Citation :

Nilesh Lende, Smita Patil, Jessly Rajan, "Performance Evaluation of Self-Compacting Concrete Using Glass Granular Blast Furnace Slag Sand as a Partial Replacement for Manufactured Sand," International Journal of Engineering Trends and Technology (IJETT), vol. 74, no. 1, pp. 95-107, 2026. Crossref, https://doi.org/10.14445/22315381/IJETT-V74I1P107

Abstract

This paper explores the effect of Glass-Granular Blast-Furnace-Slag Sand (GGBFS sand) as a partial substitute for Manufactured Sand (M-Sand) in Self-Compacting Concrete (SCC). The purpose of the research was to determine an optimal replacement level, which would maximise performance and simultaneously lead to sustainability because of the use of industrial waste. Blends of GGBFS-sand substitutions were made in seven mixes with 0% to 60% GGBFS-sand substitutions, with a constant composition of OPC and GGBS ratio of 0.30 water-binder mix. The V-funnel, T50, slump-flow, and L-box tests, alongside evaluations of mechanical performance ( flexural strength, compressive, split-tensile, and modulus of elasticity) or durability (water permeability, chloride permeability, and acid resistance tests), were employed to examine the fresh properties. A digital microscopic analysis was done to read surface morphology and pore characteristics. Findings showed that 30% GGBFS-sand replacement showed the best balance in performance by giving an increment of 7% compressive strength and a decrease of 13% chloride charge passed as opposed to the control. The smoother and sub-angular texture and filler effect of slag sand were found to improve its flowability, decrease permeability, and refine surface morphology. At an above percentage of 40, excess fines formed higher viscosity and slightly reduced strength. The results affirm that GGBFS sand (when used under control) creates a stable, compact, durable concrete matrix that is self-compacting and provides efficiency in structure as well as environmental advantage. The material has high potential for sustainable construction, where workability, durability, and the saving of resources are equally important.

Keywords

Self-Compacting Concrete, GGBFS Sand, Manufactured Sand, Workability, Durability, Sustainable Concrete.

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