▎ 摘　　要

NOVELTY - Waterproof material comprises 10-20 pts. wt. graphene, 10-20 pts. wt. cement, 18-28 pts. wt. sand, 18-28 pts. wt. water, 12-18 pts. wt. asphalt and 4-6 pts. wt. calcium oxide. USE - The material is useful for cement pipelines (claimed). ADVANTAGE - The material: has excellent trapping effect; and prevents the poor leakage of cement pipeline. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the waterproof material comprises (i) taking raw material according to the above-mentioned composition, (ii) firstly, crushing the sandstone by the crusher, grinding through the grinder to obtain a sandstone powder with particle size less than 0.6 mm, (iii) grinding the graphene powder and the sandstone powder together in a planetary ball mill for 30-40 minutes, sieving with 150-220 meshes screen to obtain a graphene fine powder and sand stone fine powder, and (iv) mixing the cement and calcium oxide with water, adding asphalt, graphene fine powder and sand stone fine powder slurry and mixing for 30-40 minutes with a mixer.