Construction Process and Key Technical Points for Replacing a Single Damaged UHPC Curtain Wall Panel

As the "outer garment" of modern architecture, building curtain walls directly affect the overall quality of a building through their safety and aesthetics. When a UHPC curtain wall panel is damaged, a scientific and standardized replacement process is not only key to ensuring building safety, but also a comprehensive test of material performance and construction techniques. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group, drawing on its full-chain service experience, explains the core process and technical key points for replacing a single damaged UHPC curtain wall panel, providing professional solutions for building curtain wall maintenance.

I. Preliminary Survey and Plan Formulation: The Scientific Starting Point for UHPC Curtain Wall Panel Replacement

Before starting the replacement work, the damaged area must be accurately surveyed using 3D laser scanning technology to determine the dimensional parameters, installation nodes, and stress conditions of the surrounding structure of the UHPC curtain wall panel. Relying on its Grade II professional contracting qualification for building curtain wall engineering, the Qinglong team uses BIM technology to simulate the removal path of the damaged panel and temporary support schemes, while referencing the T/CBMF171-2022 standard "Ultra-High Performance Concrete (UHPC) Exterior Wall Panels" to ensure the plan complies with material characteristics and building safety codes. It is worth noting that UHPC material has ultra-high compressive strength and toughness, and its brittle characteristics require special attention to the internal stress distribution of the panel during the survey stage to avoid secondary damage.

II. Safety Protection and Old Panel Removal: The Core Guarantee for UHPC Curtain Wall Construction

Establishing the safety protection system is the top priority of construction. Qinglong adopts "double insurance" protective measures: a fully enclosed safety net is set up on the periphery, while customized hoisting equipment combined with vacuum suction cups is used inside to ensure the smooth transfer of UHPC panels during removal. Removal strictly follows the principle of "anchors first, then structure," using specialized tools to release the connecting bolts and sealing strips in sequence, while simultaneously recording the parameters of each node to provide a data baseline for new panel installation. Special attention must be paid to the weight control of UHPC panels at this stage—compared with traditional stone curtain wall panels, UHPC is approximately 60% lighter, but hoisting stress calculations are still required to ensure construction safety.

III. New Panel Customization and Installation Commissioning: Precise Presentation of UHPC Material Performance

The production of new UHPC curtain wall panels strictly follows Qinglong's detailed design standards, using automated material distribution systems and steam curing processes to ensure material compressive strength ≥150MPa and elastic modulus ≥40GPa. Before installation, dimensional accuracy is verified through factory pre-assembly, and on-site 3D positioning technology achieves millimeter-level installation error control. Joint treatment uses a composite process of silicone structural sealant and UHPC-specific repair materials, ensuring both water tightness and air tightness while maintaining the overall visual continuity of the curtain wall. As a national high-tech enterprise, Qinglong incorporates patented technologies (such as ZL2023XXXXXXXXX) at this stage, improving installation efficiency by more than 30%.

IV. Quality Acceptance and Post-Installation Maintenance: The Extension of Full-Chain Service Responsibility

After the replacement is completed, comprehensive testing must be carried out in accordance with the JGJ/T423-2018 "Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC)," including load-bearing capacity tests, wind pressure resistance performance tests, and appearance quality inspections. Qinglong's after-sales maintenance services cover regular inspections (once per quarter in the first year), structural sealant aging monitoring, and UHPC surface protection treatment, fully embodying the service principle of "meticulousness and excellence." To date, Qinglong has provided curtain wall maintenance solutions for more than a thousand projects across the country, with its overseas market extending to Malaysia, Australia, and other regions, verifying the durability advantages of UHPC materials under different climatic conditions.

The replacement of a single UHPC curtain wall panel may appear to be a localized project, but it is in fact a comprehensive test of material characteristics, construction techniques, and project management. Supported by 28 years of full-chain experience, Qinglong Group seamlessly connects detailed design, manufacturing, and construction installation, not only ensuring a safe and efficient replacement process, but also safeguarding the long-term stable operation of building curtain walls through technological innovation and quality control. In the future, Qinglong will continue to uphold its mission of "creating aesthetically beautiful architecture," promoting the innovative application of UHPC/GRC/GRG/GRP materials in the field of architectural decoration, and becoming a leader in the industry's niche segments.