Collaboration between constructional materials is the basis for superior structural performance. The inherent inferior properties of recycled aggregate concrete weaken the bond performance with steel tubes. This study investigated several methods to enhance the bond behavior between recycled aggregate concrete and steel tubes, for instance adding steel fibers, adjusting the water-binder ratio, introducing expansive cement, and thickening the steel tube. A repeated push-out test for 36 specimens was also conducted. The experimental results demonstrate that the undesirable impacts of recycled aggregate on the bond strength are offset by steel fibers and self-stress. Adding steel fibers simultaneously delays the decrease in bond strength during cycle loading. The benefit of self-stress relies on the steel tube thickness. The thicker steel tube is, the more remarkable the benefit becomes. Meanwhile, a predicted formulas is proposed, and gives the reasonable prediction of the bond strength between recycled aggregate concrete and steel tube.

建筑材料之间的协作是卓越的结构性能的基础。再生骨料混凝土固有的劣质性削弱了与钢管的粘结性能。这项研究研究了几种增强再生骨料混凝土与钢管之间粘结性能的方法，例如添加钢纤维，调节水粘结剂的比例，引入膨胀水泥和使钢管增厚。还对36个样本进行了重复推出测试。实验结果表明，钢纤维和自应力抵消了再生骨料对粘结强度的不良影响。同时添加钢纤维可延缓循环加载过程中粘结强度的降低。自应力的好处取决于钢管的厚度。较粗的钢管是 收益越显着。同时，提出了预测公式，对再生骨料混凝土与钢管之间的粘结强度给出了合理的预测。