UHPC Construction: Key Points and Technical Specifications Analysis

**An Analysis of Key Points and Technical Specifications to Note in UHPC Construction**

In the field of modern architecture, Ultra-High Performance Concrete (UHPC) has become the preferred material for landmark buildings, high-end commercial complexes, and municipal engineering thanks to its ultra-high strength, excellent durability, and outstanding formability. However, the UHPC construction process demands extremely high technical precision and regulated management; any oversight at any stage may compromise the final performance. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP, Qinglong Group, drawing on the practice of hundreds of projects, provides an in-depth analysis of the core points and technical specifications of UHPC construction, offering a professional reference for designers, owners, and contractors.

### **1. Material Preparation: Source Control for UHPC Performance Assurance**

The construction quality of UHPC depends first on the stability of the materials themselves. Before construction, the raw material proportions must be strictly controlled to ensure that cement, silica fume, ultra-fine quartz sand, and other components comply with the "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)" (Plan No. 2024-0232T-JC) standard. For example, the steel fiber content should be controlled at 2%–5%, and the mixing time should be no less than 5 minutes to ensure uniform fiber dispersion. Qinglong Group's production base in Nanning, Guangxi is equipped with a fully automatic mixing system, using BIM technology to achieve precise mix proportion control and ensure that the performance deviation of each batch of material does not exceed 3%.

### **2. Formwork Engineering: The Core Guarantee of UHPC Forming Precision**

UHPC's high fluidity and low shrinkage place stringent demands on formwork. The formwork must have sufficient rigidity to avoid deformation during pouring, and its surface must be polished to ensure the smoothness of the component surface. For complex shapes such as double-curved surfaces and hollow-out patterns, fiberglass (GRP) molds are recommended; their lightweight nature reduces installation difficulty, and they can be reused more than 50 times. In Qinglong's Century Plaza renovation project on Nanjing East Road, three-dimensional scanning and parametric design kept the formwork error for light-transmitting UHPC components within ±0.5mm, ensuring the final decorative effect.

### **3. Pouring and Curing: Key Processes for UHPC Strength and Durability**

During pouring, UHPC requires mechanical vibration; the vibration time is determined by when the surface shows paste with no air bubbles, avoiding over-vibration that would cause uneven steel fiber distribution. The curing stage requires strict control of temperature and humidity; steam curing is recommended, with curing for 48 hours at 60–80°C to ensure a 28-day compressive strength above 150MPa. In the Dongguan Women and Children's Activity Center project, Qinglong innovatively adopted a "gradient curing method," increasing the early strength of UHPC components by 20% and effectively shortening the construction period.

### **4. Installation and Anchoring: The Final Line of Defense for Structural Safety**

Installation of UHPC components must follow the "position first, then fix" principle, using three-dimensional laser scanning technology to ensure installation precision. Anchoring nodes should pass load-bearing capacity verification, and the spacing of embedded parts generally should not exceed 600mm. For elevated components such as exterior wall cladding panels, wind load and seismic action checks are required. Qinglong's self-developed "modular installation system" enables rapid component docking, improving installation efficiency by 40%, and the reliability of the anchoring system has been verified through 15-year durability testing.

### **5. Whole-Process Quality Control: Qinglong's Systematic Practice from 28 Years of Experience**

As a national high-tech enterprise and a participant in UHPC standard-setting, Qinglong has established a full-chain quality control system from detailed design to after-sales maintenance. By introducing RFID chip traceability technology, the entire process of component production, transportation, and installation is traceable; pre-construction technical briefings and simulated installations reduce on-site problems; and regular post-sale inspections provide maintenance service for up to 5 years. This system has been successfully applied in overseas projects in Malaysia, Australia, and elsewhere, demonstrating the international competitiveness of Chinese UHPC technology.

UHPC construction is a combination of technology and experience; only by strictly following specifications and relying on a professional team can its material advantages be fully realized. Guided by the philosophy of "meticulousness and constant refinement," Qinglong Group continues to promote UHPC technological innovation and application, providing the construction industry with solutions that combine aesthetics and performance. Choosing a professional UHPC manufacturer is not only a guarantee of project quality but also a long-term commitment to architectural aesthetics and safety.