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Mixture Optimization of Sustainable Concrete with Silica Fume Considering CO2 Emissions and Cost

Author(s):

ORCID
Medium: journal article
Language(s): English
Published in: Buildings, , n. 10, v. 12
Page(s): 1580
DOI: 10.3390/buildings12101580
Abstract:

This research presents a framework for the mixture design of sustainable SF-modified concrete. The design strength at 28 days was scaled to different values (e.g., 30, 40, 50, and 60 MPa). CO2 emissions and cost were chosen as the design variables to optimize. Strength, slump, and carbonation durability with global warming were applied as constraints of optimal design. The analysis revealed that, for low-CO2 concrete, when the design strength was 30 or 40 MPa, to fulfill the requirement of carbonation, the actual concrete strength ought to be 45.39 MPa, which was much greater than the design strength. Carbonation did not affect the mixtures scaled to a high design strength (50 and 60 MPa). The SF/binder ratio was maximum for low-CO2 concrete. Furthermore, for low-total_cost concrete, when the design strength was 30 MPa, the actual strength was 31.28 MPa after considering carbonation. Moreover, when considering global warming, the actual strength should be 33.44 MPa. The SF/binder ratio was minimum for low-cost concrete. Lastly, for low-material-cost concrete, the design was equivalent to the low-total_cost concrete, along with much lower CO2 emissions. In summary, the suggested technique is valuable for the design of sustainable SF-modified concrete with low CO2 and low cost.

Copyright: © 2022 by the authors; licensee MDPI, Basel, Switzerland.
License:

This creative work has been published under the Creative Commons Attribution 4.0 International (CC-BY 4.0) license which allows copying, and redistribution as well as adaptation of the original work provided appropriate credit is given to the original author and the conditions of the license are met.

  • About this
    data sheet
  • Reference-ID
    10699888
  • Published on:
    11/12/2022
  • Last updated on:
    10/05/2023
 
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