▎ 摘　　要

NOVELTY - A nano-modified ultra-high-strength steel fiber concrete comprises 370-420 pts. wt. silicate cement, 80-120 pts. wt. mineral powder, 30-50 pts. wt. fly ash beads, 30-60 pts. wt. silica fume, 12-20 pts. wt. high-performance water reducing agent, 40-160 pts. wt. steel fiber, 0.05-0.25 pt. wt. graphene oxide, 3-20 pts. wt. nano-silica, 600-800 pts. wt. sand, 900-1100 pts. wt. stones and 110-130 pts. wt. tap water. USE - Nano-modified ultra-high-strength steel fiber concrete. ADVANTAGE - The concrete has improved mechanical property, impermeability and durability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the concrete comprising dry mixing silicate cement, slag powder, fly ash beads, silica fume, nano-silica, sand and stones in concrete mixer, adding graphene oxide solution, water and high-performance water reducing agent, stirring for 1-4 minutes, sprinkling steel fiber, and stirring for 3-5 minutes.