| Title |
The Effect of Replacement Ratio of Recycled Coarse Aggregate on Shear Strength of Reinforced Concrete Beams Without Shear Reinforcement |
| Authors |
Lee Won-Suk ; Yun Hyun-Do ; Kim Sun-Woo ; Choi Ki-Sun ; You Young-Chan ; Kim Keung-Hwan |
| Keywords |
Recycled Coarse Aggregates ; Replacement Ratio ; RC Beams ; Shear Strength ; Codes |
| Abstract |
The use of recycled aggregates is increasing due to problems of lack of natural aggregates. But there are no appropriate design recommendations and basic data for structural members using recycled aggregate concrete. Shear behavior of recycled coarse aggregate concrete (RCAC) beams are investigated experimentally in order to contribute to establishing design method for shear by comparing with that of reinforced concrete beam made of natural aggregate. Tests have been performed on recycled aggregates and on four concrete mixes (conventional concrete and recycled concrete with 30, 60 and 100% of recycled coarse aggregates). Eight full-scale reinforced concrete beams without shear reinforcement were made and tested to failure. The results showed that the deflections and the ultimate loads were little affected by the different types of concretes. Experimental results were compared with current codes and equation proposed by Zsutty. From the test, it is confirmed that shear strength of reinforced concrete beams is affected by compressive and tensile splitting strength of concrete, replacement ratio of recycled coarse aggregate, and specimen size. And the current codes predicted the shear strength of the recycled concrete well. |