Life-Cycle Optimization of Pavement Overlay Systems
Publication: Journal of Infrastructure Systems
Volume 16, Issue 4
Abstract
Preservation (maintenance and rehabilitation) strategy is the critical factor controlling pavement performance. A life-cycle optimization (LCO) model was developed to determine an optimal preservation strategy for a pavement overlay system and to minimize the total life-cycle energy consumption, greenhouse gas (GHG) emissions, and costs within an analysis period. Using dynamic programming optimization techniques, the LCO model integrates dynamic life-cycle assessment and life-cycle cost analysis models with an autoregressive pavement overlay deterioration model. To improve sustainability in pavement design, a promising alternative material for pavement overlays, engineered cementitious composites (ECCs), was studied. The LCO model was applied to an ECC overlay system, a concrete overlay system, and a hot mixed asphalt (HMA) overlay system. The LCO results show that the optimal preservation strategies will reduce the total life-cycle energy consumption by 5–30%, GHG emissions by 4–40%, and costs by 0.4–12% for the concrete, ECC, and HMA overlay systems compared to the current Michigan Department of Transportation preservation strategies, respectively. The impact of traffic growth on the optimal preservation strategies was also explored.
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Acknowledgments
This research was funded through an NSF Materials Use: Science, Engineering, and Society (MUSES) Biocomplexity Program Grant (Grant Nos. UNSPECIFIEDCMS-0223971 and UNSPECIFIEDCMS-0329416). MUSES supports projects that study the reduction of adverse human impact on the total interactive system of resource use, the design and synthesis of new materials with environmentally benign impacts on biocomplex systems, as well as the maximization of efficient use of materials throughout their life cycles.
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Published In
Journal of Infrastructure Systems
Volume 16 • Issue 4 • December 2010
Pages: 310 - 322
Copyright
© 2010 ASCE.
History
Received: Apr 15, 2009
Accepted: Jul 26, 2010
Published online: Aug 2, 2010
Published in print: Dec 2010
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