Investigation on Micro Silica and Fly Ash as a Partial Replacement Material in Self Compacting Concrete

Gajendra.L.Naik; Mr.E.Ramesh Babu

Volume : IV, Issue : VIII, August - 2014

Investigation on Micro Silica and Fly Ash as a Partial Replacement Material in Self Compacting Concrete

Gajendra. L. Naik, Mr. E. Ramesh Babu

Abstract :

Self–Compacting Concrete is an innovative concrete that does notrequire viation for placing and compaction. It is able to flow under its own weight, completely filling formwork and achieving full compaction, even in the presence of congested reinforcement. This paper presents an experimental investigation on strength aspects like compressive, flexural and split tensile strength of self–compacting concrete containing different mineral admixtures and workability tests for different mineral admixtures (slump, L–box, U–box, V–Funnel, J–ring and T50) are carried out. The methodology adopted is that mineral admixtures are replaced by 5 %, 10%, 15%, 20%, 25%, 30% and 35% for Portland cement and performance is measured and compared. The influence of mineral admixtures on the workability, compressive strength, splitting tensile strength and flexural strength of self–compacting concrete was investigated. The mix proportion is obtained as per the guidelines given by European Federation of producers and contractors of special products for. The following inferences were made; optimum dosage of super plasticizer enhanced the flow property of the concrete. As a result, overall improvements in the flow and filling ability of the self–compacting concrete were observed. It is observed that when mineral admixtures used in self–compacting concrete, can reduce the amount of super– plasticizer necessary to achieve a given fluidity