▎ 摘　　要

NOVELTY - High temperature and crack resistant concrete comprises 60-80 pts. wt. river sand, 100-120 pts. wt. gravel, 50-70 pts. wt. cement, 10-20 pts. wt. water, 2-6 pts. wt. nano titanium dioxide, 10-16 pts. wt. nano silicon dioxide, 16-20 pts. wt. nano carbon fiber, 3-5 pts. wt. fly ash, 3-5 pts. wt. ethylene-vinyl acetate emulsion, 1-5 pts. wt. graphene, and 2-6 pts. wt. naphthalene water reducing agent. USE - Used as the high temperature and crack resistant concrete. ADVANTAGE - The concrete: has high temperature resistance and compressive strength, high brittleness, high toughness, and has high durability; and reduces the generation of micro-cracks. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing high temperature and crack resistant concrete comprising (a) dissolving naphthalene-based water reducing agent in water, then adding graphene, performing ultrasonic treatment, and dispersing the graphene for dissolving completely to obtain graphene solution, (b) adding ethylene-vinyl acetate emulsion to graphene solution, stirring uniformly, and ultrasonically treating to obtain mixed solution, (c) adding mixed solution to mixing bin of the concrete production equipment, then adding nano titanium dioxide, nano silicon dioxide, and nano carbon fiber into mixed solution, starting the first mixing motor, running the first hybrid motor through first driving pulley and first driven pulley for driving the linkage rod to rotate, then driving the transmission sleeve by linkage rod for rotating through driving bevel gear, and driven bevel gear, driving the rotating frame for rotate, then driving the rotating stirring shaft, fixed stirring shaft, first scraper, second scraper, and third scraper for rotating around the installation tube, (d) starting the second hybrid motor for running through second driving pulley for driving the transmission rod to rotate, and then driving the rotating stirring shaft for rotating through driving sprocket and driven sprocket, (e) combining the rotating rotating stirring shaft, fixed stirring shaft, first scraper, second scraper and third scraper with nano titanium dioxide, stirring the nano-silicon dioxide and nano-carbon fiber and mixing uniformly to obtain a mixture, (f) adding cement and fly ash into feeding box, starting the conveying motor, then operating the conveying motor for driving the screw conveying rod for rotating, then conveying the cement and fly ash upwards and adding them to mixing bin from discharge nozzle, (g) adding river sand and gravel to feeding box, transporting them to mixing bin through rotating screw conveying rod, and then mixing mixture, cement, fly ash, river sand and gravel uniformly to obtain semi-finished concrete, (h) starting the discharge cylinder, extending the movable rod of discharge cylinder for driving discharge plate for rotating, moving the discharge plate away from the bottom of mixing bin for releasing semi-finished concrete into storage bin, and (i) starting ultrasonic generator, and ultrasonically treating the semi-finished concrete by ultrasonic transducer.