Environmental life cycle analysis of pipe materials for sewer systems

Vahidi, Ehsan; Jin, Enze; Das, Maithilee; Singh, Mansukh; Zhao, Fu

doi:10.1016/j.scs.2016.06.028

Cited by 60 publications

(30 citation statements)

References 14 publications

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“…The construction phase of the sewers was the main contributor. To the best of the researcher's knowledge, few studies have investigated sustainability assessments for sewerage systems [10], [17], [37]- [46]. Indeed, none of these studies focused on assessing sewerage projects throughout their life cycles.…”

Section: Sustainability Assessment Of Sewerage Infrastructure Projectmentioning

confidence: 99%

“…Indeed, none of these studies focused on assessing sewerage projects throughout their life cycles. Notably, some studies focused on assessing the materials of the sewer system to find the most sustainable materials [10], [39], [46]. Two such studies [39], [46] found that the most sustainable material was concrete.…”

Section: Sustainability Assessment Of Sewerage Infrastructure Projectmentioning

confidence: 99%

“…Notably, some studies focused on assessing the materials of the sewer system to find the most sustainable materials [10], [39], [46]. Two such studies [39], [46] found that the most sustainable material was concrete. However, [10] found that polyvinyl chloride was the most sustainable material for sewer systems.…”

Section: Sustainability Assessment Of Sewerage Infrastructure Projectmentioning

confidence: 99%

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Sustainability Assessment of Sewerage Infrastructure Projects: A Conceptual Framework

Alnoaimi¹,

Rahman²

2019

IJESD

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Sustainable sewerage infrastructure projects are essential in achieving sustainable development, as infrastructure directly affects all measures of such development. However, sewerage infrastructures face a variety of challenges and threats to their sustained performance throughout their life cycle, including effects of aging, aggressive environmental factors, inadequate design, underfunding, improper operation, and maintenance activities. These challenges lead to the enhancement of the risks of failure, for example, sewer leakage, overflow, and odor. These issues can have serious impacts on the environment, public health and safety, the economy, and the service lives of assets. Only a few research has focused on assessing sustainability at the project level, and to the best of researchers' knowledge, no study has assessed sewerage throughout its project life cycle. In response to this issue, this study proposes a sustainability assessment framework that focuses on all aspects of sustainability throughout the project life cycle. Furthermore, this framework supports the decision-making process throughout the life cycle of assets, ensuring the long-term sustainability of the projects and providing greater transparency for the stakeholders.

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Section: Sustainability Assessment Of Sewerage Infrastructure Projectmentioning

confidence: 99%

Section: Sustainability Assessment Of Sewerage Infrastructure Projectmentioning

confidence: 99%

Section: Sustainability Assessment Of Sewerage Infrastructure Projectmentioning

confidence: 99%

See 1 more Smart Citation

Sustainability Assessment of Sewerage Infrastructure Projects: A Conceptual Framework

Alnoaimi¹,

Rahman²

2019

IJESD

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“…Recent literature show that sustainability research in the water sector focuses mostly on the topics of operation and maintenance of the urban water systems [16][17][18], or it focuses purely on environmental impacts (instead of overall sustainability) [18][19][20][21][22][23][24][25][26][27][28]. Some studies look specifically at the life cycle performance of different pipe materials [29,30] or renovation methods [31] where the goal is to quantify the environmental impact of the products. Vahidi et al [30] calculates unit values for sustainability impact of four different pipe materials across the phases of production, transportation, installation, and maintenance.…”

Section: Sustainability and The Life Cycle Approach In Urban Water Asmentioning

confidence: 99%

Reviewing the Long-Term Sustainability of Urban Water System Rehabilitation Strategies with an Alternative Approach

2018

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It is generally difficult to assess the performance of an infrastructure with a substantially longer life span than economic models can handle, and the life cycle concepts in urban water systems are normally limited to single-asset projects. In order to explore the long-term impact of urban water infrastructure rehabilitation strategies, a life cycle approach for survival functions is suggested. A life cycle factor based on survival functions is introduced, which is a measuring value of the total expected service life of all pipes within a group of pipes. Another factor, termed the sustainability factor, is based on the relationship between the life cycle factor and a rehabilitation reference method, which makes it possible to correct the long-term performance of rehabilitation methods based on their expected service life provision. A case study presents the implications for investments in infrastructure rehabilitation when applying the sustainability factor in long-term planning, and shows the importance of considering the service life of rehabilitation methods when planning renewal interventions that minimize costs over their life cycles.

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“…Usually, for pipes with diameters larger than 0.60 m, it is common to have a sufficient number of steel bars designed to withstand a combination of internal pressure and external loads (Nnadi and Lizarazo-Marriaga, 2012, Grengg et al, 2018, Joshi, 2015. A recent study commented that reinforced concrete pipes, with wider ranges of sizes (12-72 in) and relatively low corrosion rates compared to metallic pipes, are prevalent among ductile iron, vitrified clay, polyvinyl-chloride (PVC), composite fiber reinforced polymer (FRP) and high density polyethylene (HDPE) pipes (Vahidi et al, 2016). Corrosion of concrete sewers involves a range of abiotic and biotic processes.…”

Section: Introductionmentioning

confidence: 99%

Corrosion of reinforcing steel in concrete sewers

2018

Focus on Powder Coatings

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Hydrogen sulfide is a controlling factor for concrete corrosion in sewers, although its impact on sewer rebar corrosion has not been investigated to date. This study determined the corrosion mechanism of rebar in sewers by elucidating the roles of chloride ions, apart from the effects of hydrogen sulfide and biogenic sulfuric acid. The nature and distribution of rusts at the steel/concrete interface were delineated using the advanced mineral analytical techniques, including mineral liberation analysis and micro X-ray diffraction which is the first-ever use in such studies. The corrosion products were found to be mainly iron oxides or oxy-hydroxides. H 2 S and biogenic sulfuric acid did not directly participate in the product formation of steel partly covered by concrete or directly exposed to sewer atmosphere. Instead, chloride ions played an important role in initiating steel corrosion in sewers, supported by a thin chloride-enriched layer at the steel/rust interface. Away from the chloride-enriched layer, iron oxides accumulated on both sides of the mill-scale to form a corrosion layer and corrosion-filled paste respectively. The corrosion layer around rebar circumference was non-uniform and the rust thickness with respect to polar coordinates followed a Gaussian model. These findings support predictions of

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Environmental life cycle analysis of pipe materials for sewer systems

Cited by 60 publications

References 14 publications

Sustainability Assessment of Sewerage Infrastructure Projects: A Conceptual Framework

Sustainability Assessment of Sewerage Infrastructure Projects: A Conceptual Framework

Reviewing the Long-Term Sustainability of Urban Water System Rehabilitation Strategies with an Alternative Approach

Corrosion of reinforcing steel in concrete sewers

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