| Title |
The Shear Behavior of Reinforced High-strength Recycled-Aggregate Concrete Beams without Shear Reinforcements |
| Keywords |
Shear behavior ; High-strength Recycled-aggregate concrete beam ; Recycled-aggregate ; Shear span to depth ratio |
| Abstract |
The use of recycled-aggregate concrete is increasing faster than the development of appropriate design recommendations. In addition, recycled-aggregate and higher compressive strengths are two of the most desired characteristics to improve the use of concrete as a construction material. This paper reports limited experimental data on the shear behavior of reinforced high-strength recycled aggregate concrete beams without shear reinforcement. Ten beams were tested to determine their diagonal cracking and ultimate shear behavior. The variables in the test program were concrete strength (300, 500, 700kgf/cm2) and shear span to depth ratio (a/d = 2.0, 3.0, 4.0). Test results indicate that the ACI Building code shear strength prediction of Eq. (11-3) and (11-5) for high-strength recycled-aggregate concrete beam is conservative for all beams except beams with shear span to depth ratio, a/d, of 4. However Zsutty Equation for high-strength recycled aggregate concretes beam is unconservative for almost all beams. The beam with the higher compressive strength has a stiffer response in terms of load-deflection behavior and a higher ultimate strength. |