▎ 摘　　要

NOVELTY - Water reducing agent comprise 240-250 pts. wt. isobutyl alcohol polyoxyethylene ether, 25.2-26.0 pts. wt. acrylic acid, 1.6-1.65 pts. wt. ammonium persulfate, 0.53-0.55 pts. wt. mercaptoacetic acid, 13-14 pts. wt. lignin, 10wt.% sodium hydroxide solution, 26-28 pts. wt. graphene oxide, 3-4 pts. wt. polyethylene glycol, 4-5 pts. wt. carbon black, 4-5 pts. wt. metakaolin, 6-8 pts. wt. slag powder, 3-4 pts. wt. polyvinyl alcohol, 2-3 pts. wt. molasses, 3.5-4 pts. wt. calcium lignosulphonate, and proper amount of dionized water. USE - Water reducing agent for improving adhesiveness of concrete (claimed). ADVANTAGE - The water reducing agent improves viscosity and strength of cement, reduces amount of cement, and improves performance of concrete. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing water-reducing agent, which involves: (A) subjecting oxidation of graphene by adding 4-5 times amount of deionized water, and subjected to ultrasonic oscillation in oscillator for 30-40 minutes to obtain graphene oxide dispersion, and heating graphene oxide dispersion in a water bath at 60-80 degrees C, and adding lignin, and mixing uniformly to form mixture; (B) adding isobutyl alcohol polyoxyethylene ether with proper amount of deionized water in reactor and stirring at 60-70 degrees C, and adding ammonium persulfate, acrylic acid, and mercaptoacetic acid, and adding obtained mixture dropwise into it for 3-3.5 hours, and heating it for 60-90 minutes, and adding sodium hydroxide solution to adjust its pH value to neutral, and has solid content of 40-45% to obtain neutralized material; (C) subjecting calcination of metakaolin in a calciner at 700-750 degrees C for 2 hours, and cooling to room temperature, and mixing with slag powder, and carbon black, and putting it ball mill for 60-90 minutes to obtain mixed powder, and dissolving polyvinyl alcohol in 8-10 times deionized water, and adding obtained mixed powder and stirring at rate of 300-400 revolutions per minute for 20-30 minutes, and adding remaining materials are added and stirred at speed to 600-800 revolutions per minute for uniform dispersion; and (D) mixing obtained products, and placing obtained products in stirred tank, and stirring at speed of 600-800 revolutions per minute to obtain final product.