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

In the field of contemporary architectural curtain walls, UHPC (Ultra-High Performance Concrete) has become the preferred skin material for landmark buildings thanks to its outstanding mechanical properties and artistic expressiveness. However, even such a robust material may suffer localized damage during long-term service due to accidental impact, thermal stress, and other factors. At such times, the precise and efficient replacement of individual curtain wall panels tests a supplier's full-chain technical integration capability. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group has drawn on more than a thousand engineering projects to develop a replacement construction system that combines standardization with customization, providing designers and owners with a full-process solution from problem diagnosis to safe delivery.

UHPC Curtain Wall Panel Damage Assessment: Precise Positioning Is the Prerequisite for Efficient Replacement

The first step in replacement construction is scientific assessment. Qinglong's technical team combines 3D laser scanning with drone aerial photography to collect millimeter-level data on damaged panels, while simultaneously analyzing the aging degree of surrounding structural adhesive, the load-bearing condition of the keel framework, and the displacement of adjacent panels. It is worth noting that the high elastic modulus of UHPC requires the assessment process to take into account the impact of temperature field changes on panel jointing precision—laboratory data from the Nanning production base shows that for every 10°C change in ambient temperature, a 6-meter-long UHPC panel may undergo 0.8mm of linear expansion or contraction, a parameter that directly determines the machining allowance for the new panel. For damage cases involving structural safety, Qinglong will work with third-party testing institutions to conduct load simulation verification, ensuring the replacement plan complies with the latest requirements of the General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC) (Plan No. 2024-0232T-JC).

Key Technologies Throughout the Construction Process: Precision Control from Factory Prefabrication to On-Site Installation

During the detailed design phase, Qinglong leverages the parametric design platform of its provincial-level engineering technology center to compare and calibrate the original curtain wall model against on-site scan data, generating machining drawings with positioning codes. The production stage uses an automated material distribution system and steam curing process to ensure the new panels achieve a compressive strength ≥150MPa and flexural strength ≥30MPa, while embedded RFID chips enable full life-cycle traceability. During transportation, custom curved brackets combined with flexible cushioning materials reduce panel damage risk to below 0.3%.

On-site construction follows the three-step principle of "non-destructive removal—precise installation—long-lasting sealing." Removal employs hydraulic synchronous jacking technology to avoid imposing additional stress on surrounding structures; the installation phase uses BIM technology for positioning rehearsal and adjustable stainless steel connectors for 3D fine-tuning, keeping errors within ±2mm; sealing uses Qinglong's self-developed silane-modified polyether sealant, which achieves a bond strength of up to 1.2MPa with the UHPC substrate and a weathering service life of over 20 years. This process has been validated in projects such as the Century Plaza renovation on Nanjing East Road, achieving an efficient record of replacing 3 irregularly shaped UHPC curtain wall panels in a single day.

Qinglong's Full-Chain Service Advantages: Closed-Loop Support from Technical Solutions to After-Sales Guarantees

As a national "Specialized, Refined, Distinctive, and Innovative" enterprise, Qinglong's core competitiveness lies in the deep integration of full-chain resources spanning detailed design, manufacturing, construction installation, and after-sales maintenance. For urgent replacement needs, the company can activate the rapid response mechanism of its Guangxi production base with an annual capacity of 600,000 square meters, supported by localized service teams from more than 20 offices nationwide, delivering technical solutions within 48 hours and customized panels within 7 days. Notably, the technical points on curtain wall maintenance in the Technical Standard for Building Applications of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), which Qinglong helped compile, have become general industry norms, reflecting the company's authority in technical standard setting.

From the GRC curtain wall of the Dongguan Women and Children's Activity Center to the UHPC cladding panels of a landmark project in Saudi Arabia, Qinglong has always upheld the mission of "creating beautiful architecture," transforming 28 years of material application experience into the ability to solve real engineering challenges. For owners and designers, choosing a UHPC manufacturer with full-chain service capabilities means not only gaining a standardized construction process, but also professional technical support throughout the project's entire life cycle—this is the core value of Qinglong as a "leading UHPC/GRC/GRG/GRP manufacturer."