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对8根钢管再生混凝土柱界面粘结性能进行研究,探讨再生骨料取代率及再生混凝土强度对钢管再生混凝土界面粘结性能的影响.结果表明:钢管再生混凝土荷载-滑移曲线大致经历无滑移阶段、应力上升段、应力下降段等3个阶段,不同再生骨料取代率的钢管再生混凝土荷载-滑移曲线具有类似的特征;再生骨料的取代率对钢管与再生混凝土界面粘结强度影响显著,再生骨料取代率越高,界面粘结强度越低;再生混凝土强度对钢管再生混凝土强度有一定影响,随着再生混凝土强度提升,粘结强度逐渐增加,但增幅逐渐降低.
The interfacial adhesion of recycled concrete columns with eight steel tubes was studied to investigate the effect of recycled aggregate replacement ratio and recycled concrete strength on interfacial adhesion properties of recycled concrete. The results show that the load-slip curves of recycled concrete Load-slip curve of steel-tube recycled concrete with different replacement rates of recycled aggregates has similar characteristics in three stages, that is, ascending stage, ascending stage, ascending stage and as stress decreasing stage. The interfacial adhesion strength between recycled aggregate and recycled aggregate concrete The strength of recycled concrete has a certain impact, with the strength of recycled concrete, the bond strength gradually increased, but the increase gradually decreased.