An Experimental investigation on effect of Silica Fume and Steel Fibre on M30 Grade of Concrete

The present investigation carried out on concrete due to the effect of silica fume with and without steel fibers on ordinary Portland cement. In this study we used concrete mixes with Silica Fume of 0%, 4%, 8%and 12%, with addition of crimped steel fibers of diameter 0.5 mm Ø with a aspect ratio of 60, at various percentages as 0%, 0.5 %, 1.0 % and 1.5 % by the volume of concrete on M30 grade of concrete. The effect of mineral admixture (silica fume) as cement replacement material with and without steel fibers on mechanical properties were analyzed and compared with normal concrete. In comparison, with normal concrete the replacement of 4%, 8% and12% cement by silica fume showed 7.27%, 15.64%, 12.79% increase in compressive strength in 28 days of curing. . In comparison, with normal concrete the replacement of 4%, 8% and12% cement by silica fume showed 6.21%, 6.52%,6.36% increase in split tensile strength in 28 days of curing. In comparison, with normal concrete the replacement of 4%, 8% and12% cement by silica fume showed 14.59%,20.43%,19.70% increase in flexural strength in 28 days of curing. Present study aimed to conclusion that, in comparison with 0%, 4%, 8%and 12% of silica fume and 0%, 0.5 %, 1.0 % and 1.5 % steel fibers ,8% silica fume and 1.5% steel fibers was recognized as the best for both economical and strength aspects.