Process for producing filled prestress steel strand of epoxy coating

Abstract

The invention provides a process for producing filled prestress steel strand of an epoxy coating, comprising the following steps: pretreatment process; dip coating process by a chemical precipitation method; pre-drying process; spraying process by an electrostatic method; post-drying and curing process; and after-treatment process. The invention has the effects: a layer of epoxy coating is filledand coated inside and outside the common prestress steel strand by adopting the production process so that the steel strand becomes the epoxy-coating filled prestress steel strand. The process coating method does not adopt processes of expanding the steel strand by a device to spray steel wires, then repeatedly twisting again and closing into the steel strand, therefore, the epoxy-coating filled prestress steel strand constructed and produced by the process not only keeps the mechanical property of the original prestress steel strand, but also has due chemical resistance property of the epoxycoating steel strand, and strict, scientific and environment-friendly production process.

Description

Technical field [0001] The invention relates to a technology for processing steel strands for prestressed concrete, in particular to a process for producing epoxy coating filled prestressed steel strands. Background technique [0002] At present, there are two production processes for prestressed steel strands with epoxy coating anti-corrosion properties: 1. Production of filled epoxy coated steel strands; 2. Production of painted epoxy coated steel strands Craft. The production of filled epoxy-coated steel strands is to use equipment to disassemble the well-twisted steel strands, spray epoxy powder on each steel wire with electrostatic spraying to form a coating, and then use equipment to re-twist into Epoxy coated steel stranded wire. The disadvantage of the coated steel strand produced by this process is that the original state of the prestressed steel strand is destroyed, and the mechanical properties are reduced due to its low relaxation performance. The process of produc...

AI Technical Summary

Problems solved by technology

The disadvantages of the coated steel strand produced by this process are: the original state of the prestressed steel strand is destroyed, and the mechanical properties are reduced, especially the low relaxation performance.

The process of producing coated epoxy-coated steel strands is to spray the outer layer of the steel strands with electrostatic spraying without dismantling the steel strands. The disadvantage is that there is no epoxy coating protection inside the steel strands.

Images