| Title |
Shear Performance of Reinforced Concrete Beams Utilized Mixed Recycled Coarse Aggregates |
| Authors |
Lee Young-Oh ; Yun Hyun-Do ; You Young-Chan ; Kim Keung-Hwan |
| Keywords |
Shear Strength ; Mixed Recycled Aggregates ; Reinforced Concrete Beams ; Failure Mode |
| Abstract |
This paper focuses on the possibility of the use of recycled aggregate concrete as a structural material and estimated of using a mixed recycled aggregates. Shear behavior of reinforced recycled concrete beams are investigated experimentally in order to estimate to establishing design code for shear by comparing with that of reinforced concrete beam made of nature aggregate. For that purpose an experimental study of the shear behaviour and strength of beams made with recycled aggregate concrete was studied. Six specimens with the same compression strength, four specimens mixtures using different percentages of mixed recycled coarse aggregates(0, 30, 60 and 100%) and stirrup is not reinforced. Other specimens are produced using 0 and 100% of mixed recycled coarse aggregates and stirrup is reinforced. Analytical predictions of the experimental results were carried out using a numerical model based on the KCI, JSCE, CSA, Zsutty and MCFT. Experimental result indicate that recycled concrete beams without stirrup is increased in shear strength by 20∼30% and empirical design code underestimates the shear strength of recycled aggregate concrete. Also, Recycled concrete beams with stirrup is increased in shear strength by 10%. Zsutty and MCFT(Modified Compression Field Theory) codes overestimates the ultimate shear strength of beams by 8%. |