▎ 摘　　要

NOVELTY - Preparation of modified graphene comprises mixing graphene oxide solution, soluble calcium salt and silicate, reacting, heating, stirring, and growing silicic acid on surface. USE - Method for preparing modified graphene used for graphene/cement composite material (all claimed). ADVANTAGE - The method has reduced calcium hydroxide generation. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the preparation of graphene/cement composite material comprising mixing modified graphene and water, adding cement, and mixing.