CO₂ emission reduction effects of an innovative composite precast concrete structure applied to heavy loaded and long span buildings

다국어 초록 (Multilingual Abstract)

<P><B>Abstract</B></P> <P>A structural frame built using innovative composite precast concrete (CPC) developed using a new concept called the SMART frame was demonstrated to require less steel materials, concrete, and forms than reinforced concrete (RC) due to its higher structural efficiency. This not only resulted in a reduction of costs, but also less CO<SUB>2</SUB> emissions. In this study, we analyzed the CO<SUB>2</SUB> emission reduction effect of an innovative composite precast concrete structure applied to heavy loaded buildings with more than a 10m long span. A case study was conducted with CPC and RC members designed under the same conditions. The carbon dioxide emissions of the RC-structured building and SMART frame building were 435.5kg-CO<SUB>2</SUB>/m<SUP>2</SUP> and 414.1kg-CO<SUB>2</SUB>/m<SUP>2</SUP>, respectively. Thus, a CO<SUB>2</SUB> emission reduction of 21.4kg-CO<SUB>2</SUB>/m<SUP>2</SUP> was achieved. This corresponds to a 5.5% CO<SUB>2</SUB> reduction effect when the SMART frame was applied instead of RC, as the CO<SUB>2</SUB> emissions based on the input of resources was analyzed, which is equivalent to around 3.7% of the total CO<SUB>2</SUB> emissions of the case building. In addition, the total CO<SUB>2</SUB> emissions were estimated by also considering the oil and electricity power use. A CO<SUB>2</SUB> reduction effect of around 4.9% was achieved.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The CO<SUB>2</SUB> emission reduction effect of an innovative composite precast concrete structure applied to heavy loaded buildings is verified. </LI> <LI> The CO<SUB>2</SUB> emission of the RC-structured building was 435.5kg-CO<SUB>2</SUB>/m<SUP>2</SUP>, and that of the SMART frame building was 414.1kg-CO<SUB>2</SUB>/m<SUP>2</SUP>. </LI> <LI> There was 5.5% CO<SUB>2</SUB> reduction effect when SMART Frame was applied instead of RC. </LI> </UL> </P>