郭进军  王少波  张雷顺  张启明
    （郑州大学水环学院  郑州 450002）

[提要]  新老混凝土粘结面的抗剪切性能是衡量粘结性能的最为重要的指标之一。采用3年龄期的老混凝土，浇制了一批Z形新老混凝土粘结剪切试件和整体混凝土伴随剪切试件。通过试验研究，得出了不同强度的新混凝土和不同界面粗糙度对新老混凝土粘结剪切性能的影响规律，并利用双因素方差分析方法进行了进一步的论证。
[关键词]  新老混凝土粘结  粘结面  剪切强度  粗糙度  新混凝土

It is the critical problem in reinforcement projects of concrete structure that the property of bond between new and old concrete is good or bad. The shear property of interface between new and old concrete is one of the most important indexes to evaluate bonding property. This research takes three-year-old concrete to cast a serial of Z shape new-old concrete bonding specimens and integral concrete compared specimens. By shear testing investigation, the influencing regulations of different new concrete strength and different interface roughness on new-old concrete bonding shear property are obtained,and the double factors variance analysis is presented.
Keywords:  new-old concrete bond; bond interface; shear strength; roughness; new concrete