Abstract—Concrete is prepared by mixing various constituents like cement, aggregates, water, etc. which are economically available. Concrete is a composite material composed of granular materials like coarse aggregates embedded in a matrix and bound together with cement or binder which fills the space between the particles and glues those together (NSA, 1982). Production of sand and gravel has increased at an annual rate of less than 1 percent. In essence the amount of crushed stone to be produced in the next 20 years will equal the quantity of all stone produced during the previous century, i.e., about 36.5 billion metric tons. Therefore the use of alternative sources for natural aggregates is becoming increasingly important (NSA, 1982). In the present study the mechanical properties of concrete by replacing cement with different percentages of Silica fume and aggregate by different percentages of Steel slag are studied. The results thus obtained are analyzed using Regression analysis. Results indicated that the replacement of cement by silica fume to the extent of 15% exhibited improved mechanical properties. Further, it has been also observed that with 15% replacement of cement by silica fume and replacement of natural aggregates by steel slag aggregates to the extent of 25% to 50% have shown improved strength compared normal concrete i.e. the concrete with 0% silica fume and 0% steel slag aggregates. Regression analysis has been carried out to compare the experimental results.

Index Terms—Concrete, Steel slag, silica fume, properties of concrete, regression analysis

Cite: Devaraj P. Kumbar and V. D. Gundakalle, "A Study on Effect of Silica Fume on the Mechanical Properties of Steel Slag Aggregate Concrete," International Journal of Structural and Civil Engineering Research, Vol. 2, No. 1, pp. 47-62, February 2013.