Effect of electric arc furnace slag and magnetite materials on electromagnetic shielding properties in cementitious composites

Document Type

Journal Article

Publication Title

Magazine of Concrete Research


ICE Publishing


School of Engineering




Australian Research Council Discovery Project

Grant Number

ARC Number : DP180104035


Wanasinghe, D., Aslani, F., & Ma, G. (2023). Effect of electric arc furnace slag and magnetite materials on EMI shielding properties of cementitious composites. Magazine of Concrete Research, 75(9), 476-486.



To impart electromagnetic interference (EMI) shielding, electrically conductive and electromagnetic absorbing additives are generally used in cementitious composites. This research looks at the effect of adding electric arc furnace slag (EAFS) and heavyweight aggregates (HW) to cementitious composites to on EMI shielding with carbon fibres. Different percentages of both additives were added to a control mix to study the effect on mechanical, electrical conductivity, and EMI shielding properties. Results showed that optimal shielding was produced when both aggregate contents were 1.5 wt % each in their mixes, which was 5.18 dB for EAFS and 3.25 dB for HW mixes, within the frequency range of 30 MHz to 1.5 GHz. Hybrid mixes were fabricated by using 0.7 wt % of 12 mm carbon fibres and three different percentages of each aggregate. The optimal level of shielding was produced when the EAFS and HW contents were 1 wt % in combination with the carbon fibres. These optimal levels were 34.21 dB and 36.78 dB, respectively, within the 30 MHz to 1.5 GHz frequency range. Further increase in both types of aggregates showed a gradual reduction in the EMI shielding effectiveness.



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