Browsing by Author "Li CZ"

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Carbon footprint accounting of prefabricated buildings: A circular economy perspective
    (Elsevier Ltd, 2024-06-15) Li CZ; Tam VWY; Lai X; Zhou Y; Guo S
    Prefabricated buildings have gained significant attention as a solution for reducing carbon footprint in the construction industry. However, there is a lack of a comprehensive accounting approach tailored to the construction features of prefabricated buildings. To address this issue, this study develops a framework to account the life-cycle carbon footprint of prefabricated buildings within the circular economy principles. The developed framework is applied to a prefabricated building in Chengdu, China, revealing that a significant carbon footprint is attributed to the material production and transportation stages. Moreover, an uncertainty analysis is conducted based on Data Quality Indicator evaluation method and Monte Carlo Simulation to validate the accounting framework, and a minor deviation of 0.085 % between the uncertain and calculated values validates the proposed accounting framework. Furthermore, key processes to mitigate the carbon footprint are identified. The results show that cast-in-place concrete is a key process at the construction materials level. Building upon these findings, this study offers recommendations on accurately and efficiently accounting the carbon footprint of prefabricated buildings. The research findings contribute to fostering the accounting of the life-cycle carbon footprint for prefabricated buildings, establishing a theoretical and empirical basis for circular economy implementation in prefabricated buildings, and offering insights for making informed carbon emission reduction decisions in prefabricated buildings.
  • Thumbnail Image
    Item
    Lean construction management: A catalyst for evaluating and enhancing prefabricated building project performance in China
    (Elsevier Ltd, 2024-10-01) Li CZ; Tam VWY; Hu M; Zhou Y
    The development of prefabricated construction in China has encountered challenges that prevent it from fully realizing its potential advantages. To overcome the challenges, this research examines the implementation of lean construction management in prefabricated building projects as a strategic approach to enhance their performance. Initially, this study examines the casual links between the driving factors of lean construction management and the performance indicators in prefabricated buildings by employing a structural equation model. Moreover, a fuzzy comprehensive evaluation method is used to assess the performance of a selected prefabricated building across the four dimensions: project schedule, quality, cost and safety. Furthermore, through the analysis and research above, this paper proposes a performance enhancement path for prefabricated building projects based on the key driving factors of lean construction management. The research identifies 23 driving factors and 16 performance indicators. 13 key driving factors are identified, including (1) accurate positioning and lean evaluation of the project, (2) identification of project product market demand, (3) modular collaborative design of the project implementation plan, (4) component production plant standardization, (5) production procurement costs reduction, (6) distance and cost of component transportation reduction, (7) lean transportation program plan, (8) construction and assembly costs reduction and waste elimination, (9) modular parallel construction, (10) lean construction assembly technology and management technology, (11) internal performance incentive mechanism of the project organization, (12) lean culture cultivation and lean management training, and (13) support from senior management. In addition, this research proposes a performance enhancement path for prefabricated buildings. The findings contribute to the theoretical knowledge of lean construction management in prefabricated building projects and offer valuable guidance for its practical implementation.