Abstract:
Cement is a very effective and old binding material used in concrete for years. The
basic ingredient of cement is limestone i-e CaCO3 (calcium carbonate). Cement has
an inherited problem that a lot of carbon dioxide gas is evolved, when CaCO3 is
heated in the kiln, which is very harmful to our society and environment.
The purpose of this project / research work is to make efforts and suggest ways to
minimize the use of cement in concrete and to find a best suitable replacement
which not only enhances the compressive strength of concrete but also increases its
other properties. Therefore, towards the attainment of this goal, GGBS is one of the
option we found.
First of all we calculated optimum ratio at which cement can be replaced by slag in
concrete that gives maximum compressive strength which was 30%. Then, by using
this replacement factor, we determined the flexure strength, tensile strength,
sulphate resistance and strain value of slag-cement concrete. Finally, the results of
slag-cement concrete were compared with that of cement concrete.
At the end, after the comparative study, we found GGBS (ground granulated blast
