Life cycle assessment of pavement: Methodology and case study |
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| Authors: | Bin Yu Qing Lu |
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| Institution: | 1. Department of Civil & Environmental Engineering, Materials Research Laboratory, Massachusetts Institute of Technology, Building E19-695, Cambridge, MA, 02139, USA;2. Institute for Data, Systems and Society, Materials Research Laboratory, Massachusetts Institute of Technology, Building E19-695, Cambridge, MA, 02139, USA;1. Engineering Design Group, Universitat Jaume I, Av. Sos Baynat s/n, 12071 Castellón, Spain;2. Construction Engineering Laboratory, University of Granada, C/Severo Ochoa s/n, 18071 Granada, Spain |
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| Abstract: | A life cycle assessment model is built to estimate the environmental implications of pavements using material, distribution, construction, congestion, usage, and end of life modules. A case study of three overlay systems, Portland cement concrete overlay, hot mixture asphalt overlay, and crack, seat, and overlay, is presented. The case leads to the following conclusions. It is reasonable to expect less environmental burdens from the Portland cement concrete and crack, seat, and overlay options as opposed to hot mixture asphalt while although the results have a high degree uncertainties. The material, congestion, and particularly usage modules contribute most to energy consumption and air pollutant. Traffic related energy consumption and greenhouse gases are sensitive to traffic growth and fuel economy improvement. Uncertainties exist in the usage module, especially for the pavement structure effect. |
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