Curtain Wall Maintenance & Renovation of the Elevator, Building 1, The First Affiliated Hospital of Zhengzhou University
The First Affiliated Hospital of Zhengzhou University (Heyei Campus) | Glass curtain wall sealant application · Leakage repair · Sealant system overall replacement
This project is located at Building 1 of the Heyei Campus of The First Affiliated Hospital of Zhengzhou University, whose elevator shafts are enclosed by a glass curtain wall. Because the original sealant had been exposed to the outdoor environment for a long time, it severely aged, cracked, hardened and detached, causing seepage at many window edges and frame nodes. This maintenance systematically replaced and treated the entire elevator curtain-wall sealing system: thoroughly removing aged, failed sealant, re-applying high-performance weather-resistant sealant at glass-aluminum joints, simultaneously investigating and repairing leakage nodes, and applying anti-corrosion treatment to rusted metal parts. Work was done by high-altitude rope and suspended platform, completing all operations without disturbing the hospital's normal diagnosis and treatment order.
Safety Measures
- Dual-rope safety system: each worker has a main + secondary rope dual-suspension system, independently anchored to the roof structure.
- Roof anchor acceptance: roof anchor points put into use only after pull-out test passes; re-inspect anchor status every morning.
- Personal protective equipment: all wear dual-hook harnesses, retractable fall arresters, anti-slip gloves, helmets and reflective vests.
- Hospital no-closure coordination: coordinate with hospital security and logistics, set ground warning isolation, avoid peak outpatient hours.
- Weather monitoring: monitor wind speed and rain forecast; stop high-altitude work immediately if wind ≥ level 5 or in thunderstorm.
- Emergency response plan: first-aid kits and communication equipment on site, clear emergency contact and nearest medical route.
Construction Flow
- Site survey & inspection — inspect sealant aging level by level, mark leakage points.
- Safety facility setup — install roof anchors, lay main/secondary ropes, debug platforms.
- Old sealant removal — thoroughly scrape aged sealant with special knives + chemical remover.
- Substrate treatment — clean and dry glass & aluminum surfaces, apply primer to enhance adhesion.
- New sealant application — neutral silicone weather-resistant sealant applied evenly per spec.
- Smoothing & finishing — smooth joints with spatula while wet, keep lines neat.
- Metal anti-corrosion — derust and repaint or replace rusted aluminum clamps, bolts.
- Water-spray acceptance — water-spray test on key areas, confirm no leakage, hand over.
Main Materials & Process Parameters
| Material / Process | Spec / Model | Application |
|---|---|---|
| Neutral silicone weather-resistant sealant | Class 25, high-movement, neutral cure | Full-section sealing of glass-aluminum joints |
| Primer | Silane-coupling primer | Pre-treatment of aluminum & glass bonding interface |
| Anti-rust paint | Epoxy zinc-rich primer + polyurethane topcoat | Anti-corrosion of rusted aluminum clamps, bolts |
| High-strength nylon rope | Φ16 mm, breaking load ≥ 3000 kg | Main/secondary suspension rope system |
| Work seat / platform | Professional exterior-wall seat with anti-overturn device | Worker high-altitude operation platform |
| Masking tape | Low-tack, easy-release | Shielding protection on both sides of joints |
| Scraper / seam tool | Stainless blade + seam hook | Old sealant removal and joint cleaning |
On-site Gallery
Project Highlights
- Class 25 high-movement sealant, extended service life
- Dual-rope safety system; zero accidents
- 30-day schedule met, no closure
- Simultaneous anti-corrosion, no secondary leakage
- Water-spray acceptance passed first time
- Watermark camera recorded throughout
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