| Title |
Compressive Strength Development of Concrete using Electric Arc Furnace Oxidizing Slag Aggregates |
| Authors |
정기태(Jeong, Ki-Tae) ; 양근혁(Yang, Keun-Hyeok) ; 김도범(Kim, Do-Bum) ; 이동섭(Lee, Dong-Seop) |
| DOI |
https://doi.org/10.5659/JAIK.2023.39.10.281 |
| Keywords |
Electric Arc Furnace Oxidizing Slag Aggregate; Compressive Strength Development; Curing Temperature |
| Abstract |
This study examined the compressive strength development of concrete using electric arc furnace oxidizing (EAFO) slag particles as a coarse
aggregate. The main parameters considered were water-to-binder (W/B) ratio, maximum size of aggregates, and curing temperature (T). The
test results showed that the 28-day compressive strength [fc(28)] of EAFO slag aggregate concrete was commonly lower than the conventional
concrete using natural aggregates with the same W/B ratio, indicating greater differences under T of 5 °C and 35 °C than under T of 20 °C.
Additionally, a lower decreasing rate of fc(28) with respect to the increase in W/B ratio was observed for EAFO slag aggregate concrete than
for the conventional concrete using natural aggregates. No crossover effect was observed for EAFO slag aggregate concrete cured under the
different temperatures. The previous models formulated from equivalent age method were not reasonable in assessing the compressive strength
development of EAFO slag aggregate concrete. Therefore, this study modified the parameter explaining the compressive strength gain rate
specified in KDS 14 20 to assess the effect of curing temperature on the strength gain rate of EAFO slag aggregate concrete. |