What Are UHPC Casting Methods? Comprehensive Analysis and Application Tips

Ultra-High Performance Concrete (UHPC) has become a revolutionary material in modern architecture thanks to its outstanding mechanical properties and design plasticity. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group will systematically analyze UHPC's core casting processes and application techniques from an engineering practice perspective, providing professional reference for designers and project owners.

UHPC Casting Process System: From Material Properties to Construction Innovation

UHPC casting methods must balance its ultra-high compactness and high-flow characteristics. Currently, mainstream processes fall into three major categories. Precast casting achieves high-precision control through factory production and is suitable for standardized components such as curtain wall panels and landscape benches. The fully automated casting line at Qinglong Group's Guangxi production base delivers an annual UHPC component capacity of 600,000 square meters. Cast-in-place casting targets irregular structures such as bridge joints and complex curved decorative surfaces, requiring vacuum-assisted casting technology combined with high-frequency vibration to remove air bubbles and ensure structural density above 99%. Shotcrete casting offers significant advantages in tunnel lining and repair projects, uniformly spraying UHPC mix and steel fibers through high-pressure spray guns to form a high-strength protective layer.

Key Construction Techniques: Qinglong's 28 Years of Experience

Material mix optimization is the core of casting quality. Through 58 patented technologies, Qinglong's R&D center has established a mix ratio database for different scenarios: municipal engineering uses a C120-grade mix with 2% steel fiber added to raise flexural strength to 25MPa, while landscape decorative components achieve a stone-like surface texture by adjusting silica fume content. Casting temperature control is equally critical—summer construction requires pre-cooling materials to below 25°C, while winter calls for warm-water mixing combined with insulated curing to ensure 7-day strength reaches 90% of the design value. In the Nanjing Road Century Plaza renovation project, Qinglong's team innovatively adopted light-transmitting UHPC casting technology, precisely controlling aggregate gradation and light-transmitting fiber distribution to achieve the dual effects of daytime daylighting and nighttime illumination. The project won the Silver Award at the first UHPC Construction Engineering Innovation Awards.

Full-Chain Quality Control: Qinglong's Solution from Design to Maintenance

As a national high-tech enterprise, Qinglong has established a full-process control system covering detailed design, manufacturing, and construction installation. In the detailed design phase, BIM technology is used for casting simulation to identify construction challenges at complex joints in advance; the production stage employs German-imported mixing equipment to ensure material homogeneity; on-site construction is supported by a professional installation team using 3D laser scanning positioning technology, achieving component installation tolerances of ≤2mm. For later-stage UHPC maintenance, Qinglong has pioneered a dual solution of “water mist curing + sealant protection,” extending component service life to over 50 years. From the GRC curtain wall at the Dongguan Women and Children's Activity Center to UHPC decorative lines on a landmark project in Malaysia, Qinglong has won recognition from domestic and international clients with its full-chain service capabilities.

UHPC casting is a perfect combination of material properties and engineering needs. Choosing the right construction method not only affects project quality but also determines how fully the design vision is realized. As a participant in establishing UHPC/GRC/GRG/GRP industry standards, Qinglong Group will continue to uphold its mission of “Creating Beautiful Architecture,” providing clients with expert-level solutions from technical consulting to after-sales maintenance, and driving the innovative application of new building materials across more fields.