Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/75594
Title: Life cycle assessment of precast and cast-in-situ construction
Authors: Dong, YH
Jaillon, L
Poon, CS 
Keywords: Carbon emissions
Hong Kong
Life cycle assessment
Precast concrete
Prefabrication
Issue Date: 2016
Publisher: Vdf Hochschulverlag Ag An Der Eth Zurich
Source: Sustainable Built Environment (SBE) Regional Conference, Zurich, Switzerland, 2016, p. 426-429 How to cite?
Abstract: Prefabrication is a sustainable construction method to provide better quality control, improved site safety and a reduction of the construction time and labour demand as compared with the traditional cast-in-situ construction. Hong Kong is a mega city with over 40,000 buildings and limited land area. The adoption of precast concrete in building constructions has become more and more frequent in both public and private sectors. This study aims to compare the environmental impacts of precast and cast-in-situ construction methods through life cycle assessment. A typical private residential building project in Hong Kong is selected as both precast and cast-in-situ methods are used to construct the residential buildings. The comparison is carried out for the functional unit of a concrete fa double dagger ade element of the studied project. The scope of the study is to cover the processes from 'cradle to end of construction', including material extraction, manufacturing, transportation, and on-site construction. It is found that the precast facade performs 6.3% better than the cast-in-situ facade in terms of the carbon emissions. The carbon emission for the precast facade is 647 kg CO2 eq, while the figure is 708 kg CO2 eq for the cast-in-situ facade. Based on the research findings, it is recommended to adopt precast concrete in building constructions. The industry should consider the carbon reduction as a benefit to implement precast concrete.
URI: http://hdl.handle.net/10397/75594
ISBN: 978-3-7281-3774-6
Appears in Collections:Conference Paper

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