A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Modified steel fiber and preparation method and application thereof
The invention belongs to the technical field of concrete, and particularly relates to a modified steel fiber and a preparation method and application thereof. The invention provides a modified steel fiber. The modified steel fiber comprises a steel fiber body and a modified film wrapping the surface of the steel fiber body. The modified film is a film obtained by polycondensation of steel fiber surface salt and orthosilicic acid, and the steel fiber surface salt is obtained by reaction of orthosilicic acid and hydroxide of steel fiber. According to the ultra-high performance concrete, the surface roughness of the modified fibers is increased through a modified film in the modified steel fibers, meanwhile, more tangential loads are introduced, the binding force between the modified fibers and a cement matrix interface is improved, and when the ultra-high performance concrete is subjected to external force, the modified fibers are prevented from being directly pulled out of a fracture surface; therefore, the tensile property of the modified fiber can be fully exerted, and the tensile property of the ultra-high performance concrete is further improved.
本发明属于混凝土技术领域，具体涉及一种改性钢纤维及其制备方法和应用。本发明提供了一种改性钢纤维，包括钢纤维和包覆于所述钢纤维表面的改性薄膜；所述改性薄膜为钢纤维表面盐与原硅酸缩聚得到的薄膜，所述钢纤维表面盐由原硅酸和钢纤维的氢氧化物反应得到。在本发明中，改性钢纤维中的改性薄膜增加了改性纤维表面粗糙度，同时引入了更多的切向载荷提高了改性纤维与水泥基体界面的结合力，当超高性能混凝土收到外力时避免使改性纤维直接从断裂面拔出，从而能够充分发挥改性纤维的抗拉性能，进而提高超高性能混凝土的抗拉性能。
Modified steel fiber and preparation method and application thereof
The invention belongs to the technical field of concrete, and particularly relates to a modified steel fiber and a preparation method and application thereof. The invention provides a modified steel fiber. The modified steel fiber comprises a steel fiber body and a modified film wrapping the surface of the steel fiber body. The modified film is a film obtained by polycondensation of steel fiber surface salt and orthosilicic acid, and the steel fiber surface salt is obtained by reaction of orthosilicic acid and hydroxide of steel fiber. According to the ultra-high performance concrete, the surface roughness of the modified fibers is increased through a modified film in the modified steel fibers, meanwhile, more tangential loads are introduced, the binding force between the modified fibers and a cement matrix interface is improved, and when the ultra-high performance concrete is subjected to external force, the modified fibers are prevented from being directly pulled out of a fracture surface; therefore, the tensile property of the modified fiber can be fully exerted, and the tensile property of the ultra-high performance concrete is further improved.
本发明属于混凝土技术领域，具体涉及一种改性钢纤维及其制备方法和应用。本发明提供了一种改性钢纤维，包括钢纤维和包覆于所述钢纤维表面的改性薄膜；所述改性薄膜为钢纤维表面盐与原硅酸缩聚得到的薄膜，所述钢纤维表面盐由原硅酸和钢纤维的氢氧化物反应得到。在本发明中，改性钢纤维中的改性薄膜增加了改性纤维表面粗糙度，同时引入了更多的切向载荷提高了改性纤维与水泥基体界面的结合力，当超高性能混凝土收到外力时避免使改性纤维直接从断裂面拔出，从而能够充分发挥改性纤维的抗拉性能，进而提高超高性能混凝土的抗拉性能。
Modified steel fiber and preparation method and application thereof
一种改性钢纤维及其制备方法和应用
TANG WEIBIN (author) / LI XIAOMIN (author) / WEI DINGBANG (author) / GUO HAIZHEN (author) / REN GUOBIN (author) / WEN DECHENG (author) / HU LIEN (author) / SU KAI (author)
2023-09-01
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Organosilicon composite coating, modified steel fiber and preparation method and application thereof
| European Patent Office | 2024
Modified plastic copper-plated steel fiber as well as preparation method and application thereof
| European Patent Office | 2024
Nano-modified ultrahigh-strength steel fiber concrete and preparation method thereof
| European Patent Office | 2021
Surface modified steel fiber toughened bauxite castable and preparation method thereof
| European Patent Office | 2024
Modified fiber as well as preparation method and application thereof
| European Patent Office | 2024