|
Title |
Environmental Impact Assessment of Different Concrete Mixture Proportions according to Domestic Region and Season
|
|
DOI |
https://doi.org/10.4334/JKCI.2014.26.3.239 |
|
Keywords |
환경영향 ; CO2 ; 지역 ; 계절 ; 콘크리트 배합비율 environmental impact ; CO2 ; region ; season ; concrete mixture proportions |
|
Abstract |
This study analyzed a comprehensive database including 6331 ready-mixed concrete plant mixtures to quantitatively assess the environmental impact of concrete under mixture proportions variable according to the domestic region and season. The environmental impact indicator includes global warming, photochemical oxidant creation, abiotic resource depletion, acidification, eutrophication and human toxicity, which are determined from categorization, characterization, normalization and weighting process based on Korea lifecycle inventories. The determined environmental impact indicator was also normalized by concrete compressive strength (fck), which is defined as impact index, to calculate the environmental impact per unit strength of 1 MPa. The most common compressive strength of concrete used in the country is estimated to be 24 MPa and 27 MPa. For fct of 24 MPa, the lowest environmental impact indicator is observed in Ulsan, whereas the highest region is Gwangju and Daegu. This difference according to domestic region is primarily resulted from by the replacement of different supplementary cementitious materials. Furthermore, the impact index of concrete with fck of 24 MPa is higher by approximately 5% at wintertime than at summertime and standard season. The impact index gradually decreases with the increase of fck up to 35 MPa, beyond which it remains constant.
|