This paper presents the torsion behaviour of basalt fibre reinforced recycle aggregate concrete. Total ten mixes are taken for experimental work among them, 5 mixes with basalt fibres and other 5 mixes without basalt fibres. The recycled concrete aggregate was used in the mix as replacement to the natural aggregate in the proportion of 0,25,50,75 and 100%. In addition to the torsion behaviour for various mixes, the compressive and split tensile strengths are evaluated. The strength parameters of recycled aggregate concrete (RAC) were compared with natural aggregate concrete(NAC), From the test results it is observed that compressive, split tensile and torsion strengths of RAC are increased up to 50% replacement of recycled aggregate. Due to addition of basalt fibres for RAC mixes, strengths are increased and more effectiveness is observed for 50% RAC mix. Regression model is developed to estimate the torsional shear strength for rectangular beam as function of compressive strength.
