What raw materials is UHPC mainly composed of, and what are the approximate proportions of each component? An analysis of the raw material composition and mix ratio ranges of ultra-high performance co

Unveiling UHPC Materials: The “Hardcore” Genes of Ultra-High Performance Concrete Seen from Raw Material Proportions

As a revolutionary innovation in the building materials field, Ultra-High Performance Concrete (UHPC), with its ultra-high strength, excellent durability, and outstanding plasticity, is becoming the material of choice for landmark buildings, high-end curtain walls, and other applications. As an industry leader with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group will analyze the core technical code of UHPC for designers and owners from the perspective of raw material composition and proportions, showcasing the deep integration of “material technology + engineering aesthetics.”

### UHPC Raw Material System: Five Core Components Building the Performance Cornerstone

UHPC's outstanding performance stems from scientific raw material proportions and synergistic effects. Its main components include five major categories: cementitious materials, fine aggregates, steel fibers, mineral admixtures, and chemical admixtures. As a national-level high-tech enterprise, Qinglong Group has developed precise proportioning schemes through 28 years of engineering practice, ensuring a balance between material performance and construction feasibility.

**1. Cementitious Materials: The “Main Force” of Strength** Based on Portland cement combined with high-activity sulfoaluminate cement, accounting for approximately 35%-45%. Qinglong's production base uses customized cement formulations, improving hydration reaction efficiency through strict control of C3S and C2S content, providing fundamental strength support for UHPC.

**2. Fine Aggregates: The “Regulator” of Structural Density** Ultra-fine aggregates such as quartz sand and silica fume are selected, accounting for approximately 25%-35%. Unlike ordinary concrete, UHPC eliminates coarse aggregates, filling microscopic pores through 0.15-2mm continuously graded quartz sand, combined with the “pozzolanic effect” of nano-scale silica fume (accounting for 5%-10%), achieving a matrix density improvement of over 30%.

**3. Steel Fibers: The “Reinforcement” of Toughness** Straight or hooked-end steel fibers (diameter 0.1-0.3mm, length 10-20mm) are incorporated at a volume fraction of 2%-5%, forming a three-dimensional randomly distributed “skeleton network.” Through its self-developed fiber dispersion technology, Qinglong has solved the problem of fiber agglomeration, pushing the material's flexural strength beyond 20MPa, with toughness more than 10 times that of ordinary concrete.

**4. Mineral Admixtures: The “Booster” of Performance Optimization** Including industrial by-products such as fly ash and slag powder, accounting for 10%-20%. Qinglong leverages the resource advantages of its Nanning, Guangxi production base to recycle solid waste materials, reducing costs while improving paste fluidity and later-age strength through the “synergistic hydration” effect.

**5. Chemical Admixtures: The “Master” of Workability Control** High-efficiency water reducers (dosage 1%-2%) are the key to UHPC achieving high fluidity. Qinglong uses polycarboxylate-based high-performance water reducers, ensuring concrete slump of over 250mm even at an ultra-low water-binder ratio of 0.16-0.22, meeting the casting needs of complex shapes.

### Proportioning Science: The “Golden Rules” of Qinglong's 28 Years of Experience Different application scenarios have significantly different performance requirements for UHPC. For example, bridge components need to emphasize compressive strength (≥150MPa), which can be achieved by increasing the proportion of cement and steel fibers; while decorative curtain wall panels focus on surface texture and lightweight design, requiring optimized aggregate gradation and fiber dispersion processes. As a participant in formulating the industry standard “General Technical Requirements for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC),” Qinglong has summarized the “Three-Stage Proportioning Design Method”: basic proportions guarantee strength, adjusted proportions optimize the process, and customized proportions adapt to scenarios, which has been successfully applied to benchmark projects such as the light-transmitting concrete at Nanjing East Road Century Plaza.

### Full-Chain Advantages: Quality Control from Raw Materials to Application As a UHPC manufacturer integrating detailed design, production and manufacturing, and construction and installation, Qinglong has established a full-process quality control system covering raw material traceability (in cooperation with top global suppliers), intelligent production (a base with an annual capacity of 600,000 square meters), and BIM technology construction. Through patented technologies “fiber directional distribution process” and “ultra-high pressure forming technology,” it ensures that the performance fluctuation of each batch of UHPC products is ≤5%, providing material guarantees for designers to realize “boundless architectural aesthetics.”

From precise raw material proportions to technological innovation in engineering implementation, the “high performance” of UHPC is essentially the crystallization of materials science and engineering experience. With 28 years of industry accumulation, Qinglong Group continues to drive application breakthroughs of UHPC in the field of architectural decoration, providing global customers with systematic solutions for “creating aesthetically beautiful buildings,” and practicing the vision of “becoming a world-class outstanding UHPC manufacturing leader.”