Fiber Orientation Optimization for Double-Curved UHPC Shaping: A Full-Dimensional Solution from Process to Practice

Fiber orientation determines the mechanical baseline and shape longevity of double-curved UHPC; only scientific optimization can achieve a perfect unification of material performance and artistic form. As an industry leader with 28 years of deep expertise in the UHPC field, Qinglong Group has accumulated mature fiber orientation optimization experience through projects such as the double-curved sculptures at the Shanghai Astronomy Museum and the irregular-shaped components of the Guangxi New Media Center.

#Rheological Parameter Control: Laying the Foundation for Fiber Orientation
The fiber distribution in double-curved UHPC is directly influenced by rheological properties. Qinglong optimizes material viscosity by adjusting the water-binder ratio (controlled within the 0.17–0.19 range) and admixture dosage. Combined with X-ray computed tomography technology, fiber distribution is monitored in real time to ensure fibers do not clump or concentrate where the curvature of the double-curved surface changes. Drawing on the industry standard “General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC),” which Qinglong helped formulate, a standardized rheological parameter database has been established to accommodate double-curved forms of varying curvatures.

#Forming Process Adaptation: Guiding Ordered Fiber Distribution
For the complex geometry of double-curved surfaces, Qinglong employs a composite process of “zoned pouring + directional vibration.” In areas of higher curvature, low-frequency vibration guides fibers to align along the tangent direction of the surface; at critical load-bearing sections of components, high-pressure spray forming technology is used to raise the fiber orientation coefficient above 0.9. In the double-curved UHPC sculpture project exceeding 3 meters at the Shanghai Astronomy Museum, this process achieved uniform fiber distribution, increasing flexural strength by more than 25% compared to conventional processes, perfectly meeting the mechanical demands of complex forms.

#Numerical Simulation Empowerment: Accurately Predicting Optimization Results
Using fluid dynamics models and finite element simulation technology, Qinglong simulates in advance the fiber movement trajectories during the pouring of double-curved UHPC. A fiber orientation prediction model was established based on the Jeffery equation, combined with CFD simulation to correct flow velocity gradients, keeping prediction deviation within 5%. In a double-curved curtain wall project in Nanning, numerical simulation was used to optimize the pouring path, preventing disorderly fiber accumulation at surface corners and significantly reducing the risk of later-stage cracking.

Fiber orientation optimization for double-curved UHPC is not a single process adjustment, but rather full-chain collaboration across design, materials, and construction. With 58 related patents and full-chain service capabilities, Qinglong transforms laboratory data into practical solutions, ensuring that every double-curved form possesses both artistic tension and lasting performance.