Self Compacting Fiber Reinforced Concrete (SCFRC) is the one where fibres are added to the self compacting concrete, which is able to flow under its own weight, and completely fill the formwork and encapsulate the reinforcement, while maintaining homogeneity and can consolidate without the need for vibration compaction.
Self-compacting concrete is a new generation high performance concrete known for its excellent deformability and high resistance to segregation and bleeding.
SCFRC is an engineered material consisting of cement, aggregates, water and admixtures with or without several new constituents like colloidal silica, pozzolanic materials, Portland -flyash (PFA), ground granulated blast furnace slag (GGBS), microsilica, metakaolin and chemical admixtures.
By the inclusion of uniformly distributed, randomly oriented, short discrete fibres in concrete shear resistance is improved owing to an increase in tensile strength, which delays the formation and growth of cracks.
Also when smaller distance exists between fibres compared with that between stirrups, greater effectiveness in the crack-arresting mechanism and better distribution of tensile cracks is enabled.
Fibers also have the ability to bridge shear cracks, improving the post-cracking behavior. Therefore, the addition of fibers in adequate quantities may be effective at supplementing or even replacing the conventional shear reinforcement such as stirrups in concrete members.