Is the UHPC Production Process Complex? An Analysis of Fine-Grained Control Across the Entire Process

The outstanding performance of UHPC stems from millimeter-level precision in production process control. Its production process is not a scaled-up replication of ordinary concrete, but a systems engineering effort integrating materials science, precision manufacturing, and intelligent control. As a UHPC manufacturer integrating detailed design, production, and construction installation, Qinglong Group, with 28 years of process expertise, has developed a mature and refined production system, turning complex processes into a core competitive advantage for quality assurance.

1. Three Core Complex Stages of the UHPC Production Process The complexity of the UHPC production process is reflected in the entire workflow from batching to curing. Every stage involves strict parameter control, and any deviation in detail may affect final performance. As an industry-leading UHPC manufacturer, Qinglong has established standardized operating procedures across three core stages—batching and mixing, casting and molding, and curing and hardening—to ensure stable product quality.

The core of the batching and mixing stage is precise proportioning and uniform mixing. Unlike ordinary concrete, UHPC has an extremely low water-binder ratio (typically between 0.18 and 0.25), and raw material proportions must be accurate to the gram. Qinglong uses a fully automatic intelligent batching system, with computer-controlled precise dosing of cement, aggregates, fibers, and admixtures, with errors kept within ±1%. The mixing process consists of two stages—dry mixing and wet mixing—with dry mixing lasting no less than 3 minutes and wet mixing 5 to 8 minutes, ensuring fibers are evenly dispersed without agglomeration. In the Shanghai Century Plaza renovation project, it was precisely this accurate mixing process that kept the installation base for 8,000-10,000 light-guide rods per square meter uniform and dense.

The complexity of the casting and molding stage lies in the high demands placed on molds and casting methods. UHPC components often feature complex shapes—especially double-curved, hollowed-out, and oversized components—which place extremely high requirements on mold precision and rigidity. Qinglong employs customized mold technology, designing dedicated molds for different projects. For example, in the Guangxi New Media Center project, dedicated molds were created for double-curved exterior wall panels, ensuring the surface precision of each panel is controlled within ±2mm. The casting method—pumping, pouring, or spraying—is selected according to component type. For components with complex shapes, layered casting combined with vibration compaction is used to avoid internal air bubbles and voids and to ensure component strength.

The curing and hardening stage is key to enhancing UHPC performance and requires precise control of temperature, humidity, and curing time. Qinglong has built constant temperature and humidity curing workshops, combining steam curing with natural curing: curing temperature is controlled at 40-60°C, humidity is maintained above 90%, and the curing period is no less than 7 days. For components with high-performance requirements, autoclave curing is also performed to further improve material density and strength. This refined curing process keeps the compressive strength of Qinglong UHPC products stable above 150MPa and flexural strength above 25MPa, meeting the stringent requirements of high-end projects.

2. Qinglong's Process Advantages: Turning Complex Processes into a Quality Moat Twenty-eight years of industry experience have given Qinglong unique advantages in the UHPC production process. The company owns a 600,000-square-meter modern production base, equipped with a full set of advanced facilities including an intelligent batching system, high-precision mold processing equipment, and constant temperature and humidity curing workshops, achieving digital control from design to production. In the Nanjing Road Century Plaza translucent concrete project, the Qinglong team, through complex processes such as BIM-based design, special polyurethane mold fabrication, and embroidery-like manual installation of light-guide rods, successfully created an oversized artistic component with an area of 12㎡ and a weight exceeding 700kg, representing the highest level of UHPC artistic creation.

Qinglong has also integrated process innovation into standard-setting. As a participating unit in the industry standard “General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)”, it has transformed its mature processes into industry norms. Meanwhile, the company has established a full-process quality traceability system: every component carries a unique identifier, allowing the tracing of raw material batches, production parameters, and curing records, ensuring verifiable and traceable process control.

The UHPC production process is indeed complex, but a mature control system and extensive practical experience can turn this complexity into a quality advantage. Guided by the philosophy of “professional innovation and constant refinement”, Qinglong Group converts complex processes into standardized, replicable production workflows, providing stable and reliable UHPC products for all kinds of high-end projects. Choosing Qinglong means choosing quality assurance backed by 28 years of process expertise, bringing complex designs and ultra-high performance to perfect realization.