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| Summarization on bonding behaviors of ultra-high performance concrete and normal concrete |
| 1. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China； 2. State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China； 3. Guangxi Communications Design Group Co., Ltd., Nanning， Guangxi 530029, China |
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Abstract The mechanical properties and durability of the bonding interface between ultra-high performance concrete (UHPC) and normal concrete (NC) were compared and analyzed, and the research results in three aspects of influential factors, mechanical properties and durability of UHPC-NC bonding interface were also reviewed. The effects of fiber-reinforced mechanism, restrained shrinkage mechanism and freeze-thaw damage mechanism on the mechanical properties of UHPC-NC interface were investigated, and the bonding interface mechanical testing and durability testing method and test results were classified and discussed. The research results of UHPC-NC interface failure mode and mechanical properties were described, and the outlook of reinforcing deteriorative NC bridges by UHPC was also forecasted. The results show that UHPC fiber and interface treatment have significant effects on the interface bonding performance. The mechanical properties and the durability of the UHPC-NC bonding interface are significantly better than those of the NC-NC interface, and the durability of UHPC-NC bonding interface is the most superior.
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Received: 02 August 2018
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2020, Vol. 41 
