Abstract
Recent research in the construction industry has focused on the reduction of CO2 emission using quantitative assessment of building life. However, most of this research has focused on the operational stage of a building’s life cycle. Few comprehensive studies of CO2 emissions during building construction have been performed. The purpose of this study is to analyze the CO2 emissions of an apartment housing during the construction process. The quantity of CO2 emissions associated with the utilization of selected building materials and construction equipment were used to estimate the CO2 emissions related to the apartment housing life cycle. In order to set the system boundary for the construction materials, equipment, and transportation used, 13 types of construction work were identified; then the CO2 emissions produced by the identified materials were calculated for each type of construction work. The comprehensive results showed that construction work involving reinforced concrete accounted for more than 73% of the total CO2 emissions. The CO2 emissions related to reinforced concrete work was mainly due to transportation from the supplier to the construction site. Therefore, at the time that reinforced concrete is being supplied, shipping distance and fuel economy management of concrete transportation vehicles should be considered thoroughly for significant reduction of CO2 emissions.
Highlights
Much effort has been made to improve environmental regulations in order to properly respond to climate change associated with global warming, both overseas and domestically throughout all industries
The amount of CO2 emissions from reinforced concreted work accounted for 89% of all work types, which was analyzed to display most of the CO2 emission characteristics
It was found that the load distance between the construction site and the concrete manufacturer, and the fuel efficiency of concrete transportation vehicles must be managed in order to reduce the amount of CO2 emissions in the construction process
Summary
Much effort has been made to improve environmental regulations in order to properly respond to climate change associated with global warming, both overseas and domestically throughout all industries. Technology that could achieve the CO2 emissions reduction goal through a realistic CO2 emissions reduction plan, over the entire life cycle of buildings, is needed. In order to reduce the amount of CO2 emissions that are inevitable over the entire life cycle of buildings, the construction industry is evaluating this via quantitative investigation, and research on methods that could reduce or improve carbon emissions are actively underway [5]. In order to reduce the CO2 emissions that are released over the life cycle of a building, the CO2 emissions data must first be analyzed for each stage, and a building’s greenhouse gas evaluation must be performed considering its entire life cycle. There is very little research on CO2 emission assessment of construction processes because data analysis is difficult due to the short construction period, and because data is difficult to secure [6,7]
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