Research on Surface Repair Methods and Application Technology for UHPC Shaped Components

The beauty of architecture begins with the restoration of details—UHPC surface repair technology for shaped components makes the perfect fusion of art and structure possible.

In the field of contemporary architectural decoration, UHPC (ultra-high performance concrete), with its ultra-high strength, outstanding durability, and powerful shaping capability, has become the "aesthetic centerpiece" of high-end projects such as landmark buildings and commercial complexes. However, UHPC shaped components are prone to surface defects during production, transportation, and installation due to external impact, temperature changes, and other factors, affecting the overall visual effect of the building. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group has leveraged its full-chain technical expertise to develop a systematic surface repair solution for UHPC shaped components, helping designers and owners solve the challenge of "balancing aesthetics and performance."

I. Causes of Surface Defects in UHPC Shaped Components and the Necessity of Repair

Although UHPC material offers ultra-high mechanical performance, its delicate surface texture and complex shaping features place extremely high demands on construction precision. Common defects include air bubble holes, localized damage, and uneven color differences. These problems not only weaken the decorative quality of components but may also become hidden risks to structural durability. Take a UHPC curtain wall project of a grand theater as an example: minor bumps during transportation caused a 2mm-deep notch at a corner; without timely repair, rainwater penetration could lead to internal fiber corrosion. Through 28 years of engineering practice, Qinglong Group has found that scientific repair techniques can restore more than 95% of a component's original performance, with repair marks barely visible to the naked eye—this is precisely the core value of the after-sales maintenance stage within Qinglong's "full-chain service."

II. Qinglong UHPC Surface Repair Technology: Innovative Breakthroughs from Materials to Processes

As a national high-tech enterprise, Qinglong Group has continued to make breakthroughs in repair material R&D and process optimization. Based on the characteristics of UHPC materials, the group developed a special repair mortar with a compressive strength of over 120MPa and a bond strength with the substrate exceeding 3.5MPa, ensuring that the repair layer forms an integrated load-bearing system with the original component. The repair process strictly follows the five-step standard of "defect assessment - surface treatment - material proportioning - layered repair - fine polishing." For example, for air bubble hole defects, vacuum infusion technology is used to ensure the repair material completely fills the voids; for color difference issues, visual uniformity is achieved through nano-level pigment blending and UV curing processes. This "millimeter-level repair precision" has been verified in projects such as the renovation of Century Plaza on Nanjing East Road, where the repair of light-transmitting UHPC components earned the "Silver Award of the First UHPC Construction Engineering Innovation Award."

III. Full-Chain Service Empowerment: A Quality Closed Loop from Design to Maintenance

Qinglong Group integrates surface repair technology into its "deepened design - production and manufacturing - construction and installation - after-sales maintenance" full-chain service system. In the deepened design stage, BIM technology simulates the stress state of components to optimize the structure of vulnerable parts; in production, automated casting and steam curing processes are used to reduce defects at the source; during installation, 3D laser scanning positioning is employed to avoid impact damage caused by construction errors; in the after-sales stage, a maintenance mechanism with a 2-hour response and 24-hour on-site arrival is established. This dual guarantee of "prevention + repair" has enabled Qinglong UHPC components to achieve a record of "zero major quality complaints" in projects across real estate, municipal, and overseas sectors. The long-term cooperation with renowned real estate groups such as Poly and China Overseas is built precisely on this foundation of trust.

From the curved curtain wall of the Guangzhou Opera House to the irregular relief of a landmark project in Malaysia, Qinglong Group's 28 years of technical expertise have proven that surface repair of UHPC shaped components is not merely "mending flaws," but a safeguard for the integrity of architectural art. Moving forward, Qinglong will continue its mission of "creating aesthetically beautiful architecture," and through material innovation and process upgrades, let UHPC shine with lasting charm in more high-end buildings, becoming a world-leading manufacturer of outstanding UHPC/GRC/GRG/GRP.