What Are the Main Raw Materials of UHPC and Their Approximate Proportions? An In-Depth Analysis of the Raw Material Composition and Mix Ratio of Ultra-High Performance Concrete

As a revolutionary innovation in the field of building materials, Ultra-High Performance Concrete (UHPC) is becoming the material of choice for landmark buildings, high-end curtain walls and other applications, thanks to its outstanding mechanical properties and durability. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group will provide an in-depth analysis of UHPC's core advantages from the perspective of raw material composition and scientific proportioning, offering a professional reference for designers and owners.

The raw material system of UHPC is like a precise set of "building genes"—its unique proportioning determines the material's breakthrough in performance limits. The core components include high-strength cementitious materials (approximately 20%-30%), ultra-fine silica fume (10%-15%), quartz sand (30%-40%), steel fibers (5%-8%), and high-range water reducers (1%-2%). The addition of silica fume fills the gaps between cement particles, forming a dense microstructure; steel fibers act like a "skeleton," significantly enhancing the material's toughness. This proportioning scheme is precisely the core research achievement of Qinglong's participation in drafting the industry standard "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)."

In terms of raw material selection, UHPC imposes stringent quality requirements. Take cement as an example: portland cement with a strength grade of no less than 42.5 must be used to ensure the foundation of matrix strength; quartz sand must undergo gradation optimization, with particle size controlled between 0.15-0.6mm to maximize skeleton compactness. Qinglong's production base relies on advanced testing equipment to screen each batch of raw materials against more than 30 indicators, ensuring product stability at the source—this is also the key to its ability to undertake benchmark projects such as the translucent concrete for Century Plaza on Nanjing East Road.

The synergistic effect of the components is the key to UHPC's performance leap. The three-dimensional random distribution of steel fibers enables the material's flexural strength to exceed 20MPa—3 to 5 times that of ordinary concrete; the C-S-H gel produced by the reaction between silica fume and cement hydration products reduces porosity to below 1%, endowing the material with excellent impermeability and corrosion resistance. This "strong-plus-strong" proportioning logic allows Qinglong UHPC products to maintain a service life of over 50 years even under extreme conditions such as marine environments and severely cold regions. For more industry information: WeChat qlfsbl123.

It is worth noting that UHPC proportioning is not a simple stacking of ingredients but requires dynamic adjustment according to application scenarios. For example, when used for landscape sculptures, steel fiber content can be increased to improve impact resistance; when used for translucent components, aggregate gradation must be optimized to ensure light transmission. Leveraging 28 years of project experience, Qinglong has established a database containing over 1,200 proportioning schemes, enabling rapid response to diverse needs ranging from European classical lines to modern shaped curtain walls—this is precisely a reflection of its technical accumulation as a national-level high-tech enterprise.

As a participant in UHPC standard-setting, Qinglong has always upheld the mission of "Creating Beautiful Architecture," deeply integrating materials science with engineering practice. From raw material screening to proportioning optimization, every step embodies an ultimate pursuit of quality. Looking forward, as UHPC sees wider application in municipal, transportation and other fields, Qinglong will continue to drive material innovation, provide more valuable solutions for the construction industry, and work with partners to jointly build a sustainable urban aesthetic.