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A new beam-type specimen is studied and fabricated, in order to investigate the bond-slip behavior between rebars and recycled concrete. The beam-type specimen includes left part and right part with different anchorage length of rebars. By using this device, the bond slip performance tests of 10 beam specimens and 20 beam segments are completed. The effect factors of the bond slip behavior of reinforced concrete and recycled concrete are analyzed. The bond slip curves are fitted, and the bond-slip constitutive model is constructed. Research shows that:The recycled aggregate replacement ratio, concrete strength, type of rebar, anchorage length of rebar and the diameter of rebarare are the key factors affecting the bond-slip behavior. Compared with the concrete in which fine aggregate is the natural sand and the replacement ratio of recycled coarse aggregate is 33% - 66% , the bond strength of the rebar and 100% recycled concrete is obviously decreased. Compared with the plain steel,the bond strength between deformed rebar and concrete is significantly increased. The bond strength decreases with the in-crease of the anchorage length. When the relative anchorage length is same, the bond strength increases with the decrease of the rebar diameter. © 2017 Science Press. All rights reserved.
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