▎ 摘　　要

NOVELTY - Micro-expanding injection molding sizing agent for tunnel lining vault with moulded pulp, wherein it comprises the following components: a gel component, composite graded quartz sand, graphene oxide modified mineral admixture, regulator, volume stability enhanced water reducing agent and water. Gel is made of 750-800 pts. wt. composite graded quartz sand, 900-1350 pts. wt. modified graphene oxide mineral admixture, 100-150 pts. wt. regulator, 8-10 pts. wt. volume stability, enhanced water reducing agent and 2-3 pts. wt. water. USE - Sizing agent for micro-expanding injection molding used in tunnel lining vault for molded pulp.