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The construction of building elements produces a significant amount of greenhouse gas (GHG) emissions. Precast or industrial building system (IBS) construction is widely used alternative construction methods. This study evaluates the greenhouse gas (GHG) emissions associated with conventional and precast construction methods for high-rise residential buildings in Malaysia, using the IBS (Industrialized Building System) score as a benchmark. The research focuses on two case studies, analyzing emissions from embodied materials, transportation, and construction processes. Project 1, with an IBS score of 79.7%, emitted 11,989.09 tonnes CO₂-eq, while Project 2, with a score of 71.7%, produced 11,137.66 tonnes CO₂-eq. Results indicate that higher IBS scores, which involve greater use of precast elements, correlate with lower GHG emissions. Fully precast methods reduced emissions by up to 36.1% for Project 1 and 27.1% for Project 2 compared to fully conventional methods. The findings underscore the environmental benefits of adopting precast construction techniques to reduce carbon footprints and contribute to sustainable building practices in Malaysia.

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Comparing Carbon Emissions of Conventional and Precast Construction Methods Based on IBS-Score Values – A Case Study of High-Rise Residential Building Construction in Malaysia

  • 会议论文

  • 发表日期：

    2025年

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  • Norhayati Abd Manap,
  • Norelyza Hussein,
  • Norasikin Saman,
  • Shazwin Mat Taib,
  • Nor Hasanah Abdul Shukor Lim,
  • Mohd Khairolden Ghani,
  • Mhd. Jumain Mapplati,
  • Nurul Nazleatul Najiha Mohd Nazif,
  • Nurfarhain Mohamed Rosli,
  • Che Hafizan Che Hassan

摘要

The construction of building elements produces a significant amount of greenhouse gas (GHG) emissions. Precast or industrial building system (IBS) construction is widely used alternative construction methods. This study evaluates the greenhouse gas (GHG) emissions associated with conventional and precast construction methods for high-rise residential buildings in Malaysia, using the IBS (Industrialized Building System) score as a benchmark. The research focuses on two case studies, analyzing emissions from embodied materials, transportation, and construction processes. Project 1, with an IBS score of 79.7%, emitted 11,989.09 tonnes CO₂-eq, while Project 2, with a score of 71.7%, produced 11,137.66 tonnes CO₂-eq. Results indicate that higher IBS scores, which involve greater use of precast elements, correlate with lower GHG emissions. Fully precast methods reduced emissions by up to 36.1% for Project 1 and 27.1% for Project 2 compared to fully conventional methods. The findings underscore the environmental benefits of adopting precast construction techniques to reduce carbon footprints and contribute to sustainable building practices in Malaysia.