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Cradle-to-Site Carbon Emissions Assessment of Prefabricated Rebar Cages for High-Rise Buildings in China

Author

Listed:
  • Boya Jiang

    (School of Architecture, Nanjing Tech University, Nanjing 211816, China)

  • Hongxian Li

    (School of Architecture and Built Environment, Deakin University, Locked Bag 20001, Geelong, Victoria 3220, Australia)

  • Ling Dong

    (School of Architecture, Nanjing Tech University, Nanjing 211816, China)

  • Yu Wang

    (School of Architecture Engineering, Nanjing Institute of Technology, Nanjing 211167, China)

  • Yiqi Tao

    (Department of Architecture, The University of Hong Kong, Hong Kong 999077, China)

Abstract

Construction industrialization is growing rapidly and has received significant attention worldwide in recent years. The industrialization of construction results in several benefits, including the promotion of sustainable construction and the development and application of prefabrication techniques. The Prefabricated Rebar Cage (PRC) is an emerging solution applied to high-rise buildings as a replacement of the In-situ Reinforcing Bar (ISRB) construction method. This paper investigates the cradle-to-site carbon emissions of PRC, and compares the results with those of conventional in-situ rebar construction methods for high-rise buildings. The cradle-to-site cycle is divided into three stages, namely, material preparation, transportation, and on-site construction. For the material preparation stage, it is found that CO 2 emissions are increased by 3% when using PRC due to the operation of machinery during the prefabrication process. In the transportation stage, CO 2 emissions are found to increase by 3.3 times for PRC, as there is more transportation required for PRCs than for conventional construction methods. During the on-site construction stage, the PRC method demonstrates its advantages by reducing CO 2 emissions by 44.7%, which is attributed to decreased hoisting frequency and lower mechanical utilization for fewer joining activities. Overall, CO 2 emissions can be reduced by 1.24% by adopting the PRC method for high-rise buildings, and it is therefore recommended to adopt PRCs for this purpose. This research studies carbon emissions of PRC and contributes to promoting the sustainable development of prefabricated building techniques.

Suggested Citation

  • Boya Jiang & Hongxian Li & Ling Dong & Yu Wang & Yiqi Tao, 2018. "Cradle-to-Site Carbon Emissions Assessment of Prefabricated Rebar Cages for High-Rise Buildings in China," Sustainability, MDPI, vol. 11(1), pages 1-29, December.
    • Handle: RePEc:gam:jsusta:v:11:y:2018:i:1:p:42-:d:192307
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    Cited by:

    1. López-Guerrero, Rafael E. & Vera, Sergio & Carpio, Manuel, 2022. "A quantitative and qualitative evaluation of the sustainability of industrialised building systems: A bibliographic review and analysis of case studies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 157(C).
    2. Sehee Han & Seunguk Na & Nam-Gi Lim, 2020. "Evaluation of Road Transport Pollutant Emissions from Transporting Building Materials to the Construction Site by Replacing Old Vehicles," IJERPH, MDPI, vol. 17(24), pages 1-15, December.

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