Propose of Mix Design Method for CO2 Reduction Concrete Using the Regression Analysis

As argued by ‘Declaration of Concrete Environment (2010)’ of Korea and ‘Declaration of Asian Concrete Environment (2011)’ of six Asian countries, concrete as a single material has lately shown extremely large impact on environmental issues such as climate change. Assessment of environmental impact from concrete material and production has considerable importance. Concrete is a major material used in the construction industry that emits a large amount of substances with environmental impacts during its life cycle. Accordingly, technologies for the reduction in and assessment of the environmental impact of concrete from the perspective of Life Cycle Assessment must be developed. At present, the studies in relation to greenhouse gas emission from concrete are being carried out globally as a countermeasure against climate change. In this study, CO2 reduction concrete mix design algorithm was designed using correlation analyses, and its carbon emission and cost reduction performances were assessed. Using correlation analyses, the concrete strength, water/cement (w/c) ratio and fine aggregate/total aggregate (s/a) ratio, and CO2 emissions were identified as major variables of concrete mix design that influenced other variables. Also, this study aims to evaluate the CO2 emission reduction performance of the algorithm-deduced CO2 reduction concrete mix design, and therefore, the CO2 emissions of the CO2 reduction concrete mix design are compared with those of the actual concrete mix design applied to the construction of the office building A in South Korea.