Mixture proportioning approach for low-CO2 concrete using supplementary cementitious materials
- Authors
- Yang, Keun-Hyeok; Tae, Sung-Ho; Choi, Dong-Uk
- Issue Date
- Jul-2016
- Publisher
- American Concrete Institute
- Keywords
- life-cycle assessment; Low-CO2 concrete; Mixture proportions; Supplementary cementitious materials
- Citation
- ACI Materials Journal, v.113, no.4, pp.533 - 542
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACI Materials Journal
- Volume
- 113
- Number
- 4
- Start Page
- 533
- End Page
- 542
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/13172
- DOI
- 10.14359/51688992
- ISSN
- 0889-325X
- Abstract
- This study developed a simple and rational mixture proportioning procedure for low-CO2 concrete using supplementary cementitious materials (SCMs) such as fly ash (FA), ground-granulated blast-furnace slag (GGBS), and condensed silica fumes (SF). Life-cycle CO2 reduction ratio was critically considered as one of the targeted requirements. The effect of SCMs on CO2 reduction and the compressive strength of concrete was examined by a nonlinear multiple regression analysis using a total of 12,537 datasets, which produced schematized data allowing for the straightforward design of SCMs for satisfying the targeted requirements. Considering the determined substitution level of SCMs for a targeted CO2 reduction ratio, unit binder content and water-binder ratio (W/B) were formulated for the designed compressive strength and entrained air content of concrete. The fine aggregate-to-total aggregate ratio (S/a) was determined from the quadratic formula of a parametrized value for a targeted initial slump of concrete. Overall, the developed procedure is expected to encourage the practical production and application of low-CO2 concrete in the ready mixed concrete field.
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