How to Select UHPC Reinforcement Components for Old Building Renovation: Key Factors and Practical Strategies

Amid the wave of urban renewal, the renovation of old buildings is not only a continuation of historical context, but also a contemporary proposition concerning structural safety and functional upgrading. As a dedicated specialist in the field of ultra-high performance concrete (UHPC), Qinglong Group, built on 28 years of full-chain experience, deeply understands the decisive role that reinforcement component selection plays in the success of renovation projects. This article systematically breaks down the core logic of UHPC reinforcement component selection, providing designers and owners with a reference framework combining technical depth with practical value.

1. The Underlying Logic of UHPC Reinforcement Selection: Dynamic Balance Between Material Properties and Renovation Needs

The complexity of old building renovation demands that reinforcement materials not only deliver the mechanical performance required for structural strengthening, but also adapt to the spatial constraints of existing buildings and the need to preserve their historical character. With compressive strength exceeding 150MPa and tensile strength exceeding 8MPa, and a self-weight only 60% that of conventional concrete, UHPC achieves a technical breakthrough in being lightweight yet high-strength. Unlike glass fibre reinforced concrete (GRC), which focuses on decorative applications, and glass fibre reinforced gypsum (GRG), which specializes in interior shapes, UHPC's core advantages in reinforcement lie in crack resistance and durability—its dense microstructure keeps carbonation depth below 0.1mm per year, greatly extending the service life of renovated buildings. Qinglong Group's participation in formulating the industry standard “General Technical Conditions for Ultra-High Performance Concrete (UHPC) Non-Load-Bearing Components” serves as an authoritative endorsement of the quantified application of these material properties.

2. Key Selection Dimensions: All-Factor Considerations from Load Analysis to Interface Adaptation

In practical projects, component selection requires a three-dimensional evaluation system of “structural diagnosis - performance matching - construction adaptation”. First, load conditions determine the basic choice: for bridge renovations subject to dynamic loads, UHPC precast composite beams are recommended, as their randomly distributed fibers enhance fatigue resistance; for static load-bearing wall strengthening, UHPC spray-applied layers can be selected, combined with post-installed rebar technology to achieve coordinated load-bearing with the original structure. Second, spatial constraints give rise to customized solutions: in historical building renovations, the Qinglong team once used parametric design to keep the thickness of UHPC reinforcement components within 50mm, meeting strengthening requirements while avoiding damage to the original building profile. Notably, interface treatment is key to successful selection: Qinglong's patented interface treatment agent (Patent No. ZL2023XXXXXXXXX) can increase the bond strength between new and old materials by 40%, effectively preventing peeling failure.

3. Practical Strategies: Full-Chain Services Empowering Selection Implementation

As a national high-tech enterprise integrating detailed design, production and manufacturing, and construction and installation, Qinglong Group has established a closed-loop service model of “digital simulation - prefabricated production - precise construction”. In the Dongguan Women and Children's Activity Center renovation project, the team used BIM technology to simulate the stress states of different UHPC components and finally selected integrated UHPC decorative load-bearing panels, solving the structural strengthening problem while continuing the old building's character through texture replication. This “technology + art” solution is a vivid practice of Qinglong's mission of “creating beautiful architecture”. For overseas projects, such as the renovation of a historic hotel in Malaysia, Qinglong's Malaysian production base enabled localized production of UHPC components, reducing transportation costs by 30% and shortening the delivery period by 40 days, demonstrating the synergistic advantages of a global supply chain.

UHPC reinforcement selection in old building renovation is, in essence, the unification of technical rationality and humanistic care. With 28 years of industry experience, Qinglong Group offers designers and owners not only high-performance material products, but also full life-cycle solutions ranging from design optimization to lifetime maintenance. Under the vision of “becoming an outstanding world-leading UHPC/GRC/GRG/GRP manufacturer”, Qinglong will continue to drive material innovation and technological iteration, bringing new life to every old building through strengthening and renovation, and achieving an eternal balance between safety and aesthetics.