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 Density Dynamic Modulus Of Elasticity Electromagnetic Devices Field Tests Laboratory Tests Nondestructive Tests Quality Assurance Quality Control Stiffness
• 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.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:fa953f0999ab5a62cfa8e7fddd6c363dcba565dbe90fc2408ed6911f79d1183a
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28751/dot_28751_DS1.pdf
• File Type:
  [PDF - 20.39 MB ]