Repairing performances of novel cement mortar modified with graphene oxide and polyacrylate polymer

Abstract Most cementitious repair materials have non-ignorable drawbacks such as low strength, insufficient bonding, and anti-permeability. Although the bonding anti-permeability of mortars modified by polymer will be substantially improved, compressive strength component integrity decreased. Hereby six groups cement varied dosages Graphene Oxide (GO) PA copolymer (GOPARMs) were prepared. The flexural ( f t ), c / , bond b chloride ion migration coefficient λ ) GOPARMs systematically studied axial compressive, three-bending, pull-out, RCM method, along with microstructure analysis. When GO are fixed at 0.03 5 wt%, respectively, reach best comprehensive performances, which 6.4, 46.5, 0.14, 6.73 MPa, 1.179 × 10 −12 m 2 /s. Compared control mortar, /f improved 5.7, 12.3, 7, 103%, corresponding is dramatically reduced 40.4%. Scanning electron microscope (SEM) shows that trace can play a template nucleation effect on hydration products’ morphology GOPARMs. Meanwhile, cured form hydrophobic film fill interfacial pores among products, finally superior repairing performances optimal mix achieved.