Life Cycle Assessment of Precast Concrete Units

Precast concrete has been widely adopted in public housing construction of Hong Kong since the mid-1980s. While pre-casting is considered an environmental friendly solution, there is lack of study to investigate the life cycle performance of precast concrete units. This study aims to bridge the knowledge gap by providing a comprehensive life cycle assessment (LCA) study for two precast elements namely façade and bathroom. The results show that raw material is the most significant contributor of environmental impact accounting for about 90% to the total impact. Furthermore, human health is more affected by the production of precast concrete than the ecosystems.

Authors:

• Ya Hong Dong
• Conrad T.C. Wong
• S. Thomas Ng
• James M.W. Wong

Keywords:

• Environment
• green
• LCA
• LCIA
• precast.

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