Bond plane is the tache of weakness for the new and old concrete bond structure when withstanding shear force and tension. Appropriate interfacial agent can improve bond strength.
当承受剪力和拉力时，粘结面是新老砼粘结结构受力的薄弱环节，使用合适的界面剂可以提高其粘结强度。
The influence of concentration of KH-570silane coupling agent solution to the pull-off bonding strength of concrete at the new-to-old interfacial layer was studied through experiment.
试验探讨了KH - 570硅烷偶联剂溶液浓度对新老混凝土粘结界面层拉拔强度的影响。
As interfacial agent, the mix of cement and fly ash can improve the adhesive shear strength. After planted reinforced bar, the shear strength of new and existing concrete increases greatly.
而在界面上植入抗剪钢筋后，能大幅度提高了新老混凝土的粘结抗剪强度。
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