Date Approved

2-1-2021

Embargo Period

2-2-2021

Document Type

Dissertation

Degree Name

PhD Doctor of Philosophy

Department

Civil and Environmental Engineering

College

Henry M. Rowan College of Engineering

Advisor

Mehta, Yusuf

Committee Member 1

Bendjilali, Nasrine

Committee Member 2

Cleary, Douglas

Keywords

accelerated pavement testing, fatigue cracking, HMA overlays, reflection cracking, S-VECD, strain data analysis

Subject(s)

Pavements--Performance; Pavements--Maintenance and repair

Disciplines

Civil and Environmental Engineering

Abstract

This study was initiated with the aim of investigating the cracking performance, rutting performance, and cost effectiveness of specialty and composite HMA mixtures utilized in New Jersey to rehabilitate deteriorated rigid pavements. As such, four, plant-produced, specialty HMA overlay mixtures currently used in New Jersey were evaluated in this study. These overlay mixtures included: a dense-graded, 9.5-SP mixture, a gap-graded, 12.5-SMA mixture, a dense graded, 4.75-HPTO mixture, and a uniformly graded, 4.75-BRIC mixture. The 9.5-SP, 12.5-SMA, and 4.75-HPTO mixtures were produced using PG 76-22 binder while the 4.75-BRIC was contained a PG 70-28 binder. The laboratory cracking and rutting performance of the mixtures were assessed using the overlay test, the dynamic modulus test, uniaxial cyclic fatigue test, bending beam fatigue test, and asphalt pavement analyzer test. The field reflection cracking performance of the HMA overlay mixtures were assessed by performing accelerated pavement testing on six full-scale, field sections. The field sections contained a similar substructure. However, the overlays utilized on the field sections consisted of a 9.5-SP, 12.5-SMA, 4.75-HPTO, 9.5-SP & 4.75-BRIC, 12.5-SMA & 4.75-BRIC overlay, and 4.75-HPTO & 4.75BRIC. Based on the results of the study it was determined that the use of a 4.75-BRIC interlayer generally improved the reflection cracking performance and overall cost effectiveness of the conventional and specialty overlay mixtures.

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