Durability Studies on Ternary Blended Fiber Reinforced Self Compacting Concrete
Abstract
In the present investigation, three grades of (M40, M50 and M60) fiber reinforced self compacting concrete was prepared by using quartz sand, micro silica, Ground Granulated Blast-furnace Slag (GGBS)and fibers. Steel fibers were added in various proportions, namely, 0.5%, 1.0% and 1.5% by volume of concrete to examine the effect of fibers on fresh and durability properties. It is observed that the evaluated fresh properties such as slump flow, V-funnel, T50cm slump, and L-box for all the SCC mixes are within the limits suggested by EFNARC. In the present investigation, durability aspects such as (i) the effect of temperature on compressive strength and (ii) the effect of acid attack (5% HCl and 5% H2SO4) on compressive strength has been studied on several SCC mixes with and without fibers. The residual compressive strength has been determined after exposing the samples at 200°C, 400°C and 600°C for 4 Hrs., 8 Hrs., and 12 Hrs. duration.The results indicate that ternary blended steel fiber reinforced self compacting concrete mixes with steel fibers are more effective in resisting the temperature and acid attack. In general, it is observed that the residual compressive strength decreases with the increase of temperature and the effect of H2SO4 is significant than the HCl on the compressive strength.
