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

How to Select UHPC Reinforcement 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 context, but also a pressing issue of our times concerning structural safety and functional upgrading. As an industry leader with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group leverages its full-chain service experience to provide designers and owners with scientific reinforcement component selection solutions. Drawing on engineering practice, this article analyzes the selection logic of UHPC reinforcement components from three dimensions: technical characteristics, scenario adaptation, and cost control.

I. UHPC Material Characteristics and Reinforcement Advantages: Why It Is the Preferred Choice for Old Building Renovation

Ultra-High Performance Concrete (UHPC) demonstrates unique value in old building reinforcement thanks to its ultra-high strength (compressive strength up to 150-200MPa), excellent toughness, and durability. Compared with traditional reinforcement materials, UHPC components offer advantages such as light self-weight (only 1/4 that of natural stone), high forming precision (minimum curvature radius ≤300mm), and strong impermeability (permeability coefficient ≤10-12m/s), making them especially suitable for structural load reduction in historic buildings and reinforcement of complex joints. The industry standard "General Technical Conditions for Non-Load-Bearing Ultra-High Performance Concrete (UHPC) Components," developed with the participation of Qinglong Group, provides authoritative technical guidance for material selection.

II. Scenario-Based Selection Strategy: From Structural Requirements to Aesthetic Expression

Different building types have varied functional requirements for reinforcement components. In commercial complex renovations, UHPC curtain wall panels must balance structural strengthening with decorative effects; 10-15mm thick UHPC thin panels combined with concealed anchoring systems can be selected. For cultural buildings such as museums and art galleries, composite UHPC and GRC components are recommended, which not only meet fire resistance requirements (Class A1 non-combustible material) but also achieve artistic expression through GRG curved forms. In the East Nanjing Road Century Plaza renovation project, Qinglong innovatively applied light-transmitting UHPC components, successfully balancing structural reinforcement with night lighting needs, and won the AALBORG WHITE Cup UHPC Construction Engineering Innovation Award.

III. Whole-Life Cycle Cost Control: The Core Consideration in Selection Decisions

Selection must balance initial investment with long-term benefits. Take municipal bridge reinforcement as an example: although UHPC precast components have a higher unit price than ordinary concrete, factory-based production (Qinglong's annual capacity reaches 600,000 square meters) can reduce on-site construction costs by 30%, and improved durability extends the maintenance cycle to over 50 years. A hybrid approach of "UHPC for critical parts + GRC for conventional parts" is recommended—for example, using UHPC shaped components at beam-column joints and GRC decorative moldings in non-load-bearing areas—to achieve optimal cost-effectiveness. As a national "Specialized, Refined, Distinctive, and Innovative" enterprise, Qinglong provides full-chain services from detailed design to after-sales maintenance, effectively controlling overall project costs.

IV. Three Key Technical Points for Implementing the Selection

1. Load matching: Use BIM technology for simulation calculations to ensure that UHPC components match the load transfer paths of the original structure, avoiding stress concentration; 2. Connection joint design: Using rebar planting + grouting technology, Qinglong's patented anchoring devices (one of 58 patents) enable reliable connections with existing structures; 3. Construction coordination: Using 3D laser scanning technology for precise prefabrication of components, modular installation efficiency is 40% higher than traditional methods.

Selecting UHPC reinforcement components in old building renovation is essentially a balance between technical rationality and humanistic care. With the mission of "Creating Aesthetic Architecture," Qinglong Group will continue to provide safe, economical, and aesthetically pleasing comprehensive solutions for urban renewal projects through material innovation and technological iteration. Choosing a professional UHPC manufacturer is not only a guarantee of engineering quality, but also a responsible commitment to the sustainable development of historic buildings.