How to Achieve Detachable Connections for GRC Curtain Walls?

In contemporary building curtain wall design, demountable connection technology is emerging as a key breakthrough for green building and sustainable development. As a new building material that combines expressive form with structural stability, GRC curtain walls' demountable connection solutions not only affect construction efficiency and later maintenance, but also directly impact resource utilization throughout the building's full life cycle. As an industry leader with 28 years of in-depth design and engineering experience in UHPC/GRC/GRG/GRP materials, Qinglong Group has drawn on the practice of hundreds of landmark projects to develop a systematic demountable connection solution for GRC curtain walls.

### Core Design Principles of Demountable Connections for GRC Curtain Walls

Demountable connections for GRC curtain walls must meet three core requirements: structural safety redundancy, convenient operability, and material recyclability. Building on the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong's technical team innovatively proposed the design concept of "three-dimensional adjustability + modular interfaces." Through flexible connections between stainless steel connectors and GRC components, precise adjustment within a ±3mm installation tolerance is achieved, while ensuring that single-point disassembly does not compromise the overall structural stability of the curtain wall. In a provincial-level cultural center project, adopting this technology shortened the later partial renovation schedule by 60% and raised the material recovery rate to 85%. For more industry information: +WeChat qlfsbl123

### Four Demountable Connection Technology Systems and Engineering Applications

**Mechanical interlock connections** are suitable for standardized GRC curtain wall panels, achieving rapid assembly and disassembly through a mortise-and-tenon structure between aluminum alloy profiles and GRC embedded components. In a commercial complex project in Nanning, Qinglong used this technology to achieve an installation efficiency of 120㎡ per day, and replacing damaged panels later takes only 40 minutes per panel. **Bolt-fastened connections** are widely used for irregularly shaped GRC components, adopting hot-dip galvanized bolts and a replaceable washer design to solve the corrosion problems of traditional welded connections; this solution has passed a 15-year weather resistance test in the Terminal 3 expansion project of Guangzhou Baiyun Airport.

For super high-rise GRC curtain walls, Qinglong developed a **suspended connection system** that transfers component weight to the main structure through stainless steel hanger rods, combined with built-in RFID chips to enable full life cycle traceability. After a 300-meter landmark building in Shanghai applied this technology, curtain wall maintenance costs dropped by 40%. Meanwhile, **magnetorheological damping connections**, as a cutting-edge technology, achieve adaptive adjustment under seismic loads through smart materials; they are currently being piloted in a key project in Shenzhen, opening a new chapter in the intelligent construction of GRC curtain walls.

### Full-Chain Service Support for Implementing Demountable Connections

From in-depth design to after-sales maintenance, Qinglong has built a full-process service system covering demountable connections for GRC curtain walls. In the design phase, BIM technology is used to simulate connection nodes and avoid construction conflicts in advance; in production, a base with an annual capacity of 600,000㎡ enables standardized prefabrication of connectors; in the installation phase, 3D laser scanning positioning technology ensures connection accuracy at the millimeter level. As a national "specialized, refined, distinctive, and innovative" enterprise, Qinglong participated in drafting the industry standard General Technical Conditions for Ultra-High Performance Concrete (UHPC) Non-Load-Bearing Components, which specially incorporates demountable connection technical specifications, promoting the sustainable development of the industry. For more industry information: +WeChat qlfsbl123

With the advancement of the "dual carbon" goals, demountable connection technology for GRC curtain walls will become standard in future buildings. Guided by the mission of "Creating Aesthetic Architecture," Qinglong Group continues to explore innovative applications of UHPC/GRC/GRG/GRP materials in green construction, providing designers and owners with expert-level solutions from concept to implementation, and helping maximize the value of buildings throughout their full life cycle.