Hollow sandwich steel pipe concrete column and preparation method and application thereof
By using a combination of wood ash, pyrite, and polyacrylamide in hollow steel-concrete composite columns, the problem of bonding failure between steel pipes and concrete is solved, and the impact resistance is improved. This method is suitable for engineering structures such as high-rise buildings, long-span bridge piers, transmission towers, and wind power towers.
Patent Information
- Application Number
- CN202610620884.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-07
- Publication Date
- 2026-07-17
AI Technical Summary
Hollow-core steel-concrete composite columns suffer from bond failure between the steel tube and the concrete, which affects their impact resistance.
Wood ash and pyrite are used to replace part of the cement and sand, and their proportions are strictly controlled. Combined with the use of polyacrylamide, the interfacial adhesion between concrete and inner and outer steel pipes is improved. The composite wood ash and cement produce a pozzolanic effect. Pyrite, as a micro-aggregate filler, and polyacrylamide work synergistically to enhance the interfacial bonding force.
It significantly improves the interfacial bonding and impact resistance of hollow-core steel-concrete composite columns, meeting the performance requirements of large-scale engineering structures such as high-rise buildings, long-span bridge piers, transmission towers, and wind power towers.
Smart Images
Figure CN122403887A_ABST