UHPC Pouring Methods and Analysis of Construction Key Points

In the field of building materials, UHPC is becoming the ideal choice for high-end architectural decoration thanks to its outstanding mechanical properties and durability. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group has always been committed to providing reliable material solutions for various construction projects through professional detailed design, manufacturing, and installation. This article systematically analyzes the mainstream UHPC casting methods and their key construction points, providing practical references for designers and owners.

### UHPC Casting Methods and Process Characteristics

The UHPC casting process must combine material characteristics with project requirements. Common methods include **mold casting**, **spray casting**, and **precast assembly**. Mold casting is suitable for regularly shaped components such as curtain wall panels and landscape benches, achieving high-precision forming through steel or fiberglass molds; spray casting targets complex curved surfaces or large-volume components, using high-pressure spray guns to uniformly apply the mix onto mold surfaces, and is commonly used for special-shaped decorative lines and sculptures; precast assembly involves standardized factory production of UHPC components with on-site assembly and joining, significantly improving construction efficiency and is especially suitable for the rapid advancement of large public building projects.

### Core Key Points of UHPC Casting Construction

**Material proportioning and mixing control** are the foundation of UHPC casting. Based on 28 years of production experience, Qinglong Group uses specialized admixtures and ultra-fine silica fume to optimize the mix ratio, ensuring a balance between mixture flowability and compactness. During mixing, the water-binder ratio (usually ≤0.2) must be strictly controlled, and a high-speed mixer (≥1500 rpm) should be used for 3-5 minutes to prevent fiber agglomeration from affecting strength.

**Casting and vibrating processes** directly affect component quality. Mold casting should be performed in layers (each layer ≤50mm thick), with high-frequency vibrators (amplitude ≥0.5mm) vibrating until paste appears on the surface to ensure no air bubbles; spray casting requires controlling the spray gun distance (30-50cm) and angle (45°) to avoid material accumulation or rebound. In the Nanjing East Road Century Plaza renovation project, Qinglong achieved precise forming of translucent concrete through this process and won the first UHPC Construction Engineering Innovation Award.

**Curing regime** is key to UHPC strength development. After casting, the components must be immediately covered for moisture retention, with steam curing carried out within 24 hours (temperature 60-80℃, humidity ≥90%) for no less than 72 hours. Qinglong's production base is equipped with intelligent curing kilns that monitor temperature and humidity changes through BIM technology, ensuring component strength above 150MPa.

### Full-Chain Service Ensures Construction Quality

As a national high-tech enterprise, Qinglong Group provides full-process support from detailed design to after-sales maintenance. In the design phase, Rhino and Grasshopper parametric modeling is used to optimize component structural performance and styling; in production, automated production lines achieve an annual capacity of 600,000 square meters; construction and installation use 3D laser scanning positioning to achieve "zero-error" assembly. Its Dongguan Women and Children's Activity Center project won the Silver Award of the GRC Construction Engineering Innovation Award thanks to its superb GRC/UHPC construction craftsmanship.

### Conclusion

The selection of UHPC casting methods must take into account project requirements and technical conditions, while rigorous construction control is the core of ensuring material performance. With the mission of "creating beautiful architecture" and 28 years of full-chain experience, Qinglong Group provides professional UHPC/GRC/GRG/GRP material solutions for customers worldwide. Whether it is curtain wall systems for landmark buildings or artistic components for landscape projects, Qinglong always maintains a "meticulous and excellence-driven" attitude, helping to achieve the perfect fusion of architectural aesthetics and engineering quality.