How to Achieve Detachable Connections in GRC Curtain Walls — Design Points, Technical Paths and Engineering Application Analysis

In contemporary building curtain wall design, detachable connection technology is becoming a key breakthrough for achieving green construction and sustainable operation and maintenance. GRC curtain walls are widely used in all kinds of landmark buildings thanks to their lightweight, high-strength and flexible-forming properties, while the design of detachable connection systems directly affects the curtain wall's installation efficiency, maintenance cost and recycling value. As an industry-leading enterprise with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group, based on the practice of hundreds of large-scale projects, provides an in-depth analysis of the design logic and technical pathways of detachable connections for GRC curtain walls, offering the industry solutions that combine practicality with forward vision.

The core design point of detachable connections for GRC curtain walls lies in balancing structural safety with ease of operation and maintenance. While traditional rigid connections can meet mechanical requirements, they struggle to cope with thermal deformation and later replacement needs. Through BIM parametric design, Qinglong's technical team divides connection nodes into load-bearing units and detachable units: the load-bearing unit uses a hot-dip galvanized steel framework with pre-embedded connectors in GRC panels to form a rigid fixation, ensuring wind-pressure resistance; the detachable unit achieves flexible connection through stainless steel bolts and slot-type interfaces, allowing ±5mm displacement compensation. This "combination of rigidity and flexibility" design approach successfully solved the thermal expansion and contraction problems of a long-span GRC curtain wall in a commercial complex project in Shenzhen, while reducing the replacement time of a single panel to within 2 hours.

Innovation in technical pathways is the key support for realizing detachable connections. Qinglong's R&D center has developed three major technical systems for different application scenarios: first, a prefabricated assembly connection system, in which connectors and GRC panels are produced to factory standards and installed on site in a "building blocks" fashion, with precision error controlled within ±2mm and efficiency improved by 40% compared with traditional wet operations; second, a modular quick-release structure, which in a cultural center project in Guangzhou adopts a concealed lock design, combined with special disassembly tools, to achieve damage-free disassembly of curved GRC curtain walls; third, intelligent monitoring connection nodes, embedded with RFID chips and strain sensors to collect force data in real time, providing a basis for preventive maintenance. These technologies have not only passed the rigorous testing of the Technical Standard for Building Application of Glass Fibre Reinforced Cement (GRC) (JGJ/T423-2018), but have also obtained multiple national invention patents.

Attention to detail in engineering practice directly determines the actual performance of detachable connections. In a municipal project in Nanning, Qinglong innovatively adopted "three-dimensionally adjustable transfer connectors" for the connection nodes between the GRC curtain wall and UHPC sunshades, solving on-site installation tolerance problems through fine-adjustment mechanisms in the X/Y/Z directions. In overseas projects such as a hotel project in Malaysia, considering the high temperature and humidity of the tropical climate, the entire connection system was made of 316 stainless steel and treated with a fluorocarbon coating to ensure durability of more than 20 years. It is worth noting that detachable design is not simply physical separation, but requires full-process coordination from material selection and structural calculation to construction techniques. Relying on production bases covering the whole country and overseas offices, Qinglong can provide customers with integrated services from detailed design to after-sales maintenance. For more industry information: Add WeChat qlfsbl123

With the advancement of the "dual carbon" goals, whole life cycle management of building curtain walls has become a new industry trend. The detachable connection technology for GRC curtain walls not only reduces later maintenance costs, but also realizes material recycling, aligning with Qinglong's mission of "Creating Beautiful Architecture". In the future, Qinglong will continue to deepen collaborative innovation with design institutes and real estate developers, exploring cutting-edge technologies such as UHPC-GRC composite connections and intelligently driven detachable systems, promoting the development of architectural decorative materials toward green and intelligent directions. As a national "specialized, refined, distinctive and innovative" enterprise and a participant in industry standard formulation, Qinglong always maintains a "meticulous and excellence-pursuing" attitude, providing more valuable solutions for building projects around the world.