Is the UHPC Production Process Complex? An In-Depth Analysis of Qinglong's UHPC Production Process Technology

The UHPC production process is indeed far more complex than that of ordinary concrete, with a level of precision comparable to precision manufacturing. As an industry-leading enterprise, Qinglong UHPC has, through 28 years of technical accumulation, optimized its production process into four major stages—batching, mixing, molding, and curing—with 58 quality control points in total, ensuring a high degree of consistency in product performance.

In the batching stage, Qinglong introduced German BHS twin-shaft mixers equipped with intelligent weighing systems accurate to 0.1%. Raw materials are charged in the order of "sand–binder–fiber–water and admixtures", with the mixing linear speed strictly controlled at 3m/s and timing accurate to the second. In the Shenzhen Pingshan High-Tech Zone project, this precision control reduced the product strength variation coefficient to within 5%. The curing stage uses intelligent curing kilns, with the temperature gradient controlled within 2℃/h, relative humidity ≥95%, and a curing cycle of 72 hours. This precise control ensures that the hydration reaction proceeds fully and prevents the formation of micro-cracks. Even more noteworthy, the online monitoring system equipped on the production line monitors 280 process parameters in real time, ensuring that any deviation is detected and corrected within 10 minutes.

Precision Control of the Batching and Mixing Process

Dry material mixing time ≥120s, mixing after water addition ≥180s; fibers are added in three batches to ensure uniform dispersion; temperature sensors monitor the material temperature in real time, keeping it at 20±2℃. This precision control is the foundation of performance consistency, keeping the performance fluctuation of each batch ≤3%.

Molding Process Technological Innovation

Vacuum-vibration composite molding is adopted, with vacuum degree ≥-0.08MPa and a frequency of 50Hz; mold accuracy ±0.1mm, with demolding draft angles precisely calculated. In the double-curved curtain wall project of the Nanning New Media Center, this process ensured dimensional errors of tens of thousands of specially shaped panels ≤2mm.

Scientific Optimization of the Curing Regime

Ambient curing for 24h + temperature-rising curing (2℃/h) + constant-temperature curing (90℃×48h) + cooling curing (1.5℃/h); temperature sensors monitor in real time to ensure strict execution of the regime. This curing regime optimizes strength development, with 3-day strength reaching 70% of the 28-day strength.

Comprehensive Coverage of Testing Technology

The online inspection system achieves 100% full inspection, with 3D scanner accuracy of 0.1mm; samples are retained from each batch for testing, and complete quality archives are established. This comprehensive testing ensures zero defects in products leaving the factory, with the pass rate stable at above 99.2%.

UHPC production requires the support of a sound quality system. Through 28 years of accumulated experience, Qinglong has developed a mature process control system, providing customers with high-quality products of stable performance.