Residual Strength of Full-Depth Reclamation

Details

• Creators:
  Torres-Machi, Cristina ; Beesam, Vishwa Vignan ; Galotti, Victor
• Corporate Creators:
  University of Colorado Boulder
• Corporate Contributors:
  Colorado. Department of Transportation. Applied Research & Innovations Branch ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Cold In-place Recycling Cost Effectiveness Full-depth Reclamation Long-term Performance Mechanistic-empirical Pavement Design Modulus Of Resilience Pavement Design Performance Roughness
• Publication/ Report Number:
  CDOT-2020-09
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Colorado
• Edition:
  Final Report
• Corporate Publisher:
  Colorado Department of Transportation. Applied Research & Innovations Branch
• Abstract:
  Cold recycling technologies such as Full-Depth Reclamation (FDR) are sustainable and cost-effective techniques for pavement rehabilitation. Previous research has found current mechanistic-empirical (M-E) default values to be non representative and overly conservative, leading to an underestimation of the true performance capabilities of FDR materials. To address this gap, this research analyzes the performance of 11 FDR sites constructed throughout Colorado and compares their long-term performance with M-E predictions. The objective of this report is to recommend input values for the M-E design of FDR base materials that result in reliable predictions of FDR long-term performance. Both initial values of the International Roughness Index (IRI) and resilient modulus were found to have a significant impact on M-E predictions and were calibrated in a two-step process. The proposed input parameters lead to a conservative design of FDR projects and result in improved IRI predictions than the ones derived from current design criteria. With the current design parameters, IRI predictions were on average overestimated by 51 in/ mile, whereas the proposed input parameters allow to reduce this difference to 17 in/mile. Future research is needed to improve current models in M-E pavement design software to adequately model cold-in-place recycled layers such as FDR.
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:8fd27a3197e75b6ed244b6144cb6697fc25d84424738144f6be20d18068e6c6e297639388ea348282cf9104a4a2a578cf2b03e50aa40da7b477bd40ab2a6f9eb
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/88630/dot_88630_DS1.pdf
• File Type:
  [PDF - 2.73 MB ]