▎ 摘　　要

NOVELTY - High slump retention polycarboxylic acid water reducing agent comprises 200-250 pts. wt. ethylene-glycol monovinyl polyethylene glycol (EPEG) macromonomer, 20-30 pts. wt. acrylic acid, 10-20 pts. wt. slump-retaining functional monomer, 0.5-0.6 pts. wt. sodium formaldehyde sulfoxylate, 3-4 pts. wt. hydrogen peroxide and 0.6-0.8 pts. wt. mercaptoacetic acid. The slump-retaining functional monomer is esterified graphene oxide modified with polyethylene glycol diacrylate. USE - Used as high slump retention polycarboxylic acid water reducing agent. ADVANTAGE - The high-slump retention polycarboxylic acid water reducing agent has high slump retaining performance, and improved slump retention. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of the high-slump retention polycarboxylic acid water reducing agent.