Material Design, Construction, Maintenance, and Testing of Pavements, 2009
Within the context of the long-term pavement performance (LTPP) program, the purpose of the speci... more Within the context of the long-term pavement performance (LTPP) program, the purpose of the specific pavement studies-5 (SPS-5) experiment is to analyze the rehabilitation of asphalt concrete (AC) pavements. Most of the existing literature related to SPS-5 experiments addresses the effects of overlay thickness, overlay mix type, and pre-overlay preparation on the performance of AC pavements. A complete evaluation of the eight test sections (i.e., eight rehabilitation strategies) at one SPS-5 site is lacking in existing reports. In this study, grey relational analysis (GRA) was employed successfully to conduct studies on four SPS-5 sites in California, Colorado, New Jersey, and Texas, which are located in four climate regions. The long-term data of International Roughness Index (IRI), rutting, and three distresses (including longitudinal cracks, alligator cracks, and transverse cracks) were used to determine the effectiveness of eight rehabilitation strategies. The resulting ranking in effectiveness of rehabilitation strategies used in this study aligns well with the existing literature. With GRA the effectiveness of rehabilitation strategies can be quantified while depending less on engineering judgment. Evaluations based on the GRA provide a viable alternative for engineers when determining the best rehabilitation strategies for comprehensive LTPP or other studies.
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Papers by Jia-Ruey Chang