Journal of Shandong University(Engineering Science) ›› 2025, Vol. 55 ›› Issue (4): 108-117.doi: 10.6040/j.issn.1672-3961.0.2024.025

• Civil Engineering • Previous Articles     Next Articles

Mechanical properties and constitutive relationship of steel slag fine aggregate concrete under impact load

XUE Gang, LIU Qiuyu*, DONG Wei, LI Jingjun   

  1. XUE Gang, LIU Qiuyu*, DONG Wei, LI Jingjun(College of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
  • Published:2025-08-31

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Abstract: In order to study the mechanical properties of steel slag fine aggregate concrete(SSC)under impact loading, axial impact compression tests of ordinary concrete and steel slag fine aggregate concrete with 10%, 20%, and 30% volume replacement ratios were carried out by using the 100 mm split Hopkinson pressure bar(SHPB). The effects of steel slag replacement ratio and strain rate on the dynamic compressive strength, impact toughness, dynamic increase factor(DIF)Fdi, and failure mode of SSC were investigated. Based on the Z-W-T equation, a modified dynamic damage constitutive equation suitable for steel slag concrete was obtained. The results showed that SSC had a significant strain rate effect, with the same amount of steel slag, the dynamic compressive strength, Fdi, impact toughness, and failure severity of SSC gradually increased with the growth of strain rate. The mechanical behavior under impact loading was changed by the addition of steel slag. When the strain rate was similar, the dynamic compressive strength and impact toughness of SSC showed an upward trend when the steel slag content increased from 0 to 30%, but the increase was relatively small, while the Fdi value significantly decreased after the addition of steel slag. By fitting the experimental stress-strain curve, it could be concluded that the Z-W-T equation considering damage evolution could effectively describe the dynamic stress-strain relationship of SSC.

Key words: concrete, steel slag concrete, split Hopkinson compression bar, dynamic mechanical properties, constitutive model

CLC Number: 

  • TU528
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