▎ 摘　　要

NOVELTY - Coal-based metakaolin-oxidized graphene cement mortar composite material comprises 100-90 pts. wt. cement, 200 pts. wt. standard sand, 0.06 pts. wt. oxidized graphene, 0-10 pts. wt. coal-based metakaolin and 0.11-0.32 pts. wt. water reducing agent. The ratio of water to glue in the raw material of the composite material is 0.4. USE - Coal-based metakaolin-oxidized graphene cement mortar composite material. ADVANTAGE - The coal-based metakaolin-oxidized graphene cement mortar composite material has the effect of improving the dispersion of graphene oxide for the cement mortar mixed with graphene oxide (GO), and helps to improve the interface bonding force of GO and the hydration product in the GO mixed cement mortar, exert the nucleation effect of GO, promotes the secondary hydration of cement, and show obvious synergistic effect and gain effect in terms of strength. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of coal-based metakaolin-oxidized graphene cement mortar composite material, which involves preparing the coal-based metakaolin-oxidized graphene suspension, using ultrasonic dispersion instrument to ultrasonic the diluted oxidized graphene solution and water reducing agent, ensuring good dispersion of the oxidation graphene, mixing and stirring the coal-based metakaolin with the ultrasonically dispersed oxidized graphene, preparing by coal-based metakaolin-oxidized graphene cement mortar composite material, adding the standard sand into the stirring funnel, adding the coal series metakaolin-oxidized graphene suspension into the stirring pot, then adding cement, putting the pot on the fixing frame, and lifting to the fixed position, stirring for 30 seconds at low speed uniformly, adding sand, then stirring for 30 seconds, and collecting any material collected on the pot side and the blade to the pot then in the remaining time of the interval covering the pot with a cover, stirring for 60 seconds, mixing the cement mortar, pouring the fresh cement mortar into the steel mold, compacting by standard vibration platform, and sealing the mould with polyethylene nano-sheet to prevent water from escaping.