▎ 摘　　要

NOVELTY - Cement-based composite material comprises 180-250 pts. wt. cement, 80-115 pts. wt. water, 360-450 pts. wt. fine aggregate, 2-8 pts. wt. chemically modified graphene oxide (CGO) and 1-3 pts. wt. dispersant. USE - Cement-based composite material used for preparing cement-based mortar (claimed). ADVANTAGE - The cement-based composite material helps in improving chloride ion permeability resistance of cement-based mortar, compressive strength and anti-folding comprehensive performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing cement-based mortar based on cement-based composite material, which involves: (A) taking CGO powder to prepare CGO suspension; (B) adding dispersant to prepared CGO suspension, and performing ultrasonic treatment to obtain CGO suspension mixture; (C) adding cement, sand, water, CGO suspension mixture, and remaining aqueous solution to mixer for mixing; and (D) mixing to obtain CGO-enhanced cement-based mortar.