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Life Cycle Assessment of Construction and Demolition Waste from Railway Engineering Projects

Railway engineering generates large amounts of construction and demolition waste (CDW). To quantify the amount of CDW generated from railway engineering projects throughout the whole life cycle, a process-based life cycle assessment model is proposed in this paper. The life-cycle CDW is divided into...

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Autores principales: Huang, Jianling, Yin, Yang, Zheng, Lei, Zhang, Sibo, Zhao, Qingyun, Chen, Huihua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9071954/
https://www.ncbi.nlm.nih.gov/pubmed/35528368
http://dx.doi.org/10.1155/2022/6145755
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author Huang, Jianling
Yin, Yang
Zheng, Lei
Zhang, Sibo
Zhao, Qingyun
Chen, Huihua
author_facet Huang, Jianling
Yin, Yang
Zheng, Lei
Zhang, Sibo
Zhao, Qingyun
Chen, Huihua
author_sort Huang, Jianling
collection PubMed
description Railway engineering generates large amounts of construction and demolition waste (CDW). To quantify the amount of CDW generated from railway engineering projects throughout the whole life cycle, a process-based life cycle assessment model is proposed in this paper. The life-cycle CDW is divided into four parts: CDW from off-site transportation of construction materials (OSTCM), CDW from site operation wastage of construction materials (SOWCM), discard ballast from roadbeds, stationyard, bridges and tunnels (DB), and CDW from reparation and renewal of aging components (RRAC). Yun-Gui Railway is selected as a case study to validate the developed model, and an uncertainty analysis is conducted with Oracle Crystal Ball software. The results show that between 175 and 311 million tons of CDW is generated throughout the whole life cycle of Yun-Gui Railway. DB is the largest component of the life-cycle CDW from railway engineering projects. This indicates the negative environmental impacts of railway construction can be significantly mitigated by optimizing the location of ballast disposal sites and developing suitable landfill proposals. Also, the CDW generated by wastage of construction materials during off-site construction and site operation is important in waste management in railway engineering projects, in which rubble, sand, and cement have the high potential for waste reduction. Findings from this study can contribute to the knowledge body as well as the engineering practice in green railways.
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spelling pubmed-90719542022-05-06 Life Cycle Assessment of Construction and Demolition Waste from Railway Engineering Projects Huang, Jianling Yin, Yang Zheng, Lei Zhang, Sibo Zhao, Qingyun Chen, Huihua Comput Intell Neurosci Research Article Railway engineering generates large amounts of construction and demolition waste (CDW). To quantify the amount of CDW generated from railway engineering projects throughout the whole life cycle, a process-based life cycle assessment model is proposed in this paper. The life-cycle CDW is divided into four parts: CDW from off-site transportation of construction materials (OSTCM), CDW from site operation wastage of construction materials (SOWCM), discard ballast from roadbeds, stationyard, bridges and tunnels (DB), and CDW from reparation and renewal of aging components (RRAC). Yun-Gui Railway is selected as a case study to validate the developed model, and an uncertainty analysis is conducted with Oracle Crystal Ball software. The results show that between 175 and 311 million tons of CDW is generated throughout the whole life cycle of Yun-Gui Railway. DB is the largest component of the life-cycle CDW from railway engineering projects. This indicates the negative environmental impacts of railway construction can be significantly mitigated by optimizing the location of ballast disposal sites and developing suitable landfill proposals. Also, the CDW generated by wastage of construction materials during off-site construction and site operation is important in waste management in railway engineering projects, in which rubble, sand, and cement have the high potential for waste reduction. Findings from this study can contribute to the knowledge body as well as the engineering practice in green railways. Hindawi 2022-04-28 /pmc/articles/PMC9071954/ /pubmed/35528368 http://dx.doi.org/10.1155/2022/6145755 Text en Copyright © 2022 Jianling Huang et al. https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Huang, Jianling
Yin, Yang
Zheng, Lei
Zhang, Sibo
Zhao, Qingyun
Chen, Huihua
Life Cycle Assessment of Construction and Demolition Waste from Railway Engineering Projects
title Life Cycle Assessment of Construction and Demolition Waste from Railway Engineering Projects
title_full Life Cycle Assessment of Construction and Demolition Waste from Railway Engineering Projects
title_fullStr Life Cycle Assessment of Construction and Demolition Waste from Railway Engineering Projects
title_full_unstemmed Life Cycle Assessment of Construction and Demolition Waste from Railway Engineering Projects
title_short Life Cycle Assessment of Construction and Demolition Waste from Railway Engineering Projects
title_sort life cycle assessment of construction and demolition waste from railway engineering projects
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9071954/
https://www.ncbi.nlm.nih.gov/pubmed/35528368
http://dx.doi.org/10.1155/2022/6145755
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