Study on bonding and sliding performance of nano-modified epoxy resin reinforced CFRP-concrete system
In order to study the effect of TiO2/OMMT/epoxy resin composite material on the bonding and sliding performance of CFRP-concrete interface,the ratio of TiO2/OMMT/epoxy composite material was optimized and applied to the double bond shear experiment of CFRP-concrete system.The results showed that when the content of TiO2+OMMT was 2wt％,the tensile strength,elongation at break and impact strength were 153.06％,159.09％and 159.19％of pure epoxy resin,respectively.When used as an adhesive in CFRP-concrete system,TiO2/OMMT/epoxy composite material enhanced the interface adhesion and load transfer between fiber and concrete matrix,thus improving the ultimate bearing capacity of the interface.Compared with the double-shear specimen using pure epoxy resin,the bond strength and interface fracture energy of CFRP-concrete interface were increased by 129.83％and 168.82％,respectively.
titanium dioxidemontmorillonitenano-modificationepoxy resincarbon fiber reinforced compositeconcretebond strengthinterface fracture energy
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