Analysis of Mold Cost Ratio in Total Project Cost for Hollow UHPC Shapes and Discussion of Influencing Factors

Molds are the "skeleton" of UHPC sculptural art, and the ability to control their cost directly determines a project's economics and artistic expressiveness.

In the field of contemporary architectural decoration, hollow-out UHPC (Ultra-High Performance Concrete) has become the preferred material for landmark building facade design thanks to its outstanding mechanical properties and ultimate sculptural freedom. However, its complex forming process gives mold cost a special position in the total project budget; how to scientifically analyze this proportion and accurately identify the influencing factors has become a core issue for designers and owners at the project decision-making stage. As an industry pioneer with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group draws on more than 1,000 engineering projects to analyze the cost structure logic of hollow-out UHPC sculptural molds from a full-chain perspective.

1. Proportion Characteristics and Industry Benchmarks of Hollow-out UHPC Sculptural Mold Costs

According to statistics from Qinglong Group's detailed design database, mold costs account for approximately 15%-25% for conventional flat-panel UHPC components, while for hollow-out sculptural components—which must accommodate complex spatial curved surfaces and hollow patterns—this share typically climbs to 30%-45%. In award-winning projects such as the Dongguan Women and Children's Activity Center, when the hollow-out ratio exceeds 60% and includes hyperbolic curved shapes, this proportion can even reach 52% of the total cost. This figure is significantly higher than the mold cost share of traditional GRC (Glass Fiber Reinforced Concrete) components (20%-30%), mainly due to the stringent requirements of UHPC materials for mold precision (errors must be controlled within ±0.5mm) and surface finish (Ra≤3.2μm).

2. Four Key Factors Determining Hollow-out UHPC Mold Costs

1. Shape Complexity and Process Compatibility: Linear hollow-out patterns can adopt modular steel molds (unit price approx. 800-1200 RMB/㎡), whereas parametrically generated non-linear hollow-out patterns require custom carved wooden molds or 3D-printed molds, directly raising costs by 3-5 times. In the Nanjing East Road Century Plaza translucent concrete project, a light-transmitting hole array design with 0.3mm precision extended the mold fabrication cycle by 40% and increased costs by 28%.

2. Mold Material Selection and Reuse Cycles: Although steel molds require a high initial investment (1500-2000 RMB/㎡), they can be reused more than 50 times, making them suitable for large-volume standardized components; GRP (fiberglass) molds (600-800 RMB/㎡) allow about 15-20 reuse cycles and are better suited to small- and medium-volume special-shaped components. Qinglong's production base optimized mold segmentation plans through BIM technology, raising steel mold utilization by 23% on a commercial complex project and reducing cost per square meter by 17%.

3. Production Scale and Degree of Customization: When the number of components exceeds 500, amortized mold costs can drop below 25%. In an overseas airport project, Qinglong adopted a "universal mold frame + replaceable hollow-out insert" design, allowing 12 hollow-out patterns to share the base molds and cutting overall costs by 31%.

4. Detail Design and Technical Integration Capability: Inexperienced design often leads to redundant mold structures. Through Rhino parametric modeling and finite element stress analysis, Qinglong optimized the mold support structure in a museum hollow-out facade project, reducing steel usage by 18% while raising the demolding success rate from 82% to 99%.

3. Qinglong's Full-Chain Service Path to Optimizing Mold Costs

As a National High-Tech Enterprise and a participant in setting UHPC industry standards, Qinglong Group has built a full-process cost control system covering "design optimization – mold development – intelligent manufacturing – construction simulation." Leveraging the scale effects of its own 600,000 ㎡ production base, combined with the modular mold library at its Nanning, Guangxi base, it can reduce mold costs for conventional hollow-out shapes by 15%-20%. In a landmark project in Saudi Arabia, the Qinglong team innovatively applied a "sand 3D printing + surface metal spraying" process, successfully keeping the mold cost of special-shaped hollow-out UHPC components within 35% of the total cost—12 percentage points lower than the industry average.

In essence, mold cost management for hollow-out UHPC sculptural forms is a fusion art of technological innovation and engineering experience. Backed by 28 years of professional expertise, and through collaborative innovation in materials science, digital technology, and engineering management, Qinglong Group is redefining the cost boundaries of UHPC artistic forms. For designers and owners seeking a balance between architectural aesthetics and economics, choosing a UHPC manufacturer with full-chain service capability is the key guarantee for fulfilling the mission of "creating beautiful architecture."