Review on durability of FRP bar reinforced seawater sea-sand concrete materials and components
The application of fiber reinforced polymer(FRP)in seawater sea-sand concrete(SSC)can avoid the corrosin of steel bars induced by the chloride ion,but FRP reinforced seawater sea-sand concrete(FRP-SSC)structures still have durability issues in harsh environments,which is one of the hot and difficult issues of current research.Based on the existing literature,the durability of FRP bars,SSC and FRP-SSC components in marine environments was sorted out.The results show that under the combined effect of the alkaline environment of concrete and salt ions in seawater and sea-sand,the degradation and variability of mechanical properties of FRP bars increase,and the bonding strength of FRP bars and SSC decreases.The addition of salt ions in seawater and sea-sand accelerates the hydration reaction,thus improving the compactness and durability of SSC.The effect of marine environment leads to the deterioration of the mechanical properties of FRP and the reduction of bonding strength between FRP/steel-FRP composite bars(SFCB)and SSC,which weakens the bearing capacity of SSC components and changes the failure mode of SSC components.The bearing capacity of SSC components decrease with the increase of recycled coarse aggregate(RCA)replacement rate.It is suggested that the quantification of variability of mechanical property of FRP bars and SSC,and the time-dependent reliability-based design methods of components should be taken as the direction of further research in the future.
FRP bardurabilityseawater sea-sand concretetransformation of failure modesteel-FRP composite bar
万方数据
维普
