Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention discloses concrete with high slump loss resistance and ultra-high performance and a preparation method thereof, and the concrete is prepared from the following components in percentage by mass: 27-38% of cement, 8.5-9.5% of silica fume, 39-49% of carborundum, 5.5-8% of steel fiber, 2-4% of a water reducing agent and 1-5% of a viscosity reducing and slump loss resistance agent. The viscosity-reducing slump-retaining agent is a mixture of a steady-state agent and a thiomolybdate/thiotungstate mixed dispersion. The preparation method comprises the following steps: (1) preparing a thiomolybdate/thiotungstate mixed dispersion; (2) weighing and stirring the cement, the silica fume and the carborundum in proportion to obtain a premix; (3) mixing a water reducing agent, the thiomolybdate/thiotungstate mixed dispersion, a stabilizing agent and water in a container, and uniformly stirring to obtain a liquid mixture; and (4) pouring the liquid mixture into the premix, uniformly stirring, adding steel fibers, and continuously stirring to obtain the high-slump-loss-resistant ultra-high-performance concrete slurry. The slump and retentivity of a concrete mixture can be improved, and the viscosity of a system is reduced.
本发明公开了一种高保坍超高性能混凝土及其制备方法，按质量百分比计，包括以下组分：水泥27～38%，硅灰8.5～9.5%，金刚砂39～49%，钢纤维5.5～8%，减水剂2～4%，降粘保坍剂1～5%；降粘保坍剂为稳态剂与硫钼酸盐/硫钨酸盐混合分散体的混合物。制备方法包括以下步骤：(1)制备硫钼酸盐/硫钨酸盐混合分散体：(2)将水泥、硅灰、金刚砂按照比例称取并搅拌，得到预混料；(3)将减水剂、硫钼酸盐/硫钨酸盐混合分散体、稳态剂、水在容器中混合，搅拌均匀得到液体混合料；(4)将液体混合料倒入预混料中搅拌均匀，加入钢纤维继续搅拌，得到高保坍超高性能混凝土料浆。本发明可以提高混凝土拌和物的坍落度和保持性，同时降低体系的粘度。
The invention discloses concrete with high slump loss resistance and ultra-high performance and a preparation method thereof, and the concrete is prepared from the following components in percentage by mass: 27-38% of cement, 8.5-9.5% of silica fume, 39-49% of carborundum, 5.5-8% of steel fiber, 2-4% of a water reducing agent and 1-5% of a viscosity reducing and slump loss resistance agent. The viscosity-reducing slump-retaining agent is a mixture of a steady-state agent and a thiomolybdate/thiotungstate mixed dispersion. The preparation method comprises the following steps: (1) preparing a thiomolybdate/thiotungstate mixed dispersion; (2) weighing and stirring the cement, the silica fume and the carborundum in proportion to obtain a premix; (3) mixing a water reducing agent, the thiomolybdate/thiotungstate mixed dispersion, a stabilizing agent and water in a container, and uniformly stirring to obtain a liquid mixture; and (4) pouring the liquid mixture into the premix, uniformly stirring, adding steel fibers, and continuously stirring to obtain the high-slump-loss-resistant ultra-high-performance concrete slurry. The slump and retentivity of a concrete mixture can be improved, and the viscosity of a system is reduced.
本发明公开了一种高保坍超高性能混凝土及其制备方法，按质量百分比计，包括以下组分：水泥27～38%，硅灰8.5～9.5%，金刚砂39～49%，钢纤维5.5～8%，减水剂2～4%，降粘保坍剂1～5%；降粘保坍剂为稳态剂与硫钼酸盐/硫钨酸盐混合分散体的混合物。制备方法包括以下步骤：(1)制备硫钼酸盐/硫钨酸盐混合分散体：(2)将水泥、硅灰、金刚砂按照比例称取并搅拌，得到预混料；(3)将减水剂、硫钼酸盐/硫钨酸盐混合分散体、稳态剂、水在容器中混合，搅拌均匀得到液体混合料；(4)将液体混合料倒入预混料中搅拌均匀，加入钢纤维继续搅拌，得到高保坍超高性能混凝土料浆。本发明可以提高混凝土拌和物的坍落度和保持性，同时降低体系的粘度。
Concrete with high slump loss resistance and ultra-high performance and preparation method thereof
一种高保坍超高性能混凝土及其制备方法
30.04.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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