Life cycle assessment of a railway tracks substructures: Comparison of ballast and ballastless rail tracks

Pons, Joaquín J.; Sanchís, Ignacio Villalba; Franco, Ricardo Insa; Piqueras, Víctor Yepes

doi:10.1016/j.eiar.2020.106444

Cited by 52 publications

(21 citation statements)

References 28 publications

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“…As metodologias de análise em diferentes tipos de projetos têm adotado parâmetros técnicos (Pons et al, 2020), econômicos (Sasidharan et al, 2020) e ambientais (Shinde et al, 2018) para avaliação de cenários. Desta forma, os resultados permitiram suportar as decisões de modo a mensurar as relações de custo-benefício entre as diferentes perspectivas possíveis, como apresentado por Barrientos ( 2016) com a utilização de algoritmos de otimização inteligente para avaliação de projetos na construção de infraestrutura ferroviária.…”

Section: Revisão Bibliográficaunclassified

VARIABILIDADE GENÉTICA EM PROGÊNIES DE Parkia platycephala Benth

Silva¹,

Farias²,

Santos³

et al. 2021

Engenharias: Da Genialidade À Profissão E Seu Desenvolvimento

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Direitos para esta edição cedidos à Atena Editora pelos autores. Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição-Não-Comercial-NãoDerivativos 4.0 Internacional (CC BY-NC-ND 4.0).O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores, inclusive não representam necessariamente a posição oficial da Atena Editora. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais. Todos os manuscritos foram previamente submetidos à avaliação cega pelos pares, membros do Conselho Editorial desta Editora, tendo sido aprovados para a publicação com base em critérios de neutralidade e imparcialidade acadêmica.A Atena Editora é comprometida em garantir a integridade editorial em todas as etapas do processo de publicação, evitando plágio, dados ou resultados fraudulentos e impedindo que interesses financeiros comprometam os padrões éticos da publicação. Situações suspeitas de má conduta científica serão investigadas sob o mais alto padrão de rigor acadêmico e ético.

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Section: Revisão Bibliográficaunclassified

VARIABILIDADE GENÉTICA EM PROGÊNIES DE Parkia platycephala Benth

Silva¹,

Farias²,

Santos³

et al. 2021

Engenharias: Da Genialidade À Profissão E Seu Desenvolvimento

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“…In the context of sustainable design, the research team has also carried out other studies for the optimization of bridge design based on incorporated energy [12] or greenhouse gas emissions derived from construction [13]. Also, life cycle assessments have been applied to the sustainable design of concrete bridges [14,15] and in practical examples of retaining walls [16] or railroads [17]. All these studies are framed within the subjects "Prediction and optimization models of concrete structures" and "Concrete and sustainability" belonging to the Master of Concrete Engineering of the UPV, acquiring transversal competences of the combination between the different subjects.…”

Section: Postgraduate Civil Engineering Studiesmentioning

confidence: 99%

“…This method allows converting 18 mid-point indicators into 3 end-point indicators, namely, damage to human health, depletion of natural resources and damage to ecosystems. This method has been widely used in the existing literature [14][15][16][17]. With regard to economic impacts, there are no evaluation phases as such, since all impacts are expressed in the same unit of measurement and there is no standardization of the inventory data, defining the economic pillar as the sum of the cost of the different phases of the life cycle.…”

Section: Impact Assessmentmentioning

confidence: 99%

Multi-Criteria Decision Making Applied to Engineering Education. Economic-Environmental Sustainability in the Structure of Single-Family Homes

Sánchez-Garrido¹,

Navarro²,

Yepes³

2020

ICERI Proceedings

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This paper is based on the contents of the postgraduate course "Prediction and optimization models of concrete structures", taught in the Master of Concrete Engineering at the Polytechnic University of Valencia, in which civil engineering students are taught the various techniques of multi-criteria assessment, with a sustainable approach, applied to the optimal design of structures. This allows the student to compare complex aspects with generally contradictory objectives that characterize sustainability under criteria of economic, environmental and social efficiency, among others. Construction companies usually focus on cost optimization during the construction stage of structures that are currently not sufficient to meet the growing social demands of the 21st century world, needing to balance the criteria that support sustainability. The construction sector represents a relevant percentage of the total CO2 emissions, being responsible for a great part of the environmental impacts, which is enough reason for the European Union policies to be more and more oriented to the reduction of these emissions. This document presents a case study on a research being carried out by the faculty and students who are part of the research team, comparing two different construction alternatives, namely "traditional" in-situ concrete versus "prefabricated" with blocks and plates of Ytong. The aim is to find the structural optimum of an urban single-family house from the economic and environmental point of view throughout its life cycle. The objective is to find the structural optimum of an urban single-family house from the economic and environmental point of view throughout its life cycle. An analysis of indicators including the production phase, construction, the use and maintenance stage and the end of life has been carried out. The environmental impacts throughout the life cycle of the alternatives have been evaluated on the basis of the Ecoinvent 3.3 environmental database, using the ReCiPe impact assessment methodology. Finally, to evaluate the different alternatives, we have applied the multiple attribute method TOPSIS, based on distance to establish the order of preference by similarity with the ideal solution. Our findings show that the most economical solution in each phase is not the most environmentally efficient. For sustainability-based decision making that does not lead to erroneous results a balance must be sought between all dimensions, including not only monetary aspects in the structure design process.

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“…It is concluded that the majority of the carbon emissions and energy consumption of the entire rail system comes from the construction stage [ 30 ]. Pons et al evaluated the environmental impact of different railway track substructures including ballast, cast-in sleeper, and embedded track systems on the short-, medium-, and long-term by using the ReCiPe method to conduct a life cycle assessment of the railway infrastructure [ 31 ]. Akerman used a life cycle perspective to analyze the emission of the Europabanan, a high-speed rail track in Sweden, and found that the construction of new high-speed rail tracks will contribute to the reduction of carbon emissions [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

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

Huang

Yin

Zheng

et al. 2022

Computational Intelligence and Neuroscience

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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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Life cycle assessment of a railway tracks substructures: Comparison of ballast and ballastless rail tracks

Cited by 52 publications

References 28 publications

VARIABILIDADE GENÉTICA EM PROGÊNIES DE Parkia platycephala Benth

VARIABILIDADE GENÉTICA EM PROGÊNIES DE Parkia platycephala Benth

Multi-Criteria Decision Making Applied to Engineering Education. Economic-Environmental Sustainability in the Structure of Single-Family Homes

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

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