CHLORIDE PENETRATION IN FLY ASH CONCRETE

T.Ch.Madhavi, S.Martin Luther, Senthil Velan, Prabhath Kumar, Swamy Raju, Deepak Mathur

Abstract: Concrete is a very widely used material for construction all over the world. Production of concrete needs usage of large quantities of cement. Production of cement involves release of Carbon dioxide into the environment. Hence, to reduce these emissions the most effective way is to replace cement with other materials. Fly ash is a promising replacement material for cement because of improvement in durability over long term. The penetrability of concrete is not desired and affects the durability of concrete so in this paper a detailed presentation of experimental investigations carried out is made. These investigations are carried out to evaluate the penetrability properties by Rapid Chloride Permeability Test of concrete specimens in which cement was partially replaced with Class F fly ash are presented. 30%, 40%, 50% and 60% percentages of Class F fly ash by weight and volume fractions are used to replace cement. Tests were performed for which chloride penetration was determined after 28 days and 90 days of curing. Test results indicate that the chloride penetration in concrete containing fly ash is reduced. With age the chloride penetration decreased upto 82.2% with addition of 60 % fly ash content after 90 days.

Keywords: Rapid Chloride Permeability Test, fly ash, chloride,

DOI: https://doi.org/10.15623/ijret.2015.0413023