This study investigates the effect of fly ash (FA) and ground granulated blast furnace slag (GGBS) as partial
replacement of cement in the manufacture of concrete. Manufactured sand (M-sand) is used as fine aggregate in the place of
scarce river sand. The grade of concrete used is M20. The cube, cylindrical and prism specimens were cast and subjected to wet
curing. The compressive strength, split tensile strength and flexural strength of concrete specimen was tested at 28 days. The
experimental results indicated that replacement of cement by flyash resulted in decreasing the compressive strength and these
strength values falls below 20 MPa after 30% partial replacement of cement by flyash. Further, the flyash is partial replaced by
GGBS and then experimental tests were conducted. The cement concrete having binder proportions (50% cement, 30% flyash
and 20% GGBS) provides better mechanical performance and optimum results in economical considerations.
