• 文献标题:   Plain Concrete Prisms Externally Strengthened by CFRP Bonded with Graphene Oxide-Modified Magnesium Phosphate Cement
  • 文献类型:   Article
  • 作  者:   LIU XF, LI Y
  • 作者关键词:   graphene oxide go, magnesium phosphate cement mpc, flexural behavior, mpccarbon fiber reinforced plastic mpccfrp
  • 出版物名称:   JOURNAL OF MATERIALS IN CIVIL ENGINEERING
  • ISSN:   0899-1561 EI 1943-5533
  • 通讯作者地址:   Beijing Univ Technol
  • 被引频次:   0
  • DOI:   10.1061/(ASCE)MT.1943-5533.0003134
  • 出版年:   2020

▎ 摘  要

Graphene oxide (GO)-modified magnesium phosphate cement (MPC) is used as an adhesive to bond carbon fiber-reinforced polymer (CFRP) composites in the formation of MPC-CFRP strengthening materials. The performance of GO-modified MPC paste and the mechanical performance of MPC-CFRP-strengthened concrete prisms are investigated in this paper. Workability and mechanical properties of MPC with different dosages of GO (0.035 wt% and 0.07 wt% by MgO) are tested. The results indicate that GO has negative effects on the fluidity and setting time of MPC. Mechanical properties of MPC are improved by a proper addition of GO. Compared with unstrengthened prisms, bearing capacity and stiffness of strengthened concrete prisms increase with the layers of MPC-CFRP: maximum bearing capacity increased by 372.08%, and stiffness increased by 130.15%, respectively. MPC with the optimal mechanical properties (MPC-GO1) is used as the adhesive to bond CFRP, which forms a new type of strengthening composite and greatly improves the bearing capacity and ductility of plain concrete prisms.