Properties of Self Compacting Concrete (SCC) Containing Different Pozzolanic Materials

Self Compacting Concrete (SCC) is a high performance concrete which can consolidate by its
own weight without mechanical vibrations into every part of the f01mwork while maintaining its
homogeneity. The objectives of this project are to determine the optimum dosage of
superplasticizer to satisfY the rheological requirements of sec according to the standard
practices in fresh state and to determine the optimum replacement of Pulverized Fly Ash (PFA)
and Silica Fume (SF) as substitute of cement on the basis of hardened concrete properties which
are compressive strength and porosity. This study shows the optimum dosage of Superplasicizer
(SP) to satisfY rheological requirements of SCC and optimum replacement of PF A and SF as
substitute of cement. Two main groups of SCC which are SCC without pozzolan and SCC with
pozzolan have been investigated. sec mix without pozzolan has been used to determine the mix
which has optimum amount of Superplasticizer (SP) which later will be used as main SCC mix
to test the optimum amount of pozzolan for SCC mix with pozzolan. From this study, it has been
found that the optimum amount of Superplasticizer to be used in Self Compacting Concrete
(SCC) is 2.5%, the optimum amount of Pulverized Fly Ash (PFA) as cement replacement
material in Self Compacting Concrete (SCC) is 5% and optimum amount of Silica Fume (SF) as
cement replacement material in Self Compacting Concrete (SCC) is 5%.