Bond strength between the normal strength concrete (NSC) and ultra high performance concrete (UHPC) is determined through slant shear, split tensile and four point bending test. Test methods are selected based on failure criteria such as shear, tension and bending in the typical strengthened structural components. The parameters studied to determine the bond behaviour are surface preparation (chipping and grooving) and nature of bonding (fresh and hardened state of UHPC) are chosen based on the bond studies carried out by many researchers. However, numerical research is required to evaluate the performance of the composite members incorporated with various surface preparations. Hence, the experimental results of composites with different surface preparations are validated through numerical approach by predicting the maximum failure load. The maximum difference between the numerically predicted and the corresponding experimental value is about 12%. Scanned electron microscopic analysis has been performed to determine the morphology of bond surface.

通过斜切，劈裂拉伸和四点弯曲试验确定了普通强度混凝土（NSC）和超高性能混凝土（UHPC）之间的粘结强度。根据典型的加固结构部件中的剪切，拉伸和弯曲等破坏准则选择测试方法。为确定键合行为而研究的参数是表面准备（切屑和切槽），并且基于许多研究人员进行的键合研究，选择了键合的性质（UHPC的刚硬状态）。但是，需要进行数值研究来评估与各种表面处理剂结合的复合材料构件的性能。因此，通过数值方法通过预测最大破坏载荷，可以验证具有不同表面处理方法的复合材料的实验结果。数值预测值和相应的实验值之间的最大差约为12％。已经进行了扫描电子显微镜分析以确定结合表面的形态。