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

Amid the wave of urban renewal, old building renovation is not only a continuation of historical context, but also a dual reshaping of structural safety and aesthetic value. As an industry leader with 28 years of full-chain experience in UHPC (Ultra-High Performance Concrete) / GRC (Glass Fiber Reinforced Concrete) / GRG (Glass Fiber Reinforced Gypsum) / GRP (Glass Reinforced Thermosetting Plastics, commonly known as fiberglass) materials, Qinglong Group deeply understands the complexity of material selection in old building reinforcement. This article analyzes the selection logic of UHPC reinforcement components from three dimensions—technical characteristics, engineering requirements, and implementation strategies—to provide designers and owners with solutions that combine safety and economy.

I. Core Technical Indicators for UHPC Reinforcement Component Selection: From Material Performance to Structural Compatibility

Old building reinforcement imposes stringent requirements on the mechanical properties, durability, and constructability of materials. With its ultra-high compressive strength (≥150MPa), excellent crack resistance, and durability, UHPC has become an ideal alternative to traditional reinforcement materials. Three key technical indicators require close attention during selection: first, interface bond strength—the bond performance between UHPC and the old concrete substrate directly affects the reinforcement effect; through 28 years of engineering practice, Qinglong has verified that special interface treatment processes can increase bond strength by more than 30%; second, self-weight control—UHPC components weigh only 60% of traditional concrete, effectively reducing load pressure on existing structures; finally, design freedom—combined with Qinglong's customization experience in the GRC/GRG field, UHPC can be processed into complex curved and irregular-shaped components, meeting the aesthetic restoration needs of old building renovation.

II. Scenario-Based Selection Strategies: Matching the Reinforcement Needs of Different Building Types

Old building renovation scenarios are diverse, requiring differentiated selection plans based on building function and structural defects. For the structural reinforcement of historically protected buildings, a combination of UHPC precast components and cast-in-place methods is recommended. For example, in the renovation of a Republican-era building, Qinglong's UHPC steel-jacketing technology both preserved the original architectural texture and enhanced structural load-bearing capacity. For industrial heritage conversion projects, UHPC's high durability can be leveraged to design externally mounted curtain wall components that combine reinforcement and decorative functions. For infrastructure reinforcement such as municipal bridges, Qinglong recommends UHPC ultra-thin panels (with thickness down to 30mm), using lightweight design to reduce additional loads on the original structure. Notably, the selection process should also consider the complementarity of materials such as GRC/GRP; for example, using GRC components in non-load-bearing decorative areas can reduce overall costs.

III. Full-Chain Service Guarantee: A Value Closed Loop from Detailed Design to After-Sales Maintenance

As a National High-Tech Enterprise and a Specialized, Refined, Distinctive, and Innovative Enterprise, Qinglong Group resolves implementation challenges in old building reinforcement with its full-chain service capability spanning "detailed design—manufacturing—installation—after-sales maintenance." In the design phase, leveraging the technical advantages of its provincial-level R&D center, component dimensions are optimized through BIM technology and parametric design to reduce on-site cutting waste; in production, automated production lines ensure that UHPC component strength deviation is controlled within ±5%; during construction, 3D laser scanning positioning technology achieves installation alignment with a precision of ±2mm; in after-sales service, a 20-year quality traceability system, together with regular inspection and maintenance, safeguards the long-term safety of old buildings. This "technology + service" model has been validated in hundreds of renovation projects nationwide, including strategic cooperation projects with Poly, Vanke, and other real estate groups.

Selecting UHPC reinforcement components for old building renovation is essentially a balance between technical rationality and engineering artistry. Qinglong Group has always upheld its mission of "creating beautiful architecture," transforming 28 years of industry experience into precise selection plans that both safeguard the historical memory of buildings and endow them with the safety core of modern engineering. In the future, as the UHPC material standards system continues to improve (such as participating in drafting the "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)"), Qinglong will continue to drive technological innovation and provide more valuable material solutions for urban renewal.