Nondestructive quality assessment of asphalt pavements based on dynamic modulus

Abstract Dynamic modulus has been recognized as an objective and sensitive material property for designing and evaluating pavement systems. To accurately measure the in situ elastic modulus ( E  = 2(1 + ν) ρV s 2 ) for nondestructive quality assessment of asphalt pavements, field measurements of density ( ρ ) via an electromagnetic gauge and shear-wave velocity ( V s ) via surface-wave testing were examined for four paving projects covering a range of mixes and traffic loads. A quality control/quality assurance (QC/QA) procedure was developed to correct the in situ moduli at different field temperatures to a common reference temperature using a fitting function from experimental data for QC and using master curves from laboratory dynamic modulus tests for QA. The corrected in situ moduli can then be compared against the maximum moduli for an assessment of the actual pavement performance.

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