Design and Application of Polyurethane/Polyurea Protective Coating and Its Applicationto Surface Protection of Concrete

Based on synergistic effect of polyurethane and polyurea,a new kind of concrete composite protectivecoating was prepared,which can improve the performance of coating and the adhesion strength of interface.At thesame time,the physical and chemical properties of the protective coating such as mechanical properties,adhesion,corrosion resistance,impact resistance,ion permeability and freezing resistance were analyzed.The results show thatthe concrete protective coating has good physical and chemical properties,provides good protection to concrete.