Evaluation of conductive concrete made with steel slag aggregates

Abstract

The incorporation of black steel slag (waste from steel production) in concrete responds to a greater awareness of sustainability. In addition, it is capable of increasing electrical conductivity. The objective of this work is to achieve multifunctional concretes with higher mechanical performance and which can modify the electrical characteristics. In this work, natural aggregates have been replaced by different aggregates of steel slags from Spanish industries and the mechanical characteristics of compression, modulus of elasticity, indirect traction and electrical characteristics of these concretes have been studied with respect to reference mixtures. Encouraging results have been obtained for concrete with slag and metallic fibers, improving the electrical conductive capacity by almost 70% and improving the mechanical performance by 14%.

The authors acknowledge the financial support provided by the project PID2019-106555RB-I00. The first author acknowledges the financial support from Agència de Gestió d'Ajuts Universitaris i de Recerca (AGAUR), with the doctoral fellowship: Personal investigador novell (FI) 2021. We would also like to thank the following companies: Promsa, Sidenor, Calcinor, Hormor and Adec for supplying the slag, without which this study would not be possible.

Peer Reviewed

Postprint (published version)