01124416

Component

https://doi.org/10.3141/2094-01

http://scholar.google.com...Timm&publication_year=2009

Embedded instrumentation has become an important tool at accelerated load facilities as states begin implementing mechanistic–empirical pavement design and analysis methodologies. Instrumentation can provide valuable information to help validate mechanistic models and develop a deeper understanding of pavement response under a wide range of conditions. Before these types of investigations are conducted, however, it is critical to determine if the response measurements are accurate and precise. Although both accuracy and precision are important, this investigation centers on establishing the practical level of within-gauge precision for asphalt strain measurements made at the National Center for Asphalt Technology pavement test track. Ten test sections, each containing 12 strain gauges, were included in this study. Falling weight deflectometer testing was conducted on strain gauges, and the absolute differences were calculated to determine individual gauge variability. It was found that within-gauge variability was not significantly affected by gauge orientation, load level, or pavement condition. Overall, strain readings with differences less than 12 µϵ were set as a practical benchmark for the test track for within-gauge variability. It is recommended that, as the sections continue to deteriorate, further testing be conducted to better quantify the relationship between variability and pavement distress.

01138534

09-0667

English

pp 3-11

2009

Transportation Research Record: Journal of the Transportation Research Board

9780309126113

Print

Figures (10) ; References (16)

Asphalt pavements; Falling weight deflectometers; Pavement design; Pavement distress; Precision; Strain gages; Strain measurement; Test tracks

Mechanistic-Empirical Pavement Design Guide

Repeatability

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways

TRIS, TRB, ATRI

Jan 30 2009 4:54PM

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• Bottom–Up Fatigue Cracking of Low-Volume Flexible Pavement Analysis from Instrumented Testing
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• Predicting Remaining Strength of Flexible Pavement and Overlay Design Thickness with Stochastic Modeling
• Semi-Automated Faulting Measurement for Rigid Pavements: Approach with High-Speed Inertial Profiler Data