Field Evaluation of a Non-Nuclear Density Pavement Quality Indicator

摘要

The field performance of a non-nuclear density gauge was evaluated for measuringhot mix asphalt (HMA) pavement density. The gauge used is called the Pavement Quality Indicator (PQI) Model 300, invented and manufactured by TransTech Systems, Incorporated. The PQI's operation is based upon the density of asphalt being directly proportional to the measured dielectric constant of the material, i.e. the material's ability to store electrostatic energy per unit volume. Ten (10) sites were selected from ongoing paving projects in Connecticut for use in the evaluation of the PQI Model 300 in the field. For comparison, nuclear density tests were performed at the same locations where PQI readings were taken. Finally, cores were drilled and tested according to AASHTO T 166.