复合材料科学与工程Issue(2)：117-128,12.DOI:10.19936/j.cnki.2096-8000.20250228.015
树脂预浸技术提升CFRP-混凝土界面力学性能研究
Improvement of CFRP-concrete interfacial performance by resin pre-coating method
摘要
Abstract
Although carbon fiber reinforced composites(CFRP)are widely used in strengthening of concrete structures,the strengthening effectiveness is often reduced,primarily due to premature damage in the weaker sub-surface of concrete.To address this issue,the study employed resin pre-coating(RPC)solutions with different con-centrations to treat the concrete surface and improve its mechanical properties.The effects of RPC treatment with volume concentrations from 10%to 50%on the load-carrying capacity,interfacial shear stress distribution and bond-slip relationship were analyzed.Besides,the enhancing mechanisms were elucidated.The results demonstrated that the epoxy resin can efficiently penetrate into the microcracks and voids in the concrete sub-surface based on the RPC treatment.The cured epoxy resin created interlocking action between the epoxy and concrete,effectively en-hancing the mechanical properties of the CFRP-concrete interface and modifying the failure mode.For the C40 con-crete tested in this paper,the RPC treatment with the volume concentration of 30%effectively prevented premature concrete destruction,maximizing the adhesive layer's strength.This resulted in a 78.4%increase in the load-car-rying capacity compared to the control group with no RPC treatment.Additionally,the interfacial shear strength and interfacial shear fracture energy increased by 71.7%and 3.66 times,respectively.关键词
树脂预浸技术(RPC技术)/表面处理/界面增强/CFRP-混凝土界面/外贴法/复合材料Key words
resin pre-coating/surface treatment/interfacial reinforcement/CFRP-concrete interface/exter-nally bonding method/composites引用本文复制引用
房恩惠,杨树桐,庞瑞阳,孙忠科,兰天..树脂预浸技术提升CFRP-混凝土界面力学性能研究[J].复合材料科学与工程,2025,(2):117-128,12.基金项目
国家自然科学基金项目(52178259) （52178259）
