@article{Deng2026, 
author = {Daiqiang Deng and Zhen Hu and Fu Xu and Shuisheng Li and Guodong Cao and Xinxing Li},
title = {Study on Factors Affecting the Bonding Performance at the Interface of UHPC Composite Repair Specimens},
year = {2026},
journal = {Journal of Xinjiang University(Natural Science Edition in Chinese and English)},
volume = {43},
number = {2},
pages = {208-222},
keywords = {ultra-high-performance concrete, reinforcement and repair, composite specimens, interface bonding performance, micro-mechanism analysis},
url = {https://www.sciopen.com/article/10.13568/j.cnki.651094.651316.2025.10.13.0001},
doi = {10.13568/j.cnki.651094.651316.2025.10.13.0001},
abstract = {The bonding performance between UHPC (ultra-high-performance concrete) and existing concrete substrates is a critical factor in structural reinforcement and repair. This study experimentally investigates the effects of failure mode, matrix strength, interfacial roughness, and curing age on splitting tensile strength and double-sided shear strength, while analyzing the micro-mechanisms of the interfacial roughness group. Results indicate that: failure primarily occurs through interfacial delamination; increased matrix strength and curing age significantly enhance interfacial bond strength; interfacial bond strength continuously increases with rising interfacial roughness but stabilizes beyond RO2; top-pouring methods yield higher bond strength than side-pouring; the RO2 group achieves optimal interfacial bonding performance by balancing mechanical interlocking and chemical bonding through moderate roughness, forming a dense interfacial transition zone.}
}