This paper presents the utilization of the steel slag which is used as a replacement material for coarse aggregates of different sizes for different bituminous mix i.e. 37.5 mm down, 20 mm down, 12.5 mm down at different percentages. The gradation requirement was fulfilled at all the replacement percentages for the DBM grade-II. A various tests were executed to characterize the physical properties of aggregates, steel slag and bitumen. The chemical tests on steel slag also showed good result. Bituminous mixtures of virgin aggregates and replacement of steel slag were used to prepare Marshall Specimens and to determine optimum bitumen content. Mechanical characteristics of all the mixtures were evaluated by Marshall Stability and Indirect tensile strength tests. It is compared with the mixture containing virgin aggregates. All the mixtures with steel slag have satisfied the MoRT&H standards. It was observed that steel slag used as a coarse aggregate improved the mechanical properties of bituminous mixtures and thus resulting as suitable for use in the construction of road.
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