Use of Pond Ash (Waste) As Partial Replacement to Fine Aggregate in Self Compacting Concrete

SCC gained wide demand in the construction industries. For the self compacting concrete fresh properties must possess high fluidity, good cohesiveness and better performance. Specially formulated super-plasticizer is used to allow the design of concrete for its free flowing characteristics. In this paper I study the use of a mineral admixture such as Fly ash and Pond ash is used to ensure the required concrete properties. Taken a constant of 30% Fly ash in the mix and Six SCC mixes were prepared by partial substitution of Pond ash to a fine aggregate. Fresh properties & hardened properties of these concrete mixes were determined. The mix design is done at replacement levels of fine aggregate 0 to 100% (at an interval of 20%). The fresh properties tests are conducted are T-Slump, T500mm-slump, L-Box, U-Box, V-funnel & V5min-Funnel Test. Up to a 60% replacement all the values are within the limits as per EFNARC guidelines after 60% bleeding and segregation starts. For the Hardened properties, the cubical specimens are casted for compressive strength testing is of size150x150x150 mm and cylindrical specimen for split tensile strength is of size 150x300mm were prepared & cured and their compressive strength at 7, 14 & 28 days and split tensile strength was evaluated at 28days. The strength values are increased up 40% as increase in PA content after the 40% values decreased.