Validation of carbon emission intensity in precast concrete structure using hybrid life cycle assessment
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There has been a growing interest in quantifying the direct and indirect energy and carbon emission embodied in construction materials and building component production. By understanding how energy is consumed, designers can significantly reduce environmental impact by selecting materials with low embodied energy and carbon emission intensity. Previous research showed that indirect emission could be higher than direct emission for energy-intensive materials such as cement and reinforcement steel. It is argued that quantifying direct emission alone could underestimate the total amount of energy and carbon emission and subsequently its impact to the environment. However, indirect energy and emission assessment is a challenging task involving upstream process of construction materials production. To address this issue, this paper demonstrates the application of hybrid life cycle assessment to assess indirect carbon emission variation embodied in precast concrete structures. Results showed that the indirect emission embodied in the materials and components production of precast concrete structure accounts for as much as 40%.
Advances in Structural Engineering and Mechanics (ASEM13)