DURABILITY STUDY ON BLENDED CEMENT CONCRETE WITH FLY ASH SILICA

Durability of concrete is defined as its ability to resist weathering action, chemical attack, abrasion or any other process of detorioration. It also includes the effects of quality and serviceability of concrete when exposed to sulphate and chloride attacks. It is the material of choice where strength, durability, impermeability, fire resistance and abrasion resistance are required. The main aim of the present study is to determine the compressive strength, split tensile strength, flexural strength of concrete mix of M30 grade, with partial replacement of cement with SILICA FUME and FLY-ASH. This study is mainly confined to evaluation of changes in compressive strength, split tensile strength, flexural strength and weight reduction in six different mixes of M30 Grade namely conventional aggregate concrete (CAC), concrete is made by replacing 15% of cement by Fly Ash and 5% Silica Fume(FSAC1),concrete is made by replacing 15% of cement by Silica Fume and 5% of Fly Ash(FSAC2), concrete is made by replacing 10% of cement by Fly Ash and 10%Silica Fume (FSAC3),concrete is made by replacing of cement by 12% Fly Ash and 8% of Silica Fume (FSAC4), concrete is made by replacing of cement by 8% Fly Ash and 12% of Silica Fume(FSAC5). The effect of 5% of H2SO4 on these concrete mixes are determined by immersing these cubes for 7days, 28days and in above solutions and the respective changes in both compressive strength, split tensile strength, flexural strength and weight reduction had observed and up to a major extent we can conclude concretes made by that Fly Ash and Silica Fume had good strength and durable properties compared to conventional aggregate in severe Environment