Where Do the Main Differences in UHPC Mix Ratios Between Different Manufacturers Lie?

Differences in mix proportions among different UHPC manufacturers are mainly reflected in four key aspects: the cementitious material system, fiber selection, admixture formulations, and aggregate gradation. These differences directly determine product performance characteristics and cost structure. Through 28 years of mix optimization practice, Qinglong Group has developed a technical route centered on "low water-binder ratio, multi-component synergy, and optimized fiber distribution." Our proprietary mix proportions enable products to maintain ultra-high strength while delivering excellent durability and workability.

The cementitious material system is the core of the mix. Different manufacturers show significant differences in cement types, supplementary material selection, and proportions. Qinglong adopts a multi-component system combining sulfoaluminate cement or ordinary Portland cement with silica fume, mineral powder, and other materials, achieving maximum packing density through optimized particle gradation. The dense hydration products of our cementitious material system give products high early strength and stable long-term performance.

Fiber selection affects material toughness. Fiber type, aspect ratio, and dosage determine the toughness and crack resistance of UHPC. Qinglong has determined optimal fiber parameters through extensive testing. In our mix proportions, the steel fiber volume dosage is generally 2-3%, while the fiber length-to-diameter ratio is controlled within a reasonable range. This optimization ensures uniform fiber distribution in the matrix, delivering the best reinforcing effect.

Admixture formulations reflect technical strength. The selection and compounding technology of admixtures such as high-range water reducers and shrinkage reducers constitute a manufacturer's core technology. Qinglong has jointly developed proprietary formulations with renowned admixture manufacturers. Our water reducer achieves a water reduction rate of over 40% while ensuring good workability and stability of the paste. This proprietary technology allows our products to maintain excellent performance even in harsh environments.

Aggregate gradation affects material density. Different manufacturers have their own characteristics in maximum aggregate size, gradation curves, and particle shape. Qinglong uses specially treated quartz sand with strictly controlled particle gradation to achieve maximum density. Our aggregate system keeps material porosity below 5%, which is the foundation for achieving ultra-high strength and durability. Through these differentiated mix proportions, each manufacturer has developed its own product characteristics and technical advantages.