01659634

Component

https://doi.org/10.1177/0361198118777090

The overall objective of this study was to assess the use of Level 1 analysis for mechanistic-empirical (ME) rehabilitation designs of deteriorated polymer-modified asphalt concrete (AC) pavements in Nevada using the AASHTOWare® Pavement ME software. This research also explored the possible implementation of a hybrid approach for AC damage characterization to overcome the challenges associated with the use of the Witczak model for estimating the undamaged dynamic modulus master curve of the existing AC layer. Two rehabilitation field projects were used as part of this study. The experimental plan involved falling weight deflectometer (FWD) testing in the right wheelpath before rehabilitation, analysis of core samples, estimation of an equivalent undamaged dynamic modulus, and estimation of equivalent damaged dynamic modulus from FWD backcalculation. The proposed hybrid approach consisted of conducting laboratory dynamic modulus testing on the collected core samples and estimating an equivalent undamaged dynamic modulus at the same FWD testing temperature and loading frequency. The pre-overlay damage, characterized based on the approach in Pavement ME Design software (i.e., using a Witczak prediction model and backcalculated modulus), showed overly high values that did not match with the collected pre-overlay distress data on either of the rehabilitation projects. Based on the findings from this study, the hybrid approach was recommended for implementation by Nevada Department of Transportation (NDOT) when designing AC overlay over polymer-modified asphalt pavements in Nevada. Recommendations for user inputs were also provided for future consideration in Pavement ME Design software.

18-03000

English

pp 228-241

2018-12

Transportation Research Record: Journal of the Transportation Research Board

Print

Figures (5) ; Photos; References (16) ; Tables (3)

Asphalt concrete pavements; Backcalculation; Dynamic modulus of elasticity; Falling weight deflectometers; Mechanistic-empirical pavement design; Overlays (Pavements); Polymer asphalt; Rehabilitation

AASHTOWare (Software)

Damage assessment; Master curves; Witczak model

Nevada

Design; Highways; Maintenance and Preservation; Pavements

TRIS, TRB, ATRI

Jan 8 2018 10:43AM

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• Determining the Age and Smoothness of Asphalt and Concrete Pavements at the Time of First Rehabilitation using Long-Term Pavement Performance Program Data
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• Development of Domain Analysis to Predict Multi-Axial Flexible Airfield Pavement Responses Due to Gear and Environmental Loadings
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• Establishing the Interlayer Structural Response for Unbonded Concrete Overlays of Existing Concrete Pavements
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• International Roughness Index Prediction Model for Thin Hot Mix Asphalt Overlay Treatment of Flexible Pavements
• Issues in the Prediction of the Mechanical Properties of Open Graded Mixes
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• Mechanistic-Empirical Simulations and Life-Cycle Cost Analysis to Determine the Cost and Performance Effectiveness of Asphalt Mixtures Containing Recycled Materials
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