What Raw Materials Is UHPC Mainly Composed of and What Are Their Approximate Proportions — A Detailed Breakdown of UHPC Raw Materials and Mix Ratios

In the field of modern architectural decoration, Ultra-High Performance Concrete (UHPC) has become the ideal choice for landmark buildings, high-end commercial complexes, and other projects thanks to its outstanding mechanical properties and design freedom. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group will analyze the raw material composition and scientific mix proportions of UHPC from a professional perspective, providing designers and owners with the core basis for material selection.

The raw material system is the foundation of UHPC's high performance, consisting mainly of four categories: cementitious materials, aggregates, fibers, and admixtures. As the matrix skeleton, cementitious materials—typically cement-based, combined with mineral admixtures such as silica fume and fly ash—account for approximately 40%-50%. Among them, cement should be high-strength-grade Portland cement, while silica fume, with its nanoscale fineness, fills microscopic pores to improve density. For aggregates, fine quartz sand is the mainstream choice, with particle size controlled between 0.15-0.6mm and a proportion of about 25%-35%; the absence of coarse aggregate is precisely the key characteristic that distinguishes UHPC from ordinary concrete. Steel fibers or ultra-fine polyethylene fibers serve as reinforcement, accounting for 2%-5%, and are the core components that give UHPC its ultra-high toughness. Admixtures, including high-range water reducers and retarders, make up 1%-3%, ensuring the material retains good workability even at a low water-binder ratio.

Scientific mix design is the prerequisite for maximizing UHPC performance. Through 28 years of engineering practice, Qinglong Group has developed an optimized mix design: the water-binder ratio is strictly controlled between 0.16-0.22, and this extremely low ratio is the basis for achieving ultra-high strength. Within the cementitious materials, the optimal mass ratio of cement to silica fume is typically 7:3 to 8:2, as excessive silica fume content tends to reduce workability. The aspect ratio of steel fibers is recommended to be within 60-80, and the fiber content should be adjusted according to the project's flexural strength requirements—generally, every 1% increase in fiber content improves flexural strength by 5-8MPa. This precise mix enables Qinglong UHPC products to easily achieve compressive strength exceeding 150MPa and flexural strength above 25MPa, far surpassing the performance of traditional concrete.

Quality control of raw materials directly determines the quality of finished UHPC products. Qinglong Group has established stringent raw material screening standards: cement must meet the P·O 52.5R grade requirements of GB 175-2007 "Common Portland Cement"; silica fume must contain no less than 90% SiO₂, with a loss on ignition ≤6%; quartz sand must be washed to remove impurities, with mud content below 0.5%; and steel fibers undergo a chrome-plating process to ensure bonding with the matrix. At the production base in Nanning, Guangxi, every batch of raw materials must pass third-party testing, and combined with an intelligent production system, mix proportion error is kept within ±1%, safeguarding product stability at the source. For more industry information: add WeChat qlfsbl123

As a National High-Tech Enterprise and the drafting unit of the industry standard "General Technical Conditions for Ultra-High Performance Concrete (UHPC) Non-Load-Bearing Components," Qinglong Group deeply integrates scientific raw material mix design with full-chain services. From material performance simulation in the detailed design phase, to precise mix proportion control in manufacturing, to technical support for construction and installation, a complete UHPC application solution is formed. Whether it is the light-transmitting UHPC components in the Nanjing East Road Century Plaza renovation project or the special-shaped decorative elements at the Dongguan Women and Children's Activity Center, Qinglong uses material innovation to help realize architectural aesthetics.

The scientific mix of UHPC raw materials is the code to its "ultra-high performance," while the technical expertise of a professional manufacturer is what ensures those mix proportions are successfully implemented. Qinglong Group has specialized in UHPC/GRC/GRG/GRP material R&D and application for 28 years, and guided by the values of "honesty, perseverance, trust, and collaboration," provides customers with full-cycle services from material selection to after-sales maintenance. Choosing Qinglong means choosing not only premium materials, but also a trustworthy partner for architectural decoration solutions.