How to Select UHPC Reinforcement Components in Old Building Renovation: Analysis of Key Factors and Practical Strategies

Amid the wave of urban renewal and old building renovation, ultra-high performance concrete (UHPC) has become an innovative choice in the field of structural reinforcement thanks to its outstanding mechanical properties and design flexibility. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group combines full-chain service experience—from technical selection to engineering practice—to provide designers and owners with scientific reinforcement component solutions.

Key Considerations for Selecting UHPC Reinforcement Components

Old building reinforcement must balance three major goals: structural safety, historical character, and cost control. The selection of UHPC components should focus on the following key factors: In terms of material performance compatibility, UHPC panels or custom profiles with compressive strength ≥150MPa should be selected according to the original building structure type (such as brick-concrete or frame structures), whose fiber reinforcement system can effectively enhance component ductility; in joint connection design, mechanical anchoring of embedded steel bars with the original structure, combined with Qinglong's patented interface treatment technology, achieves collaborative load-bearing between new and old structures. In addition, the lightweight nature of the components (density only 80% of traditional concrete) reduces additional loads on the original building foundation, making them especially suitable for the minimal intervention principle applied to historic conservation buildings.

Scenario-Based Selection Strategies and Engineering Practice

For different renovation scenarios, UHPC reinforcement components exhibit differentiated application logic: in beam reinforcement of existing buildings, UHPC laminated layer technology is adopted, with factory-prefabricated thin panels (50-80mm thick) cast on-site, reducing construction time by 30% compared to the traditional section enlargement method; for column reinforcement, Qinglong's self-developed UHPC sleeve system achieves 360° wrapping, with its circumferential confinement effect increasing axial compressive load capacity by more than 40%. In a provincial-level cultural relic protection unit renovation project, customized UHPC integrated stone-imitation decorative reinforcement components both met structural strengthening requirements and restored the texture of the ancient building; this technology was selected as a demonstration case for the Huaxia Award of the Ministry of Housing and Urban-Rural Development.

Full-Chain Services Empowering Reinforcement Project Delivery

As a national-level high-tech enterprise, Qinglong Group has built a closed-loop service system spanning from detailed design to after-sales maintenance: BIM technology is used for parametric modeling of components, ensuring precise matching with old building structures; backed by an annual capacity of 600,000 square meters at its Guangxi production base, complex special-shaped components are industrially prefabricated; on-site construction adopts modular installation techniques, combined with 3D laser scanning positioning technology, keeping installation errors within ±2mm. For old building renovations in coastal areas, chloride-ion-penetration-resistant UHPC components have been specially introduced, with 28-day electric flux ≤500C, and durability indicators far exceeding industry standards.

From the light-transmitting UHPC components in the renovation of Century Plaza on Nanjing East Road to the GRC-UHPC composite curtain wall of the Dongguan Women and Children's Activity Center, Qinglong's 28 years of technical expertise prove that scientific UHPC reinforcement component selection is not only an optimization of material performance, but also a comprehensive solution for structural safety, cultural heritage, and green construction. In the future, with the implementation of the industry standard 'General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC),' the application of UHPC in the field of old building renovation will embrace more standardized development opportunities.