▎ 摘　　要

NOVELTY - Graphene-cement-based conductive composite material comprises 50-60 pts. wt. cement, 20-30 pts. wt. water, 1-3 pts. wt. graphene, and 0.3-3 pts. wt. additives. USE - Graphene-cement-based conductive composite material. ADVANTAGE - The graphene-cement-based conductive composite material has characteristics of wide applicability, simple preparation method, convenient use, good conductivity, and stable electrical properties, solves the problem of the dispersibility and uniformity of graphene in cement. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene-cement-based conductive composite material, which involves: (A) weighing raw materials of corresponding quality, adding water and dispersant to the stirring tank of the high-speed disperser, stirring at 400-600 revolution per minute for 10-15 minutes, and then increasing stirring speed to 1200-1500 revolution per minute, adding graphene for use, stirring and mixing for 20-30 minutes until uniform to obtain water-based graphene mixture, adding aqueous graphene mixture to the circulating cylinder of the high-power ultrasonic dispersion system, turning on cooling circulating water of the ultrasonic dispersion system, and then vacuumizing ultrasonic dispersion system under vacuum of 0.1 megapascal, continuing ultrasonic dispersion for 4-6 hours to obtain aqueous graphene dispersion, adding aqueous graphene dispersion obtained and viscosity reducer into the circulating stirring cylinder of the high energy density medium stirring mill, and setting the speed of the stirrer to 400-600 revolution per minute, turning on the cooling circulating water system of the high energy density medium stirring mill, and then turning on the main engine of the high energy density medium stirring mill, adjusting the speed of the main engine to the maximum, and then turning on the feed pump and discharge pump for continuous cycle grinding, taking random samples every 30 minutes, measuring particle size distribution of the graphene dispersion, stop grinding until the particle size distribution D50 of less than or equal to 10 micrometer, filtering and discharging the material to obtain low-viscosity aqueous graphene dispersion, adding low-viscosity aqueous graphene dispersion obtained and defoamer prepared into mixing tank of the vacuum mixer, turning on the cooling circulating water system of the vacuum mixer, then starting mixer host, and setting the speed to 1000-1500 revolution per minute, stirring for 20-30 minutes under vacuum of 0.1 megapascal to obtain water-based graphene dispersion for cement-based conductive composite materials, adding water-based graphene dispersion for cement-based conductive composite materials obtained, cement, water-reducing agent, and moisture-proof agent into mixing tank of the cement slurry mixer, stirring; and (B) mixing at low speed first, and then quickly stirring to obtain graphene-cement-based conductive composite material.