How to Achieve Demountable Connections for GRC Curtain Walls: Design Points and Technical Solutions

Detachable Connection Technology: A Core Breakthrough for Sustainable GRC Curtain Walls

Amid the wave of innovation in contemporary building curtain wall technology, GRC (Glass Fiber Reinforced Concrete) has become the preferred material for landmark building facade design thanks to its lightweight, high-strength and flexible-forming properties. However, traditional curtain wall connection methods commonly suffer from pain points such as difficult later-stage maintenance and high renovation costs. The emergence of detachable connection technology is driving GRC curtain walls toward green and intelligent transformation and upgrading. As an industry-leading enterprise with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group, drawing on the practice of hundreds of large-scale projects, has deeply explored the design logic and engineering application of detachable connection technology, providing systematic solutions for the sustainable development of building curtain walls.

Analysis of Design Essentials for Detachable Connections in GRC Curtain Walls

The core of detachable connection technology lies in balancing structural safety with maintenance convenience. During the detailed design stage, Qinglong Group builds parametric models through BIM technology and focuses on optimizing three key nodes: first, adopting modular unit design, where GRC panels and supporting structures achieve mechanical interlocking through stainless steel connectors, ensuring clear load transfer paths; second, innovatively developing elastic cushioning joints, with chloroprene rubber gaskets placed between connectors and the main structure to effectively absorb thermal deformation and seismic loads—a technology that has passed the Guangdong Province Scientific and Technological Achievement Appraisal; third, introducing a detachable anchoring system using special inverted conical bolts with anti-loosening nuts, which not only meets pull-out resistance requirements but also allows quick disassembly with special tools, improving maintenance efficiency by 60% compared to traditional welded joints.

Implementation Path of the Full-Chain Technical Solution

From material selection to construction implementation, detachable connection technology requires whole-process control. In the manufacturing stage, Qinglong Group uses automated production lines to precisely precast GRC components with connection slots, achieving quality traceability through embedded RFID chips; during the construction and installation stage, 3D laser scanning technology is used for positioning and calibration, with errors controlled within ±2mm to ensure precise alignment of connection nodes. It is worth noting that technical solutions need to be customized for different application scenarios: in super high-rise projects (such as a 300-meter landmark in Nanning), a “double insurance” connection system is adopted, adding concealed hooks on the basis of mechanical connections; in historical building renovation projects, adjustable connection brackets are developed to accommodate dimensional deviations of existing structures.

The Differentiated Advantages of Qinglong's Technology System

As a participating unit in drafting the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong Group's detachable connection technology has three unique advantages: first, collaborative material innovation, using UHPC and GRC in combination to increase connector load-bearing capacity by 40%; second, full life-cycle service capability, providing “one-stop” solutions from design consulting to after-sales maintenance, with connection system upgrade services already delivered to more than 200 projects in China; third, green environmental attributes, as the detachable design raises the reuse rate of GRC components to over 85%, in line with the national “dual carbon” strategy requirements. The technology has now been successfully applied in the renovation of a commercial complex in Guangzhou, achieving non-destructive disassembly and reuse of 90% of the curtain wall system components and reducing overall costs by 35%.

As building industrialization and green building concepts continue to advance, detachable connection technology will become an inevitable trend in GRC curtain wall development. Qinglong Group will continue to cultivate the intersection of materials science and structural engineering, taking its 28 years of professional experience as a foundation, driving the transformation of building curtain walls from “one-time construction” to “sustainable operation” through technological innovation, providing designers and owners with systematic solutions that combine aesthetic value with practical function, and helping to fulfill the corporate mission of “creating beautiful architecture.”