High-flow-state ultra-high performance concrete and preparation method thereof

• Main Authors: SHU BENAN, REN YANFEI, ZHENG LISHANG, ZHU MAOCONG, ZHOU MIN, GUO LIXIAN, QIU WENJUN, YANG TENGYU, CHEN JIANGANG, ZENG GUODONG, QIU BING, LI YONGLING
• Format: Patent
• Language: Chinese; English
• Published: 01.03.2024
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention relates to the technical field of concrete building materials, in particular to high-flow-state ultra-high-performance concrete and a preparation method thereof. Comprising the following components in parts by weight: 60-85 parts of cement, 20-40 parts of silica fume, 2-15 parts of fly ash, 85-113 parts of quartz machine-made sand, 1-3 parts of steel fibers, 1-4 parts of a water reducing agent, 0.2-0.6 part of sodium gluconate, 18-26 parts of water and 8-20 parts of modified silicon dioxide nanoparticles. The modified silicon dioxide nano-microsphere is of a hollow porous structure. The prepared ultra-high performance concrete is high in fluidity, low in viscosity, small in shrinkage amount and excellent in mechanical property. 本发明涉及混凝土建筑材料技术领域，尤其涉及一种高流态的超高性能混凝土及其制备方法，包括以下重量份的成分：水泥60-85份、硅灰20-40份、粉煤灰2-15份、石英机制砂85-113份、钢纤维1-3份、减水剂1-4份、葡萄糖酸钠0.2-0.6份、水18-26份和改性二氧化硅纳米微球8-20份；所述改性二氧化硅纳米微球为中空多孔结构。本发明制备所得的超高性能混凝土，其流动性高、粘度低、收缩量小且力学性能优秀。