Assessment of non-destructive testing technologies for quality control/quality assurance of asphalt mixtures.

Details

• Creators:
  Lin, Shibin ; Ashlock, Jeramy C. ; Kim, Hanjun ; Nash, Jeremy ; Lee, Hosin ; Williams, R. Christopher
• Corporate Creators:
  Iowa State University. Institute for Transportation
• Corporate Contributors:
  Iowa. Dept. of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Asphalt mixtures
  • Quality control
  • Quality assurance
  • Nondestructive tests
  • Field tests
  • Laboratory tests
  • Density
  • Stiffness
  • Dynamic modulus of elasticity
  • Electromagnetic devices
• Publication/ Report Number:
  IHRB Project TR-653 ; InTrans Project 13-446
• Resource Type:
  Tech Report
• Geographical Coverage:
  Iowa
• Corporate Publisher:
  Iowa State University. Institute for Transportation
• Abstract:
  Asphalt pavements suffer various failures due to insufficient quality within their design lives. The American Association of State ; Highway and Transportation Officials (AASHTO) Mechanistic-Empirical Pavement Design Guide (MEPDG) has been proposed ; to improve pavement quality through quantitative performance prediction. Evaluation of the actual performance (quality) of ; pavements requires in situ nondestructive testing (NDT) techniques that can accurately measure the most critical, objective, and ; sensitive properties of pavement systems. The purpose of this study is to assess existing as well as promising new NDT ; technologies for quality control/quality assurance (QC/QA) of asphalt mixtures. Specifically, this study examined field ; measurements of density via the PaveTracker electromagnetic gage, shear-wave velocity via surface-wave testing methods, and ; dynamic stiffness via the Humboldt GeoGauge for five representative paving projects covering a range of mixes and traffic loads. ; The in situ tests were compared against laboratory measurements of core density and dynamic modulus. The in situ PaveTracker ; density had a low correlation with laboratory density and was not sensitive to variations in temperature or asphalt mix type. The ; in situ shear-wave velocity measured by surface-wave methods was most sensitive to variations in temperature and asphalt mix ; type. The in situ density and in situ shear-wave velocity were combined to calculate an in situ dynamic modulus, which is a ; performance-based quality measurement. The in situ GeoGauge stiffness measured on hot asphalt mixtures several hours after ; paving had a high correlation with the in situ dynamic modulus and the laboratory density, whereas the stiffness measurement of ; asphalt mixtures cooled with dry ice or at ambient temperature one or more days after paving had a very low correlation with the ; other measurements. To transform the in situ moduli from surface-wave testing into quantitative quality measurements, a QC/QA ; procedure was developed to first correct the in situ moduli measured at different field temperatures to the moduli at a common ; reference temperature based on master curves from laboratory dynamic modulus tests. The corrected in situ moduli can then be ; compared against the design moduli for an assessment of the actual pavement performance. A preliminary study of micro-electromechanical systems- (MEMS)-based sensors for QC/QA and health monitoring of asphalt pavements was also performed.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28751/dot_28751_DS1.pdf
• File Type:
  [PDF - 20.39 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:fa953f0999ab5a62cfa8e7fddd6c363dcba565dbe90fc2408ed6911f79d1183a