Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/19380
Title: Assessment of CO2 emissions reduction in high-rise concrete office buildings using different material use options
Authors: Chau, CK 
Hui, WK
Ng, WY
Powell, G 
Keywords: Material Use
Building elements
Carbon dioxide emissions
Issue Date: 2012
Publisher: Elsevier Science Bv
Source: Resources conservation and recycling, 2012, v. 61, p. 22-34 How to cite?
Journal: Resources Conservation and Recycling 
Abstract: This study applied the Monte Carlo method to generate probabilistic distributions for describing the CO2 footprint of the superstructure of a high-rise concrete office building. The distribution profile was constructed with the material use data collected from thirteen high-rise office concrete buildings in Hong Kong. Our results indicate that the superstructure of an office building (i.e. it does not embrace foundation or basement), on average, had a footprint of 215.1 kg CO2/m(2). External walls and upper floor construction had the highest CO2 footprint, followed by suspended ceilings and finishes. These three elements altogether accounted for an average of 84.2% of the CO2 footprint associated with the superstructure. Furthermore, this study also evaluated the emissions reduction impacts of five different material use options over a 60-year lifespan. Among all the studied options, the most effective option is to maintain 15-30% of the existing structural and non-structural building elements as it can reduce the CO2 footprint by 17.3%. Diverting construction wastes to recycling can reduce the CO2 footprint by 5.9%. Reusing resources and importing regional materials can each only reduce the CO2 footprint by 3.2% and 3.1% respectively. In contrast, the CO2 footprint will be increased by 5% if off-site fabricated materials are used in facades, slabs and partition walls.
URI: http://hdl.handle.net/10397/19380
ISSN: 0921-3449
DOI: 10.1016/j.resconrec.2012.01.001
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