Effect of Corrosion on High-Strength Concrete with Steel Slag as Partial Replacement of Coarse Aggregate

¹ Department of Civil Engineering, CVR College of Engineering, Hyderabad, India
² Professor, Osmania University, Department of Civil Engineering, Hyderabad, Telangana, India.
³ Department of Civil Engineering, Central Queensland University, Sydney, Australia

^* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.

Published online: 3 August 2026

Abstract

The search for sustainable building materials has been prompted by the growing need for natural aggregates in concrete as well as the difficulties in disposing of industrial byproducts. Steel slag has physical properties similar to those of natural aggregates and can be used successfully in concrete. The durability performance of M70 grade high-strength concrete with steel slag added as a partial substitute for coarse aggregate at extra levels of 0%, 40%, 45%, 50%, and 55% is investigated in this study. The Rapid Chloride Permeability Test (RCPT) and Rapid Chloride Migration Test (RCMT) were used to assess the concrete’s resistance to chloride ion penetration. According to experimental findings, the migration coefficient and chloride permeability consistently decreased as the amount of steel slag increased. The concrete with 55% steel slag had the lowest migration coefficient and charge passed, indicating better durability and resistance to chloride infiltration. The results imply that steel slag can serve as a sustainable and efficient replacement for natural coarse aggregate in high-strength concrete, enhancing durability and encouraging the advantageous use of industrial waste.