▎ 摘　　要

NOVELTY - Graphene oxide magnesium cracking agent comprises 6000-8000 pts. wt. magnesium oxide clinker, 1000-2000 pts. wt. polycarboxylic acid water reducing agent and 1-3 pts. wt. graphene oxide. USE - Used as graphene oxide magnesium cracking agent. ADVANTAGE - The agent: has simple preparation process and no toxicity; and enhance the crack resistance of concrete. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing graphene oxide magnesium cracking agent comprising (i) dissolving raw materials and mixing for 1-2 hours, (ii) mixing graphene oxide to be oxidized and polycarboxylic acid water reducing agent by a hydrogen bond and an attachment method, drying and then grinding into a powder until the specific surface area of the powder reaches 100-600 m2/kg, and (iii) mixing the powder obtained in step (ii) with magnesium oxide clinker to obtain final product, where specific surface area of the milled powder is 300 m2/kg.