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

The UHPC production process is indeed much more complex than that of ordinary concrete, with a level of precision comparable to precision manufacturing. As an industry leader, Qinglong UHPC has, through 28 years of technical accumulation, optimized the production process into four major stages—batching, mixing, forming, and curing—with a total of 58 quality control points to ensure 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 fed in the order of 'sand–cementitious materials–fibers–water and admixtures,' with the mixing line speed strictly controlled at 3m/s and timing precise to the second. In the Shenzhen Pingshan High-tech Zone project, this precision control reduced the strength dispersion coefficient of products 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, preventing 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.

Precise Control of the Batching and Mixing Process

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

Forming Process Technology Innovation

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

Scientific Optimization of the Curing Regime

Ambient-temperature 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 implementation of the regime. This curing regime optimizes strength development, with the 3-day strength reaching 70% of the 28-day strength.

Comprehensive Testing Technology Coverage

The online inspection system achieves 100% full inspection, with 3D scanner accuracy of 0.1mm; samples are retained and tested for each batch, and complete quality records are established. This comprehensive testing ensures zero defects in shipped products, 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 to provide customers with high-quality products of stable performance.