White UHPC hollowed-out decorative hanging plate and production process thereof

Abstract

The invention discloses a white UHPC hollowed-out decorative hanging plate and a production process thereof. The production process comprises the following steps that white cement, mineral powder, silica fume, an expanding agent, quartz sand and quartz powder are added into a stirrer, stirring is performed for 5-8 min, a shrinkage reducing agent, a high-performance polycarboxylic acid shrinkage reducing agent and water are added at the same time, and stirring is further conducted for 8-15 min; then, steel fibers are added, stirring is further conducted for 8-12 min to obtain UHPC, hollowed-out pattern design is conducted at first before production, and then the position of a round wood mold is marked on a steel mold table through a pencil according to the designed pattern; and after marking is completed, a release agent is brushed on the steel mold table back and forth. By adopting the production process designed by the invention, the white UHPC hollowed-out decorative hanging plate can be simply and quickly prepared, and time and labor are saved; and when the white UHPC hollowed-out decorative hanging plate is applied to a building curtain wall, the white UHPC hollowed-out decorative hanging plate also has ultrahigh mechanical properties and ultrahigh durability while ensuring a good decorative effect, and the service life of a building exterior wall can be prolonged.

Description

technical field [0001] The invention relates to the technical field of decorative boards, in particular to a white UHPC hollowed-out decorative hanging board and a production process thereof. Background technique [0002] UHPC (Ultra High Performance Concrete) is a cement-based composite material with ultra-high mechanical properties, durability and good decorative properties. Using UHPC in the production of external hollowed-out panels can improve the quality of the building and achieve the same lifespan as the building. To achieve ultra-high mechanical properties and ultra-high durability, in addition to using active mineral admixtures such as silica fume and mineral powder and ultra-low water-cement ratio, UHPC usually uses quartz sand and quartz powder with a particle size of less than 2.0mm. Traditional coarse aggregates are used to eliminate the interface defects between aggregates and rubber materials. At the same time, appropriate amounts of steel fibers, expansion a...

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Problems solved by technology

[0002] UHPC (Ultra High Performance Concrete) is a cement-based composite material with ultra-high mechanical properties, durability and good decorative properties. Using UHPC in the production of external hollowed-out panels can improve the quality of the building and achieve the same lifespan as the building. To achieve ultra-high mechanical properties and ultra-high durability, in addition to using active mineral admixtures such as silica fume and mineral powder and ultra-low water-cement ratio, UHPC usually uses quartz sand and quartz powder with a particle size of less than 2.0mm. Traditional coarse aggregates are used to eliminate the interface defects between aggregates and rubber materials. At the same time, appropriate amounts of steel fibers, expansion agents, and shrinkage reducers are added to improve the crack resistance of components. In view of the lack of relevant specifications, UHPC is currently mainly used in building structure reinforcement projects , very few buildings in China use UHPC as decorative exterior wall hanging panels, and there are very few UHPC curtain wall manufacturers. Therefore, how to combine UHPC with building curtain walls to achieve the excellent decorative effect of UHPC has not yet proposed a mature solution. Therefore, this The invention proposes a white UHPC hollow decorative hanging board and its production process

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