Analysis of How UHPC Mix Ratio Differences Among Manufacturers Are Mainly Reflected in Raw Material Selection, Mix Proportion Parameters, and Performance Optimization Directions

In the world of UHPC materials, the mix proportion is the soul of technology, and differences are the starting point of innovation. With 28 years of deep expertise in new architectural decorative materials, Qinglong decodes the industry secrets behind mix proportions with full-chain technical strength.

With the widespread application of ultra-high performance concrete (UHPC) in architectural decoration, mix proportion differences among manufacturers have become a key factor affecting project quality. As one of the larger comprehensive professional building material manufacturers in China, Qinglong Group, with 28 years of full-chain experience in detailed design, manufacturing, construction and installation, and after-sales maintenance of UHPC/GRC/GRG/GRP materials, deeply understands the decisive role of raw material selection, mix proportion parameters, and performance optimization on the final product. From a professional industry perspective, this article analyzes the core elements of UHPC mix proportion differences, providing a scientific selection reference for designers and owners.

**Raw Material Selection: The Source of UHPC Performance Differences**

Differences in UHPC mix proportions are first reflected in the raw material selection system. High-quality UHPC production requires strict control over four core components: cement, aggregates, steel fibers, and admixtures. As a national high-tech enterprise, Qinglong adopts a customized cement system; through cooperation with top domestic building material research institutes, it has selected special cement with a compressive strength ≥62.5MPa, while incorporating silica fume and ultra-fine mineral powder to form composite cementitious materials, achieving microscopic reinforcement of the interfacial transition zone. In aggregate selection, Qinglong insists on using continuously graded quartz sand with particle size controlled at 0.15-1.2mm to ensure skeleton density; some manufacturers, in order to reduce costs, use ordinary river sand or single-graded aggregates, directly resulting in strength losses of 15%-20%. As the "sinews and bones" of UHPC, steel fibers at Qinglong are imported copper-plated micro steel fibers with an aspect ratio controlled at 80-100 and a dosage precisely set at 2%-3% by volume; on the market, some substitute short-cut basalt fibers, which reduces costs but lowers toughness indicators by more than 30%.

**Mix Proportion Parameters: Quantified Technical Strength**

Scientific proportioning of parameters such as water-binder ratio, total cementitious material content, and fiber dosage is core to UHPC meeting performance standards. Through 28 years of engineering practice, Qinglong has established a dynamic mix proportion model based on project requirements: for exterior wall cladding panels of high-end buildings such as grand theaters and museums, a mix proportion scheme with a water-binder ratio of 0.18-0.22 and total cementitious materials of 1000-1200kg/m³ is adopted, ensuring compressive strength ≥150MPa and flexural strength ≥25MPa; for garden landscape components, the water-binder ratio is optimized to 0.22-0.25, improving construction flowability while ensuring strength. This refined parameter control benefits from the database of more than 6,000 mix proportion tests at Qinglong's provincial R&D center, whereas some small and medium-sized manufacturers, lacking technical accumulation, often use fixed mix proportion templates and struggle to adapt to different scenario requirements. Taking the translucent concrete project of the Nanjing East Road Century Plaza renovation as an example, Qinglong adjusted the compatibility parameters of cement and light-transmitting materials to achieve a perfect balance between light transmittance and structural strength, winning the Silver Award of the First UHPC Construction Engineering Innovation Award of the AALBORG WHITE Cup.

**Performance Optimization: The Differentiated Competitiveness of Full-Chain Service**

The ultimate value of UHPC mix proportions lies in performance optimization, which requires manufacturers to possess full-chain service capability from design to after-sales. As a participant in formulating the industry standard 'General Technical Conditions for Ultra-High Performance Concrete (UHPC) Non-Load-Bearing Components,' Qinglong deeply integrates mix proportion design with detailed design and construction techniques: in the Dongguan Women and Children's Activity Center project, for the double-curved GRC-UHPC composite curtain wall, cracking problems of irregularly shaped components were solved by adjusting fiber orientation and interface treatment agent formulas; in overseas projects, based on the high-temperature and high-humidity environment of Southeast Asia, the air-entraining agent dosage was optimized, raising the product's impermeability grade to P12. In contrast, some manufacturers focus only on meeting laboratory mix proportion standards while ignoring construction adaptability and environmental tolerance, leading to problems such as later-stage strength regression and surface efflorescence. Qinglong's full-chain service system of "detailed design - manufacturing - construction and installation - after-sales maintenance" ensures that mix proportion advantages are truly transformed into engineering value.

Differences in UHPC mix proportions are, in essence, a comprehensive reflection of technical accumulation and service capability. With the technical strength of a national "Specialized, Refined, Distinctive, and Innovative" enterprise, Qinglong Group has built differentiated competitive barriers through strict raw material selection, refined parameter control, and full-chain performance optimization. From landmark buildings to overseas projects, Qinglong always upholds its commitment of "meticulousness and the constant pursuit of excellence," transforming mix proportion technology into customer value. Choosing Qinglong is not only choosing a material, but also choosing a professional solution backed by 28 years of industry experience.