What Are the Steps in the Production Process of UHPC Exterior Wall Decorative Lines — A Detailed Explanation of the Complete Production Process and Key Steps of UHPC Exterior Wall Decorative Lines

In the field of modern architectural decoration, Ultra-High Performance Concrete (UHPC), with its outstanding mechanical properties and artistic expressiveness, is becoming the ideal choice for exterior wall decorative lines. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will explain in detail the manufacturing process of UHPC exterior wall decorative lines in this article, providing professional technical reference for designers and owners.

1. From Drawings to Reality: The Detailed Design Stage of UHPC Decorative Lines

The production of UHPC exterior wall decorative lines begins with precise detailed design. Relying on BIM technology and parametric design software, the Qinglong team transforms the architect's creative concepts into producible engineering drawings. At this stage, the cross-sectional dimensions, curvature radii, and surface textures of the lines must be determined in accordance with the overall style of the building facade, while structural optimization is carried out with consideration of UHPC material properties. For example, in the renovation project of Century Plaza on Nanjing East Road, complex curved-surface modeling of light-transmitting UHPC lines was achieved through Rhino and Grasshopper software, ensuring modeling accuracy of ±0.5mm.

2. The Art of Material Science: Customization and Mixing of the UHPC Formula

As the core competitiveness of a UHPC manufacturer, Qinglong uses quartz sand, cement, steel fibers, and mineral admixtures with specific gradations, optimizing the mix proportion through orthogonal tests. During production, the water-binder ratio is strictly controlled between 0.18 and 0.22, and a planetary mixer is used for high-speed mixing (rotational speed ≥1500r/min) to ensure uniform dispersion of steel fibers. To meet the needs of different projects, pigments can be added to achieve a fair-faced concrete effect, or glass fibers can be added to improve toughness, satisfying the requirements of the industry standard "General Technical Conditions for Ultra-High Performance Concrete (UHPC) Non-Load-Bearing Components".

3. Mould Technology: The Key Guarantee of UHPC Forming Precision

The mould process directly determines the forming quality of the lines. Qinglong adopts a combined process of high-precision steel moulds and elastic silicone moulds, using modular steel moulds for straight lines and 3D-printed resin moulds for special-shaped components. At the production base in Nanning, Guangxi, the mould workshop is equipped with five-axis machining centers, ensuring a mould surface finish of Ra0.8μm. Before casting, the moulds must be preheated (50-60°C) and evenly coated with a special release agent, laying the foundation for smooth demoulding of the components.

4. Casting and Curing: Scientific Control of UHPC Strength Development

The casting process adopts vacuum-assisted casting technology combined with high-frequency vibration (frequency ≥200Hz) to remove air bubbles and ensure concrete compactness. Steam curing is carried out immediately after forming, with 24 hours of curing at a constant temperature of 90°C, allowing the early strength of UHPC to quickly reach 80% of the design value. After steam curing, 7 days of natural curing are carried out, and the final compressive strength can reach over 150MPa, with flexural strength ≥25MPa, far exceeding the performance indicators of traditional decorative materials.

5. Fine Machining and Quality Inspection: Creating Zero-Defect Products

After demoulding, the UHPC lines must undergo fine grinding, cutting, and surface treatment. Qinglong has introduced automated grinding robots to achieve precise machining of edge fillets (R≥3mm). The quality inspection process uses ultrasonic flaw detection and rebound hammer testing, and key items such as dimensional deviation (≤±2mm) and surface flatness (≤1mm/m) are executed under enterprise internal control standards stricter than national standards. Each batch of products is accompanied by a quality traceability card containing an RFID chip, enabling full life-cycle management.

6. Packaging, Transportation, and Installation Guidance: Ensuring On-Site Implementation

Finished products are packaged using a combination of EPE pearl cotton and wooden pallets, and monitored in real time via a GPS positioning system during transportation. For construction and installation, Qinglong provides dedicated anchoring system design solutions, such as back-bolted connection joints that can withstand a pull-out force ≥1.5kN. In the Dongguan Women and Children's Activity Center project, 3D laser scanning positioning technology enabled the seamless joining of more than 1,200 UHPC lines, with installation accuracy controlled within ±3mm.

As a national high-tech enterprise and a participant in the formulation of UHPC standards, Qinglong Group has always upheld the mission of "Creating Aesthetic Architecture", integrating 28 years of technical expertise into every product. Full-chain services from detailed design to after-sales maintenance not only ensure the perfect presentation of UHPC exterior wall decorative lines, but also provide architectural designers with unlimited possibilities for realizing their creativity. Choosing Qinglong means choosing a professional solution that combines artistic beauty with engineering quality.