▎ 摘　　要

NOVELTY - Preparing modified graphene oxide comprises (i) adding silane coupling agent into mixed solvent composed of absolute ethyl alcohol and de-ionized water, pre-hydrolyzing under water bath condition to obtain pre-hydrolysis solution, (ii) adding graphene oxide into pre-hydrolysis solution, and ultrasonically dispersing uniformly, (iii) stirring dispersed solution under water bath condition, after stirring, cooling, filtering, using ethanol aqueous solution to wash filter residue to obtain modified graphene oxide, where the silane coupling agent is 3-aminopropyltriethoxysilane or methacryloxypropyltrimethoxysilane, in the mixed solvent, the mass ratio of absolute ethyl alcohol and de-ionized water is 1:1. USE - The modified graphene oxide is useful in preparing cement-based composite material (claimed). ADVANTAGE - The method: is simple. The graphene oxide: has good dispersing effect, mechanical property and construction performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for use method of modified graphene oxide in preparation of cement-based composite material.