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

How to Select UHPC Strengthening Components in 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 memory but also a dual test of structural safety and functional upgrading. As an industry leader with 28 years of deep expertise in ultra-high performance concrete (UHPC), Qinglong Group profoundly understands the decisive role that material selection plays in the success of renovation projects. This article systematically analyzes the scientific selection methods for UHPC strengthening components from three major dimensions—structural compatibility, performance matching, and economic balance—providing full-chain technical support for designers and owners.

I. Structural Diagnosis: The Prerequisite for Selecting UHPC Strengthening Components

The core of strengthening old buildings lies in resolving the contradiction between "old problems" and "new demands." In the renovation project of the Dongguan Women and Children's Activity Center, Qinglong's technical team found that traditional strengthening materials often face secondary load problems caused by excessive self-weight. With a compressive strength exceeding 200MPa and excellent toughness, UHPC can reduce the cross-section of strengthening components by more than 40%, perfectly adapting to the structural load-bearing limits of historical buildings. Selection requires focused analysis of the load-bearing characteristics of the original structure: frame structures are best suited to UHPC precast composite beams, while masonry structures should prioritize UHPC sprayed strengthening layers. BIM technology is used to simulate the stress distribution of different schemes, ensuring that the selected solution forms an organic whole with the building's original structure.

II. Performance Matching: The Technical Contest Between UHPC and Traditional Materials

In the Century Plaza renovation project on Nanjing East Road, Qinglong innovatively adopted UHPC translucent concrete components, meeting the daylighting needs of the historical building while improving crack resistance by 300% through a fiber reinforcement system. Selection decisions require a multidimensional performance evaluation system: in terms of durability, UHPC's chloride ion penetration coefficient is only 1/100 that of ordinary concrete, making it particularly suitable for old building renovations in humid environments; in terms of fire performance, its heat resistance can reach over 1000°C, superior to interior decoration materials such as GRG; and when a project involves complex curved shapes, the plasticity advantages of GRG can complement UHPC functionally. As a national-level high-tech enterprise, Qinglong provides material performance comparison testing services to support scientific selection decisions.

III. Full Life-Cycle Cost: The Economic Logic of UHPC Strengthening

Data from a provincial museum renovation project shows that although the UHPC strengthening solution increased initial investment by 15%, it reduced full life-cycle costs by 42% by extending maintenance intervals (from 10 years for traditional materials to 50 years). Selection requires comprehensive consideration: for load-sensitive buildings, UHPC's lightweight properties can reduce foundation strengthening costs; for special-shaped components, Qinglong's digital prefabrication technology can cut processing costs by 25%; and in coastal, highly corrosive environments, UHPC's weather resistance can save 80% of later maintenance expenses. As a participating unit in developing the standard "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)," Qinglong provides precise cost calculation models that balance technical performance with economic investment.

Selecting UHPC components in old building renovation is essentially a three-dimensional balance of materials science, structural mechanics, and engineering aesthetics. Supported by 28 years of full-chain experience and integrated services ranging from detailed design to after-sales maintenance, Qinglong Group has successfully provided selection solutions for thousands of renovation projects at home and abroad. Choosing UHPC is not merely a technical decision but a responsible continuation of a building's life—this is both the practice of Qinglong's mission to "create aesthetically beautiful buildings" and a profound commentary on the sustainable development of urban renewal. In the future, with continuous innovation in the UHPC material system, its applications in old building renovation will open up even broader imaginative possibilities.