▎ 摘　　要

NOVELTY - This invention discloses an amphoteric dispersing agent for graphene oxide(GO) in cementitious materials. PAC has the following chemical structure: Wherein m is an integer ranging from 10 to 5000; n is an integer ranging from 10 to 5000. R1 is H, NH4 or alkaline metal element; R2 is H, NH4 or alkaline metal element. PAC could make GO powder to be less aggregated in pore solutions. Addition of PAC in GO-contained cement pastes, mortars, or concrete could improve the compressive strength and flexural strength of the resulting cement-based materials. Therefore, PAC polymer is a good dispersant for dispersing GO powder in cement-based materials.