Abstract
This experimental study is aimed at finding the effect of reducing the usage of conventional materials for concrete. The mechanical properties of modified concrete prepared with manufactured sand (M-sand), silica fume and steel fiber are tested and compared with that of conventional concrete. For modified concrete, cement is replaced by silica fume, river sand by manufactured sand and steel fibers are also added. The objective of using M-sand is to reduce the usage of river sand as it is becoming uneconomical in the field of construction. The benefits of using silica fume is to increase the strength of concrete. Steel fibers are added to concrete to increase the tensile strength of concrete. The percentage replacement of river sand by M sand is 40%, cement by silica fume is 5% and hooked end fibers are added at 0.6% to concrete mix during concrete mix preparations. The optimum value of % replacement is decided with the results obtained and it can be concluded that the use of unconventional materials in production of concrete can be encouraged.
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