Journal
JOURNAL OF CLEANER PRODUCTION
Volume 103, Issue -, Pages 249-259Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2014.11.023
Keywords
Greenhouse gas emission; Extended system boundary; Building construction; Case study
Categories
Funding
- Research Grants Council of Hong Kong
- Research Institute of Sustainable Urban Development of The Hong Kong Polytechnic University
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Many studies have been conducted on the contributions of the construction industry to greenhouse gas (GHG) emissions. However, these studies focused on the embodied GHG emissions of buildings and were restricted by limited system boundaries due to a lack of detailed on and off-site process data, especially data for assembly and miscellaneous works as well as construction related human activities. This study therefore analyzed GHG emissions during the construction phase of a case study building on the basis of an extended system boundary in the context of China by utilizing detailed onsite process data. The results show that indirect emissions accounted for 97% of all GHG emissions. On-site electricity use and building materials production were the two greatest contributors to direct and indirect emissions respectively. Recombining the construction activities revealed that construction related human activities generated significant GHG emissions (385 tCO(2)e), which have been ignored in previous research. The findings also reveal that although some materials used during the construction process are negligible in terms of weight, such as polyamide safety nets and aluminum (<0.1%), they have a considerable impact on GHG emissions (2-3%). (C) 2014 Elsevier Ltd. All rights reserved.
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