Develop Rapid Quality Control and Assurance Technologies for Pavements: Phase II Report

This project expanded on the technology readiness of three non-destructive tools for potentially enhancing quality inspection, asset management, or forensic investigations in flexible pavements. These tools included mechanics-based models for base course, compaction monitoring system (CMS) for asphalt mixture process control, and ground penetrating radar (GPR) for asphalt mixture construction quality assessment. The mechanics-based models showed good promise for measuring density and moisture content of the base course. Results showed estimating flexible base course modulus at a controlled test site tracked reasonably with the falling weight deflectometer (FWD) with an average error of about 14 ksi or less. The mechanics-based models did not work well on non-plastic base layers. On new pavements, the FWD shows more variability than the modulus predictions from mechanics-based results. The CMS provides real-time feedback of the adequacy of breakdown roller coverage, but the concept to estimate mat density from the CMS proved quite complex. Even after development of revised model factors, the ability of the CMS to estimate density is limited. The best potential use of the CMS is likely in process control to provide continuous feedback with far more testing coverage than routine use of a density gauge. The use of GPR for measuring asphalt mixture density has a high technology readiness. Applications in both construction and forensic settings show strong potential, and this tool should be viable for some form of implementation.

• Record URL:
  https://static.tti.tamu.edu/tti.tamu.edu/documents/0-6874-R2.pdf
• 
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/60828
• Corporate Authors:

  Texas A&M Transportation Institute

  College Station, TX  United States 

  Texas Department of Transportation

  Research and Technology Implementation Office
  125 E 11th Street
  Austin, TX  United States  78701-2483

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Crockford, Bill
  • Deng, Yong
  • Devadas, Arvind
  • Gu, Fan
  • Im, Soohyok
  • Joshaghani, Alireza
  • Liu, Wenting
  • Luo, Xue
  • Lytton, Bob
  • Rew, Younho
  • Saha, Sajib
  • Sebesta, Stephen
  • Wilson, Bryan
• Publication Date: 2021-9

Language

• English

Media Info

• Media Type: Digital/other
• Features: Appendices; Figures; Photos; Tables;
• Pagination: 108p

Subject/Index Terms

• TRT Terms: Compaction; Density; Falling weight deflectometers; Flexible pavements; Ground penetrating radar; Quality control
• Subject Areas: Construction; Highways; Pavements;

Filing Info

• Accession Number: 01784718
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-21/0-6874-R2, 0-6874-R2
• Contract Numbers: 0-6874
• Files: NTL, TRIS, ATRI, USDOT, STATEDOT
• Created Date: Oct 14 2021 5:18PM