Surface Repair Methods and Application Technology Research for UHPC Shaped Components

The beauty of architecture begins with detail restoration and culminates in lasting quality. In the application of UHPC shaped components, surface repair technology is not only an extension of material performance, but also a safeguard of the artistic vitality of buildings.

As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong has always integrated its mission of “creating aesthetically beautiful buildings” into technology R&D and engineering practice. With the widespread application of UHPC (Ultra-High Performance Concrete) in high-end settings such as grand theaters, commercial complexes, and landmark buildings, the surface integrity of its shaped components directly affects a building’s artistic expressiveness and durability. This article analyzes the core methods and practical value of surface repair for UHPC shaped components from three dimensions: repair technology principles, application scenario optimization, and full-chain service assurance.

I. Causes of Surface Damage to UHPC Shaped Components and the Repair Technology System

With ultra-high strength, excellent durability, and shaping freedom, UHPC has become an ideal choice for building skins. However, during complex shaping processes and on-site installation, surface defects can easily occur due to external impact, temperature and humidity changes, and other factors. Based on 28 years of detailed design and production experience, Qinglong has established a three-tier technical system of “prevention–diagnosis–repair”: for common problems such as air bubbles, cracks, and color differences, special repair mortar (compressive strength ≥120MPa) is used for filling and leveling, combined with nano-scale interface treatment technology to ensure bonding between the repair layer and the substrate; for complex curved components, damaged areas are located through 3D scanning, and 3D-printed prefabricated repair modules are used to achieve precise matching, with repair accuracy reaching ±0.5mm.

II. Scenario-Based Repair Solutions: Customized Practice from Landmark Buildings to Landscape Gardens

Different application scenarios impose differentiated requirements on the surface repair of UHPC components. In the translucent concrete project of the Nanjing East Road Century Plaza renovation (Silver Award of the First UHPC Construction Engineering Innovation Award, AALBORG WHITE Cup), the Qinglong team innovatively adopted a layered gradient repair process to address surface light spots caused by uneven distribution of translucent aggregates, preserving UHPC’s light-transmitting performance while ensuring visual consistency. In high-frequency contact scenarios such as landscape benches and sculptures, adding UV-resistant additives and anti-slip texture design to the repair layer increased surface wear resistance by 40% and extended service life to more than 20 years.

III. Full-Chain Service Assurance: Qinglong’s Advantages from Design to Maintenance

As a national high-tech enterprise integrating detailed design, manufacturing, construction and installation, and after-sales maintenance, Qinglong incorporates surface repair technology into full life-cycle management. In the design phase, BIM technology simulates component stress and deformation to avoid potential damage risks in advance; in the production stage, automated pouring and steam curing processes reduce the incidence of surface defects at the source; during construction, a professional repair team is deployed to enable “immediate repair upon damage”; in the after-sales phase, digital maintenance records are established, providing regular inspection services for up to 5 years. This “prevention-oriented, rapid-response” service model has been validated in 600,000 square meters of UHPC/GRC/GRG/GRP projects nationwide, including strategic cooperation projects with renowned real estate groups such as Poly and China Overseas.

From technological innovation to engineering practice, the surface repair of UHPC shaped components is not only an extension of material performance, but also a reflection of Qinglong’s principle of “meticulousness and the pursuit of excellence.” Going forward, Qinglong will continue to leverage its R&D strength as a national “Specialized, Refined, Distinctive, and Innovative” enterprise to promote the deep integration of repair technology with green building materials, providing designers and owners with full-chain solutions from creative realization to long-term maintenance, so that every architectural detail stands the test of time.