STUDY ON THE MECHANICAL PROPERTIES AND MICROSTRUCTURE OF CHOPPED CARBON FIBER REINFORCED SELF COMPACTING CONCRETE

As compared to conventional concrete the benefits of SCC comprising more strength like non SCC, may be higher due to better compaction, similar tensile strength like non SCC, modulus of elasticity may be slightly lower because of higher paste, slightly higher creep due to paste, shrinkage as normal concrete, better bond strength, fire resistance similar as non SCC, durability better for better surface concrete. Incorporation of fibers further enhances its properties specially related to post crack behavior of SCC. The fibers used in the study are 12 mm long chopped glass fiber and carbon fiber. The volume fraction of fiber taken is 0%, 0.1%, 0.15%, 0.2%. The project comprised of two stages. First stage consisted of development of SCC mix design of M30 grade and in the second stage, different fibers like Glass and carbon Fibers are added to the SCC mixes and their fresh and hardened properties were determined and compared. The study showed remarkable improvements in all properties of self-compacting concrete by adding fibers of different types and volume fractions. Carbon FRSCC exhibited best performance followed by glass FRSCC in hardened state.