High-volume impervious iron tailing sand concrete and preparation method thereof

The invention discloses high-volume impervious iron tailing sand concrete which comprises cement, silica fume, broken stone, river sand, iron tailing sand, a naphthalene water reducer, polypropylene fibers and water. The invention also provides a preparation method of the high-volume anti-permeability iron tailing sand concrete. The preparation method comprises the following steps: screening and cleaning an iron tailing sand mixed material; sequentially weighing the combinations according to the mass; the cement, the silica fume, the gravel, the river sand, the iron tailing sand, the naphthalene water reducer and the polypropylene fiber are sequentially poured into a stirring machine to be subjected to dry stirring for 0.5-1.5 min; 60% of water is poured into a stirring machine to be stirred for 0.5-1.5 min, then 40% of water is poured into the stirring machine to be stirred for 1.5-4 min, and the water is fully and evenly stirred; the formed final mixture is added into a mold in two times, and after each tim