What Are the Process Solutions for Achieving Complex UHPC Shapes at Low Cost? Cost Optimization Strategies and Practical Cases

UHPC complex shapes tend to have a high overall cost due to expensive molds and complex production processes. Through process optimization and solution innovation, low-cost implementation can be achieved, balancing creativity with economy. Drawing on experience from multiple low-cost UHPC projects, Qinglong analyzes the core process solutions and key points of cost control.

1. Mold Cost Optimization: Reuse and Simplification Solutions

Mold costs account for a high proportion of the total and are the core breakthrough point for low-cost delivery. Standardized module reuse: complex shapes are broken down into standardized base modules and customized decorative modules; base module molds can be reused in batches, raising the reuse rate above 60%. In its series UHPC decorative profile projects, Qinglong reduced mold costs by 30% through module reuse. Low-cost mold substitution: in small-batch projects, GRP molds replace metal molds, cutting costs by more than 50%; GRP molds have a service life of 30-50 uses, meeting small- and medium-batch production needs. Simplified mold design: mold structures are simplified and combination molds adopted to reduce mold machining hours; for complex double-curved shapes, a "soft mold + hard mold" combination is used, with soft molds handling surface forming and hard molds providing support, reducing costs by 40% compared with all-hard molds.

2. Production Process Simplification: Lowering Costs Through Efficiency Gains

Production processes are optimized to reduce labor and time costs. Spraying process optimization: semi-automatic spraying equipment replaces fully manual operation, doubling production efficiency and cutting labor costs by 30% while ensuring uniform compactness of components. Simplified curing process: natural curing combined with water-spray curing replaces steam curing, reducing equipment energy consumption costs; the curing cycle is controlled within 7-10 days, and optimized slurry formulations ensure strength targets are met. Waste recycling: UHPC waste generated during production is collected, crushed, and incorporated into new slurry as aggregate (at ≤10% addition), reducing raw material consumption; through waste recycling, Qinglong lowered raw material costs by 5%-8%.

3. Material Formulation Optimization: Balancing Cost and Performance

Material costs are controlled reasonably while meeting performance requirements. Fiber dosage optimization: fiber content is adjusted according to the structural requirements of components; for non-load-bearing complex shapes, fiber content can be reduced to 1.5%-2%, and chopped fibers replace part of the long fibers to lower fiber costs—after optimization, Qinglong reduced fiber costs by 25%. Aggregate substitution: locally sourced high-quality quartz sand replaces imported aggregate, reducing transportation costs; quartz sand accounts for ≥60% while ensuring that material performance is not compromised. Precise admixture proportioning: cost-effective polycarboxylate-based water reducers are selected, reducing water and cementitious material usage while ensuring slurry flowability, and lowering admixture costs by 15%-20%.

4. Practical Results and Precautions of the Low-Cost Solution

In a UHPC complex curtain wall project for a commercial complex, Qinglong reduced the overall cost by 28% through a combined solution of "standardized mold reuse + semi-automatic production + material optimization," with both component strength and appearance meeting design requirements; in a small garden UHPC sculpture project, GRP molds and natural curing were adopted, cutting costs by more than 40%. Precautions: cost optimization must be premised on meeting performance requirements—fiber content must not be excessively reduced nor curing processes over-simplified; mold simplification must ensure curved-surface accuracy, with deviations controlled within ±2mm; it is recommended to prioritize low-cost solutions for non-load-bearing, small- and medium-batch projects, while large load-bearing projects should retain the necessary cost investment to ensure structural safety.