This paper explains the effective utilisation of Blast furnace slag (BFS) in civil engineering applications, in a direction to reduce its dumping which causes environmental pollution and also to save conventional materials for sustainable development. The proposed material was made by blending BFS and glass fibre (GF) with a binder such as ordinary Portland cement. GF used in the experimental study was of three different aspect ratios (AR) 461, 922 and 1844. For each aspect ratio experiments were per-formed by adding GF by 0.3, 0.6, 0.9 and 1.2% by weight with respect to BFS. The cement to blast fur-nace slag (C/BFS) ratio is taken 10% for the present study. The compressive strength of the newly devel-oped material was evaluated after curing of 7, 14 and 28 days respectively. The effect of various mix ratios on the density, compressive strength and initial tangent modulus was studied and results are incor-porated. The test results show that the density of geomaterial reduces marginally with the addition of GF from 0.3 to 1.2%. For all the aspect ratios and curing periods the mix ratio, 0.6% had shown maximum value for compressive strength. For all the mix ratio and curing period the mix made with GF aspect ratio 922 shown the maximum compressive strength. The initial tangent modulus value was found, maximum for 0.6% mix ratio and aspect ratio 922. A nonlinear relationship was found between compressive strength and mix ratios.
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