Evaluation of performance-based characteristics in high-performance concrete modified with ferro slag aggregates and admixtures

ABSTRACT

Newly developed high-performance concrete (HPC) is a revolutionary building material with superior mechanical properties and enhanced durability. Researchers have optimized HPC by incorporating industrial byproducts like modified ferro slag, silica fume, and fly ash, promoting sustainability and reducing carbon emissions. This paper analyzes the mechanical characteristics of HPC using the American Concrete Institute (ACI-211.1-91) guidelines, substituting cement with 17% fly ash (FA) and 10% silica fume (SF), and replacing coarse aggregate with up to 40% modified ferro slag. M60 grade was adopted for all mixes. Experimental tests assessed compressive strength (CS), split tensile strength (STS), and flexural strength (FS). Results showed significant improvements, with CS surpassing conventional HPC mixes by up to 25%. The highest CS, STS, and FS were observed with 30% modified ferro slag, achieving 10%, 6%, and 9% increases, respectively, at 28 days. These improvements indicate enhanced structural integrity and resistance to cracking. Utilizing industrial byproducts in HPC not only boosts performance but also supports sustainable construction by reducing waste and conserving natural resources.

Keywords:
High performance concrete; Silica fumes; Flyash; Ferro slag; Compressive strength; Split tensile strength; Flexural strength; Modulus of elasticity