▎ 摘　　要

NOVELTY - Repairing material comprises 350-450 pts. wt. cement P. O52.5, 300-400 pts. wt. fine sand, 10-20 pts. wt. silicon ash, 3-5 pts. wt. cellulose, 1-3 pts. wt. starch ether, 20-25 pts. wt. dispersed latex powder, 5-10 pts. wt. calcium formate, 10-12 pts. wt. diethylenetriamine and 150-300 pts. wt. heavy calcium. The reinforcing agent is prepared by adding sodium nitrate into the concentrated sulphuric acid, stirring and adding graphene and potassium permanganate, preserving temperature and reacting, then adding de-ionized water, preserving temperature and reacting, adding hydrogen peroxide, continuously preserving temperature and reacting. USE - Repairing material for surface micro-crack of prefabricated component. ADVANTAGE - The repairing material has anti-aging effect, so that the repairing material in the long time use process will not appear aging phenomenon, ensuring the normal use of the prefabricated component. DETAILED DESCRIPTION - Repairing material comprises 350-450 pts. wt. cement P. O52.5, 300-400 pts. wt. fine sand, 10-20 pts. wt. silicon ash, 3-5 pts. wt. cellulose, 1-3 pts. wt. starch ether, 20-25 pts. wt. dispersed latex powder, 5-10 pts. wt. calcium formate, 10-12 pts. wt. diethylenetriamine and 150-300 pts. wt. heavy calcium. The reinforcing agent is prepared by adding sodium nitrate into the concentrated sulphuric acid, stirring and adding graphene and potassium permanganate, preserving temperature and reacting, then adding de-ionized water, preserving temperature and reacting, adding hydrogen peroxide, continuously preserving temperature and reacting, centrifuging and removing the supernatant, washing the substrate water to neutral to obtain graphene oxide, adding the graphene oxide into tetrabutyl titanate and ethanol, after stirring, adding acetic acid, heating and reacting, filtering to remove the filtrate, roasting the filter cake, preparing the modified graphene, adding m-methyl phenol, 2, -hydroxy-4 - methyl benzoic acid, zinc chloride, phosphorus oxychloride, sulfolane into the reaction kettle, reacting to obtain the intermediate 1, adding intermediate 1, N-bromosuccinimide, benzoyl peroxide, carbon tetrachloride into the reaction kettle, reacting to obtain intermediate 2, the intermediate 2, potassium carbonate, tetrahydrofuran are mixed uniformly, adding tetraethylammonium bromide aqueous solution, reflux reaction to obtain intermediate 3, adding the epoxy resin E-51, intermediate 3, N, N-dimethyl formamide into the reaction kettle, stirring and adding potassium persulfate, heating and reacting, preparing the modified epoxy resin, modified epoxy resin, modified graphene, copper sulphate, N, N-dimethyl formamide, mixing uniformly, reacting to obtain the reinforcing agent.