What Is the Full Name of UHPC and What Are the Key Indicators in Its Core Definition?

UHPC stands for Ultra-High Performance Concrete. Its core definition centers on "ultra-high performance," with key indicators covering strength, durability, compactness, and other dimensions. As a company that participated in formulating industry standards, Qinglong's product indicators have always been benchmarked against advanced international levels.

I. UHPC Full Name and Core Definition Explained

UHPC is a new type of building material that achieves performance far exceeding ordinary concrete through optimized particle gradation and the incorporation of high-performance fibers and admixtures. The core definition emphasizes "comprehensive ultra-high performance" rather than leadership in a single indicator, requiring both mechanical properties that break through conventional limits and long-term stable performance in use. The General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC), in whose formulation Qinglong participated, explicitly defines it as "a special concrete based on a low water-binder ratio and high compactness, combining high strength, high durability, and high workability."

II. Key Technical Indicators of the Core Definition

Key indicators fall into three major categories—mechanical properties, durability, and workability—together constituting the core value of UHPC. Mechanical properties: cube compressive strength ≥120MPa, axial compressive strength ≥100MPa, flexural strength ≥15MPa; Qinglong's mass-produced UHPC generally reaches a compressive strength of 150-180MPa, and components for the Shanghai Astronomy Museum public art project achieve a flexural strength of 22MPa. Durability: freeze-thaw cycle resistance ≥300 cycles with strength loss ≤5%, chloride ion penetration coefficient ≤1.0×10⁻¹²m²/s, and nearly zero carbonation depth; components from Qinglong's Ouargla hotel project in Algeria have shown no corrosion after 5 years in a high-salt-spray environment. Workability: freshly mixed UHPC achieves a spread ≥750mm and self-compacts without vibration, making it suitable for pouring complex shapes; in Qinglong's production of double-curved components, flowability meets mold filling requirements.

III. Technical Support Behind the Indicators and Corporate Practice

Achieving these key indicators relies on the dual assurance of technology and processes. At the raw material level: low-alkali cement, ultra-fine silica fume, and high-purity quartz sand are selected, paired with alkali-resistant glass fibers or steel fibers; Qinglong has achieved synergistic enhancement of raw materials through the optimization of 58 patented formulations. At the process level: automated batching, forced mixing, and constant-temperature, constant-humidity curing ensure indicator stability; the intelligent curing system at Qinglong's production base in Nanning, Guangxi keeps product strength fluctuation within 3%. At the standards level: strict adherence to national and industry standards; the multiple UHPC standards Qinglong participated in formulating set the benchmark for industry indicators, and its product test reports cover all key indicators, satisfying the review requirements of major projects.