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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.13 No.6
- 발행연도
- 2019.9
- 수록면
- 713 - 725 (13page)
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초록· 키워드
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High-volume slag (HVS) can reduce the CO₂ emissions of concrete, but increase the carbonation depth of concrete. In particular, because of the effects of climate change, carbonation will accelerate. However, the uptake of CO₂ as a result of carbonation can mitigate the harm of CO₂ emissions. This study proposes an optimal mixture design method of low-CO₂ HVS concrete considering climate change, carbonation, and CO₂ uptake. Firstly, net CO₂ emissions are calculated by subtracting the CO₂ emitted by the material from the uptake of CO₂ by carbonation. The strength and depth of carbonation are evaluated by a comprehensive model based on hydration. Secondly, a genetic algorithm (GA) is used to find the optimal mixture. The objective function of the GA is net CO₂ emissions. The constraints of the GA include the strength, carbonation, workability, and range of concrete components. Thirdly, the results show that carbonation durability is a control factor of the mixture design of low-strength HVS concrete, while strength is a control factor of the mixture design of high-strength HVS concrete. After considering climate change, the threshold of strength control increases. With the increase of strength, the net CO₂ emissions increase, while the CO₂ uptake ratio decreases.
목차
Abstract
1. Introduction
2. Formulation for the Optimization of Concrete Mixing Proportions
3. Illustrations of Design Examples
4. Conclusions
References
참고문헌 (30)
참고문헌 신청
Demis, S., Efstathiou, M. P., & Papadakis, V. G. (2014). Computer-aided modeling of concrete service life. Cement & Concrete Composites, 47, 9?18. https :// doi.org/10.1016/j.cemco ncomp .2013.11.004.
Fang, X. L., Xuan, D. X., & Poon, C. S. (2017). Empirical modelling of CO2 uptake by recycled concrete aggregates under accelerated carbonation conditions. Materials and Structures, 50, 200?213. https ://doi.org/10.1617/s1152 7-017-1066-y.
Jang, J. G., & Lee, H. K. (2016). Microstructural densification and CO2 uptake promoted by the carbonation curing of belite-rich Portland cement. Cement and Concrete Research, 82, 50?57. https ://doi.org/10.1016/j.cemco nres.2016.01.001.
Juenger, M. C., & Siddique, R. (2015). Recent advances in understanding the role of supplementary cementitious materials in concrete. Cement and Concrete Research, 78, 71?80. https ://doi.org/10.1016/j.cemco nres.2015.03.018.
Kim, T. H., & Chae, C. U. (2016). Evaluation analysis of the CO2 emission and uptake life cycle for precast concrete in Korea. Sustainability, 8, 663?676. https ://doi.org/10.3390/su807 0663.
Fang, X. L., Xuan, D. X., & Poon, C. S. (2017). Empirical modelling of CO2 uptake by recycled concrete aggregates under accelerated carbonation conditions. Materials and Structures, 50, 200?213. https ://doi.org/10.1617/s1152 7-017-1066-y.
Jang, J. G., & Lee, H. K. (2016). Microstructural densification and CO2 uptake promoted by the carbonation curing of belite-rich Portland cement. Cement and Concrete Research, 82, 50?57. https ://doi.org/10.1016/j.cemco nres.2016.01.001.
Juenger, M. C., & Siddique, R. (2015). Recent advances in understanding the role of supplementary cementitious materials in concrete. Cement and Concrete Research, 78, 71?80. https ://doi.org/10.1016/j.cemco nres.2015.03.018.
Kim, T. H., & Chae, C. U. (2016). Evaluation analysis of the CO2 emission and uptake life cycle for precast concrete in Korea. Sustainability, 8, 663?676. https ://doi.org/10.3390/su807 0663.
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