关键词: 氧化石墨烯;PVA纤维;水泥基;耐久性

Abstract: In order to solve the problems of poor durability and brittleness of concrete,In this paper,the effect of graphene oxide(GO)blended with Polyvinyl alcohol(PVA)fiber on the durability of cement-based materials was studied.GO was prepared by Hummers method and the structure and properties of GO were characterized.The mechanical properties and durability of mortars with different mix ratio were tested and analyzed,and the modification mechanism of GO and PVA fibers on cement-based materials was analyzed by MIP(Mercury intrusion porosimetry)and SEM(scanning electron microscope).The results show that GO and PVA fiber can improve the mechanical properties and durability of cement-based materials.GO composite PVA fiber can significantly optimize the pore structure of cement-based materials,reduce porosity,improve the resistance to chloride ion penetration and reduce the shrinkage of cement-based materials.

Key words: graphene oxide;PVA fiber;cement-based;durability