Experimental Evaluation of Asphalt Mixtures Containing Basic Oxygen Furnace (BOF) and Electric Arc Furnace (EAF) Slags

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Abstract

In previous studies on the use of steel slag in asphalt mixtures, no comparison has been made between different types of slags produced in steel factories in Iran. In this research, in order to evaluate the mechanical properties of asphalt mixtures containing different amounts of steel slag and to compare their effects on mixture behaviors, two types of slags – BOF and EAF – were replaced with 25, 50, 75 and 100 percent of coarse part of aggregates. After characterization of limestone aggregates and steel slags using X-ray fluorescence equipment (XRF) and scanning electron microscope (SEM), Marshall mix design method was used to determine the optimum bitumen content. Moreover, the mechanical properties of mixtures using resilient modulus testing at different temperatures and indirect tensile strength testing in both dry and saturated conditions were evaluated. The results showed that the use of steel slag in asphalt mixtures could result in a significant improvement of asphalt mixture properties. Furthermore, moisture sensitivity of mixtures containing steel slags was less than the control mixture.

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References

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Journal of Transportation Infrastructure Engineering
Volume 1, Issue 3 - Serial Number 3
November 2015
Pages 15-31

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  • Receive Date: 17 November 2015
  • Accept Date: 17 November 2015

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