How to maintain and recycle adjustable screw jacks for repeated use?

Adjustable screw jacks are typical reusable temporary construction hardware with long service life and high turnover value.Scientific post-project maintenance and standardized recycling management can greatly reduce enterprise material procurement costs and improve resource utilization efficiency.After the completion of scaffolding and formwork dismantling,screw jacks are mixed with concrete mortar,dust and rust stains.The first step of recycling is thorough cleaning:use steel brushes and high-pressure water to remove concrete residues and dirt on the rod body,threads,base plate and U-head.Residual mortar will block thread gaps,cause jamming of rotating nuts,and affect height adjustment and locking effect in subsequent use.For jacks with slight surface rust,manual rust removal and anti-rust grease coating are required to isolate air and moisture and prevent secondary oxidation and corrosion.Damaged components need strict screening:jacks with bent rod bodies,deformed base plates,slipped threads and cracked U-heads shall be directly scrapped and prohibited from reuse.Qualified recycled jacks shall be classified and stored by specification and type,with base jacks and U-head jacks stored separately,and different stroke and diameter products sorted uniformly.The storage warehouse shall be dry and ventilated to avoid long-term open-air rain soaking and sun exposure causing accelerated aging and corrosion.Before the next construction use,secondary inspection and debugging shall be carried out to confirm flexible thread rotation,intact structure and stable locking performance.In international engineering rental and export business,recycled screw jacks with complete maintenance records and intact performance have high market recognition.Establishing a perfect turnover maintenance system can make adjustable screw jacks achieve dozens of cyclic uses,forming a low-cost and high-efficiency construction material circulation mode.

References

GB/T 7714‑2015：

JIANG Y.Recycling maintenance and refined management of scaffolding screw jack components[J].Engineering Material Management,2023,31(06):52-56.

MLA 9th：

Jiang,Yu."Recycling Maintenance and Refined Management of Scaffolding Screw Jack Components."Engineering Material Management,vol.31,no.6,2023,pp.52-56.

APA 7th：

Jiang,Y.(2023).Recycling maintenance and refined management of scaffolding screw jack components.Engineering Material Management,31(6),52-56.