Abstract: Self compacting concrete is a concrete that flows under its own weight and it does not require any external compaction. And the fibers are added into the concrete for withstanding the propagation of cracks. This fibres are high resistivity against high tensile strength and temperature and to study this strength behavior of pet strap and sisal fibre self compacting reinforced concrete the various test specimens were casted such as cubes, cylinders and beams. In this experiment cement is replaced by 20% of fly ash. For a mix design proportion of 1:1.75:1.2 with a water cement ratio of 0.47 and In this experiment we are adding hybrid fibres like sisal and pet strap fibres with a  dosage of 0.5%, 1%, 1.5% and 2% were dispersed into the concrete of mix design M40 grade concrete.

Keywords: Compression test, Split tensile test, Flexural test, Sisal fibre, Pet strap fibre and Fly ash.

| DOI: 10.17148/IARJSET.2020.7710