Computers and Concrete

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Analytical model of expansion for electric arc furnace oxidizing slag-containing concrete

  • Shu, Chun-Ya (Department of Civil Engineering, National Kaohsiung University of Applied Sciences) ;
  • Kuo, Wen-Ten (Department of Civil Engineering, National Kaohsiung University of Applied Sciences) ;
  • Juang, Chuen-Ul (Department of Civil Engineering, National Kaohsiung University of Applied Sciences)
  • Received : 2016.03.31
  • Accepted : 2016.06.18
  • Published : 2016.11.25
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Abstract

This study applied autoclave expansion and heat curing to accelerate the hydration of concrete and investigated how these methods affect the expansion rate, crack pattern, aggregate size effect, and expansion of electric arc furnace oxidizing slag (EOS)-containing concrete. An expansion prediction model was simulated to estimate the expansion behavior over a long period and to establish usage guidelines for EOS aggregates. The results showed that the EOS content in concrete should range between 20% and 30% depending on the construction conditions, and that coarse aggregates with a diameter of ${\geq}4.75-mm$ are not applicable to construction engineering. By comparison, aggregates with a size of 1.18-0.03 mm resulted in higher expansion rates; these aggregates can be used depending on the construction conditions. On Day 21, the prediction model attained a coefficient of determination ($R^2$) of at least 0.9.

Keywords

Acknowledgement

Supported by : Ministry of Science and Technology of Taiwan

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