Fiber-free composite toughened and reinforced ultra-high performance concrete and preparation method thereof

The invention discloses fiber-free composite toughened and reinforced ultra-high performance concrete and a preparation method. The fiber-free composite toughened and reinforced ultra-high performance concrete is prepared from the following components in parts by weight: 620 to 780 parts of cement, 50 to 130 parts of silica fume, 200 to 280 parts of limestone powder, 140 to 180 parts of a composite toughening material, 950 to 1050 parts of river sand, 6.5 to 7.5 parts of a water reducing agent and 190 to 210 parts of water, wherein the composite toughening material is prepared from the following components in parts by weight: 35 to 45 parts of tetragonal phase zirconium dioxide, 70 to 90 parts of redispersible waterborne polyurethane powder and 35 to 45 parts of nano silicon dioxide. The ultra-high performance concrete prepared by the method is high in breaking strength and good in working performance. 本发明公开了一种无纤维复合增韧强化的超高性能混凝土及制备方法，包括以下按重量份计的组分：水泥620-780份，硅灰50-130份，石灰石粉200-280份，复合增韧材料140-180份，河砂950-1050份，减水剂