▎ 摘　　要

NOVELTY - An added rare earth tailing polycarboxylic acid high efficiency water reducing agent comprises 240-250 pts. wt. isopentenyl ether, 25.2-26.0 pts. wt. acrylic acid, 1.6-1.65 pts. wt. ammonium persulfate, 0.53-0.55 pt. wt. mercaptoacetic acid, 13-14 pts. wt. lignin, 10 wt.% sodium hydroxide solution, deionized water, 26-28 pts. wt. graphene oxide, 2-3 pts. wt. sodium dodecyl benzene sulfonate, 11-13 pts. wt. rare earth tailing, 0.6-0.7 pt. wt. sodium hexametaphosphate, 0.3-0.4 pt. wt. trimeric sodium phosphate, 2-3 pts. wt. cerium nitrate, and 4-5 pts. wt. ethylene vinyl acetate latex. USE - Added rare earth tailing polycarboxylic acid high efficiency water reducing agent. ADVANTAGE - The agent reduces defect caused due to insufficient strength in industrial production, and improves cement product grain boundary energy, intensity and durability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of added rare earth tailing polycarboxylic acid high efficiency water reducing agent comprising: (A) adding graphene oxide with deionized water for 4-5 times, putting into ultrasonic oscillator, ultrasonically processing for 30-40 minutes, uniformly dispersing, water bath heating at 60-80 degrees C, adding lignin, and uniformly stirring and dispersing to form mixture; (B) adding isopentenyl ether with deionized water, stirring and heating at 60-70 degrees C, adding ammonium persulfate, dripping acrylic acid, mercaptoacetic acid and (A), controlling for 3-3.5 hours, continuously heat preserving for 60-90 minutes, adding 10 wt.% sodium hydroxide solution to neutralize, adjusting pH value to neutral, and controlling solid content to 40-45%; (C) putting rare earth tailing into oven at 90-100 degrees C, putting into ball mill, adding sodium hexametaphosphate, mixing and milling for 40-60 minutes, discharging mixed material, adding deionized water for 2-3 times, uniformly stirring, continuously adding remaining components, and uniformly stirring and dispersing at speed of 500-600 revolutions/minute (rpm); and (D) mixing with (B), stirring into stirring kettle at speed of 600-800 rpm, and uniformly mixing and dispersing.