EXPERIMENTAL STUDY ON SHEAR BEHAVIOR OF REINFORCED RECYCLED AGGREGATE CONCRETE BEAMS

The use of recycled aggregates (RA) for structural concrete in construction, to the maximum possible limit, is becoming a necessity more than a desire. One such mechanical property, shear resistance of recycled aggregate concrete (RAC) beams is an intensive area of research. Three parameters i.e. compressive strength, percentage of tension steel and shear span to depth ratio were considered. An attempt has been made to study shear strength of RA concrete beams of M 20 grade with 25 and 50 % weight replacement of natural aggregate (NA) with recycled aggregate (RA) for different shear span to depth ratios a/d = 1.5, 2.5 and 3.5 with 1 % tension steel without shear reinforcement and compare the test results with the available shear models. Seven shear models for comparison were considered namely ACI 318, Canadian Standard, IS Code, CEB-FIP Model, Zsutty Equation, Bazant Equation and Okamura and Higai equation.