Maintenance Preservation Solution Matrix (MPSM)
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2025-02-21
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Edition:Final Report: 11/22/23 - 2/21/25
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Abstract:The goal of this study was to identify optimal preventative treatment types and timing of treatments throughout the service life cycles of pavements. The research was carried out in two phases. Phase 1 involved a comprehensive literature review to examine factors that influence the service life of pavements, including treatment application timing, traffic volume, climatic conditions, material properties, and pre-treatment conditions. The review also documented both traditional and innovative maintenance practices adopted by peer Departments of Transportation (DOTs). Findings from the literature indicated that the service life of a treatment can vary significantly depending on factors such as traffic, climate, construction methods, and materials. The timing of treatment application was found to be a key factor affecting pavement performance. Additionally, a questionnaire was distributed to gather information on innovative treatments implemented by peer DOTs over the past decade. Responses revealed that techniques such as micropaving, microsurfacing, mastics for crack sealing, and sealcoats were among the most widely used preventative maintenance treatments. Phase 2 focused on studying the optimal types and timing of maintenance treatments commonly applied in Pennsylvania. Treatments considered in this phase included seal coats, crack seals, micro-surfacing, and Novachip. Ten years of performance and construction data were analyzed to develop pre- and post-treatment performance curves. These curves were used to assess service life extension for the treatments across different climatic zones and Business Plan Networks (BPNs). Results showed that the extension of service life due to preventative treatments varied based on climatic zone and BPN. Specifically, treatments applied in warmer climates and to pavement networks with higher maintenance priorities (M&R) resulted in greater service life extensions compared to those applied in colder regions with lower M&R priorities. Additionally, the pretreatment Overall Pavement Index (OPI) and pavement age were found to play a critical role in determining service life extension. When treatments were applied within an optimal range of OPI and age, 2-3-fold increase in service life extension was observed across different preventative treatments. Based on the findings, a preliminary Excel®-based tool was developed to assist in selecting the optimal maintenance treatment types and timings, considering factors such as climatic zones, BPNs, pre-treatment OPI, and pavement age. A one-page implementation guideline was created to help PennDOT make informed decisions about the optimal timing and types of preventative maintenance treatments.
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