1. Life cycle assessment of asphalt pavement maintenance and rehabilitation techniques: a study for the City of St. John’s
- Author
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Rakibul Alam, Ali Azhar Butt, Carlos Bazan, Tim Caudle, and Kamal Hossain
- Subjects
Engineering ,Rehabilitation ,business.industry ,medicine.medical_treatment ,0211 other engineering and technologies ,Pavement maintenance ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,Asphalt pavement ,021105 building & construction ,Forensic engineering ,medicine ,business ,Life-cycle assessment ,0105 earth and related environmental sciences ,General Environmental Science ,Civil and Structural Engineering - Abstract
Although pavement maintenance and rehabilitation (M&R) techniques are usually examined in economic terms, there is a growing need to address their environmental footprints. The objective of this study is to assess the environmental impacts of M&R techniques. Life cycle assessment (LCA) can help in the decision-making process of selecting suitable maintenance techniques based on their environmental impacts. This study investigates: patching, rout & sealing, hot in-place recycling, and cold in-place recycling. Global warming potential (GWP), acidification potential, human health particulate, eutrophication potential, ozone depletion potential, and smog potential are estimated as environmental impacts for each maintenance activity. Materials, equipment use (for construction and M&R), and transportation were the main elements considered. A sensitivity test is performed to identify the significant factors for the LCA. The study concluded that GWP was the most important impact category. Rout & sealing and cold in-place recycling produced the lowest GWP emissions. Notably, pavement patching and hot in-place recycling showed significant detrimental environmental impacts.
- Published
- 2020