United States Department of Transportation
i
Evaluation of non-destructive technologies for construction quality control of HMA and PCC pavements in Louisiana : [tech summary].
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2013-11-01
[PDF-157.94 KB]
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Abstract:Current roadway quality control and quality acceptance (QC/QA) procedures for the Louisiana Department of Transportation and Development
(LADOTD) include coring for thickness, density, and air voids in hot mix asphalt (HMA) pavements and thickness and compressive strength
for Portland cement concrete (PCC) pavements. Mechanistic design is based on the moduli of pavement layers. As LADOTD pushes toward
performance-based specifi cations, new parameters of the pavement must be considered for QC/QA. Non-destructive testing (NDT) devices,
such as the light weight defl ectometer (LWD) and the portable seismic pavement analyzer (PSPA), Figure 1, provide a non-destructive and
portable means of quick in-place determination of pavement properties, resulting in an increase in sampling frequency to supplement coring.
The LWD and PSPA are capable of measuring the in-situ modulus of a pavement layer. The measurements of these devices can either be used
as a standalone measure or, in most cases, be correlated to other pavement properties. Many researchers have shown good trends between
measurements of the NDTs and other pavement properties, though variability has shown to diff er from report to report.
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