Reinforcement design of composite pavement continuously reinforced with basalt fiber reinforced plastics bars

The crack control indicator formulae were deduced by the analytical method in order to control the transverse cracks in the continuously reinforced concrete (CRC) pavement structure resulting from the temperature drop and shrinkage effect. The validity of formulae was verified by finite element simulation. Then the effects of basalt fiber reinforced plastics (BFRP) bars material properties and reinforcement program on cracks were specifically analyzed. Results showed that analytical method results accorded with the finite element simulation, which can be used in the reinforcement design of CRC+AC (asphalt concrete) composite pavement reinforced with BFRP bars. The effect of BFRP bar elasticity modulus on crack spacing and width is significant. Thus the relatively high elastic modulus is required to reduce the crack width. The bond stiffness of BFRP bars has great impact on crack spacing and width and it shouldn't be less than 20 GPa/m. Small diameter and spacing reinforcement program is benefit to control cracks under the same reinforcement ratio. Meanwhile the reinforcement ratio shouldn't be less than 0.5%. Crack spacing and width control indicators should be increased to 2.0 m and 1.0 mm respectively by taking the corrosion resistance of BFRP into consideration. ©, 2014, Zhejiang University. All right reserved.