-3017
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/25214/dot_25214_DS1.pdf
• File Type:
  [PDF - 8.61 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:ac06b8b3219275bae505e24eb1a2a07d2be02348e4aa68a98a93ffa494f075d2