High-performance concrete and preparation method thereof

The invention discloses a high-performance concrete, which comprises the following components: 390-420 kg/m of Portland cement, 118-135 kg/m of fly ash, 550-630 kg/m of sand, 1000-1150 kg/m of G5-20mm pebbles, 8.8-10.6 kg/m of an additive, 140-150 kg/m of water, and 2.4-3.2 kg/m of a porous hollow microbead-based internal curing agent. The surface and internal structures of the fly ash hollow microspheres are optimized and modified by adopting an organic acid corrosion method, and the fly ash hollow microspheres are used as a concrete internal curing agent, so that the cement hydration reaction progress is promoted, the compact filling effect is exerted, and the mechanical property, durability and the like of high-performance concrete are effectively improved; and the preparation cost is low, and the method is suitable for popularization and application. 发明公开了一种高性能混凝土，各组分及其含量包括：硅酸盐水泥390～420kg/m3，粉煤灰118～135kg/m3，砂550～630kg/m3，G5-20mm卵石1000～1150kg/m3，外加剂8.8～10.6kg/m3，水140～150kg/m3，多孔空心微珠基内养护剂2.4～3.2kg/m3。本发明采用有