01656623

Component

This study evaluates three nondestructive testing (NDT) techniques for quality assessment of asphalt pavements. The three NDT techniques examined include an electromagnetic density gauge, a dynamic stiffness gauge, and geophysical surface wave tests for measuring modulus. In-situ NDT tests were carried out for four representative paving projects covering a range of asphalt mixes and traffic loads, and cores were extracted at the center of each NDT testing location for laboratory measurement of density and modulus. A comprehensive correlation analysis was carried out to examine the performance of each NDT method for quantifying the quality of the asphalt pavements. The in-situ density had a low correlation with the laboratory density and was not sensitive to variations in temperature and asphalt mix type. The in-situ stiffness measured on the asphalt mixtures several hours after paving had a high correlation with the in-situ dynamic modulus and laboratory density, and is therefore recommended as a quantitative property for quality control. Among the three NDT measurements, the in-situ modulus was most sensitive to variations in temperature and asphalt mix type. After correction for temperature effects, the corrected modulus is recommended as a quantitative property for quality assurance.

This paper was sponsored by TRB committee AFH20 Standing Committee on Quality Assurance Management. Alternate title: Assessment of Three Techniques for Nondestructive Testing of Asphalt Pavements.

18-00347

English

8p

2018

Transportation Research Board 97th Annual Meeting

Digital/other

Figures; References; Tables

Asphalt pavements; Core samples; Correlation analysis; Field tests; Laboratory tests; Nondestructive tests; Quality assurance; Quality control; Young's modulus

Dynamic stiffness gages; Electromagnetic density gages; Surface wave tests

Highways; Pavements

Transportation Research Board Annual Meeting 2018 Paper #18-00347

TRIS, TRB, ATRI

Jan 8 2018 10:06AM