Quantifying the Carbon Reduction Potential of Recycling Construction Waste Based on Life Cycle Assessment: A Case of Jiangsu Province

Liu, Hongmei; Guo, Rong; Tian, Junjie; Sun, Honghao; Wang, Yi; Li, Haiyan; Yao, Lu

doi:10.3390/ijerph191912628

Cited by 9 publications

(3 citation statements)

References 55 publications

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“…In comparison with the previous study, Broadbent [43] examined the advantages of recycling steel using the LCA approach and discovered that for every kilogramme of steel scrap recycled at the EOL phases, 1.5 kg of carbon emissions, 13.4 MJ of primary energy, and 1.4 kg of iron ore are avoided. Liu et al [67] quantified the carbon reduction potential of recycling construction waste in Jiangsu Province, China. According to their findings, recycling steel in the given scenario greatly reduces CO2 emissions, accounting for 39.48% of the possible reduction in carbon emissions.…”

Section: Comparison Between Environmental Impacts Of Current Steel Re...mentioning

confidence: 99%

The Circular Economy of Steel Roofing and Cladding and Its Environmental Impacts—A Case Study for New Zealand

et al. 2022

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This paper investigates the environmental impacts of two commonly used steel roofing and wall-cladding products in New Zealand over their life cycle, taking into consideration the recycling process. The recycling process of steel is in line with the Circular Economy (CE) approach, where the goal is to prolong the material’s lifetime and possibly reduce its environmental impacts and material waste. Although the benefit of recycling steel is well recognised, the environmental impact values of different specific steel products cannot be generalised and need to be estimated. For this, life cycle assessment (LCA) methodology and Environmental Product Declaration (EPD) were implemented to quantify the environmental impacts of the investigated steel products and to analyse the significance of the recycling process in reducing the impacts on the environment. This study considered modules C1–C4 and D to estimate the impacts of steel products. It was found that the recycled steel materials have an effect on reducing the environmental impacts, particularly the global warming potential (GWP) and photochemical ozone creation potential (POCP), both of which were negative and of −2.36 × 106 kg CO2eq and −8.10 × 102 kg C2H4eq, respectively. However, it is important to note that not all impacts were reduced by recycling steel, which creates trade-offs within each impact indicator. In addition, when compared with locally sourced material cladding, the imported material cladding had a 6% higher negative impact value for both GWP and POCP.

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Section: Comparison Between Environmental Impacts Of Current Steel Re...mentioning

confidence: 99%

The Circular Economy of Steel Roofing and Cladding and Its Environmental Impacts—A Case Study for New Zealand

et al. 2022

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“…It divides the cycle into six stages: raw material acquisition, material processing, component production, construction, building operation and maintenance, and demolition. Especially for the bridge demolition stage, a decisive factor in the carbon emission quantity is the demolition method [5]. Recently, various demolition methods have been proposed and applied, from blasting to static cutting, gradually reducing the impact on the environment.…”

Section: Introductionmentioning

confidence: 99%

Low-Carbon Emission Demolition of an Existing Urban Bridge Based on SPMT Technology and Full Procedure Monitoring

et al. 2023

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Due to the need for comprehensive transportation hub construction, an existing bridge in a bustling urban area with an operation duration of 25 years was required to be demolished. Based on Life Cycle Assessment (LCA), this paper proposes a scheme of "Self-propelled modular transporter (SPMT) technology + large segment cutting" to compare the carbon emissions of demolition schemes qualitatively and quantitatively. To ensure structural safety during demolition, the finite element analysis was used to simulate the entire demolishing process, and measuring points were set up to monitor the deformation of the main girder in real time under various demolition conditions. The results indicate that the scheme of SPMT has the lowest carbon emissions during the demolition stage. Additionally, the long-term prestress loss shall be considered when demolishing existing bridges; the suggested 25% proportional value for the long-term prestress loss of the Caitian Bridge is appropriate, which is determined by comparing the calculated results from various formulas. The values of the calculated and measured deformations of the main girder under different working conditions are in good agreement, with errors mostly within 10% and a maximum of no more than 14.7%. The demolition of the entire bridge was completed in a total of 28 h with little noise and pollution, and the impact on daily traffic was avoided, proving that the proposed “SPMT technology + large segment cutting” scheme is safe, efficient, and achieves the goal of green, environmentally friendly, and rapid demolition.

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“…Waste management is currently a highly analyzed and discussed topic [1][2][3][4][5]. This is because economic, civilizational and social development generates not only better living conditions, but also many adverse side effects.…”

Section: Introductionmentioning

confidence: 99%

Municipal Waste Management in Polish Cities—Is It Really Smart?

Jonek-Kowalska

2022

Smart Cities

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Efficient municipal waste management is one of the key aspects of smart cities. In the literature, modern technological solutions are mainly analyzed in this context on the example of specific case studies. However, the author of this article attempts a more fundamental, holistic and comparative assessment of waste management in cities, recognized as smart and aspiring to this title. The objective of this attempt is to answer the following question: What results do the designated cities achieve in terms of waste volume reduction, waste segregation and collection costs? The research was carried out on 16 Polish provincial cities used as examples, including two (Warsaw and Wrocław) classified as smart cities in ranking of the Cities in Motion Index 2020. The analysis period covers 2019–2021, and during the research, in addition to the parameters listed above, a multi-criteria analysis was used to allow a collective assessment of the effectiveness of municipal management in the surveyed cities. The results obtained allow the conclusion that the volume of waste per capita in most of the analyzed cities is steadily increasing. The cost of waste management is also growing significantly. These unfavorable phenomena are particularly acute for smart cities, which in the holistic assessment were ranked among the three least effective units in terms of waste management (Lublin, Warsaw, Wrocław).

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Quantifying the Carbon Reduction Potential of Recycling Construction Waste Based on Life Cycle Assessment: A Case of Jiangsu Province

Cited by 9 publications

References 55 publications

The Circular Economy of Steel Roofing and Cladding and Its Environmental Impacts—A Case Study for New Zealand

The Circular Economy of Steel Roofing and Cladding and Its Environmental Impacts—A Case Study for New Zealand

Low-Carbon Emission Demolition of an Existing Urban Bridge Based on SPMT Technology and Full Procedure Monitoring

Municipal Waste Management in Polish Cities—Is It Really Smart?

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