How to Achieve Demountable Connections for GRC Curtain Walls: Design Essentials and Construction Technique Analysis

Demountable Connection Technology: The Core Breakthrough for Sustainable GRC Curtain Walls

In the development of contemporary building curtain wall technology, GRC (Glass Fiber Reinforced Concrete) has become the preferred material for landmark building skin design thanks to its lightweight, high-strength and flexible-forming properties. However, traditional curtain wall connection methods commonly suffer from difficult later-stage maintenance and high renovation costs, and how to achieve demountable connections for GRC curtain walls is becoming a key issue in the industry's technological upgrading. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group has developed a systematic demountable connection solution based on the practice of hundreds of large-scale projects, providing technical support for the whole-life-cycle management of building curtain walls.

Design Logic and Key Points of Demountable Connections for GRC Curtain Walls

Demountable connection design must be based on the dual considerations of material properties and engineering requirements. The elastic modulus and strength characteristics of GRC material dictate that connection nodes must have three-dimensional adjustment capability. During the detailed design stage, Qinglong's technical team applied BIM parametric modeling to break down each connection node into three parts—load-bearing components, adjustment components and fixing components—achieving an installation accuracy control standard of ±2mm. Key technical points include: adopting a combined system of stainless steel embedded parts and aluminum alloy adjustment brackets, with a slotted-hole design achieving ±50mm horizontal adjustment; developing special elastic gaskets to solve the rigid contact problem between GRC panels and metal brackets, reducing the risk of cracking caused by thermal stress; and innovatively designing mechanically locked connections to replace traditional welding processes, reducing the disassembly time of a single panel from 4 hours under traditional methods to 30 minutes.

Construction Technology Innovation: Full-Process Control from Factory Prefabrication to On-Site Assembly

The realization of demountable connections depends on the coordination of industrialized production and refined construction. Qinglong established a digital production line at its manufacturing base in Nanning, Guangxi, using CNC machining to ensure that the precision of connection components is controlled at the 0.1mm level. During on-site installation, 3D laser scanning technology is used for benchmark positioning, combined with custom tooling fixtures to achieve "building-block" style assembly. For a commercial complex project in Guangzhou, Qinglong innovatively applied the "reverse installation method": the connection framework was first leveled as a whole, and then GRC panels were installed one by one, improving construction efficiency by 40% while reducing the risks of high-altitude work. It is worth noting that demountable design is not simply a matter of mechanical connection—it requires systematic consideration of waterproofing construction, thermal bridge interruption and other aspects. The double-sealing rubber strips and integrated insulation nodes developed by Qinglong have successfully solved the waterproofing and insulation challenges of demountable nodes.

Value Reconstruction of GRC Curtain Walls from a Whole-Life-Cycle Perspective

Demountable connection technology endows GRC curtain walls with attributes of sustainable development. From the owner's perspective, demountable design reduces curtain wall maintenance costs by more than 60%. A cultural center project in Shanghai used Qinglong's demountable solution to successfully complete a facade renovation after 5 years of operation, saving more than 10 million yuan compared with traditional demolition and reconstruction. For designers, demountable connections expand the application boundaries of GRC materials. A landmark building in Shenzhen adopted Qinglong's demountable GRC curtain wall system, achieving modular replacement of the curved skin and fulfilling the design vision of the building's expression changing with the seasons. As a contributing unit of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC), Qinglong is promoting the inclusion of demountable connection technology in industry standards, leading the shift of GRC curtain walls from "one-time construction" to a "full-cycle service" model.

As the concepts of green building and the circular economy deepen, demountable connection technology for GRC curtain walls will become standard in future building skin systems. Leveraging its full-chain advantages in the field of UHPC/GRC/GRG/GRP materials, Qinglong Group will continue to explore material performance optimization and connection technology innovation, providing designers with more imaginative solutions and creating more lasting architectural value for owners. Driven by the mission of "Creating Beautiful Architecture", Qinglong is redefining the sustainable development path of building curtain walls through technological innovation.