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

UHPC stands for Ultra-High Performance Concrete, a new type of building material featuring ultra-high strength, high durability, and high toughness. Its core definition is established through multiple key indicators, which directly determine material performance and application scenarios, serving as the core basis for product selection and quality control.

I. Key Indicator System for UHPC's Core Definition

The key indicators of UHPC mainly cover three dimensions: mechanical performance, durability, and microstructure. In terms of mechanical performance, the standard value of cube compressive strength is ≥120MPa, with premium products reaching 150-180MPa; Qinglong UHPC products generally achieve measured compressive strength above 150MPa; flexural strength is ≥20MPa and fracture energy is ≥2000J/m², far exceeding ordinary concrete and GRC materials. Among the durability indicators, freeze-thaw cycle resistance is ≥300 cycles, mass loss rate ≤1%, and strength loss rate ≤5%; the chloride ion penetration coefficient is ≤1×10⁻¹²m/s, providing excellent corrosion resistance. The microstructure indicator requires porosity ≤1%, with a dense internal structure safeguarding strength and durability; through precise proportioning and curing processes, Qinglong keeps product porosity below 0.8%.

II. Technical Logic Behind the Indicators and Industry Standards

These key indicators derive from UHPC's material composition and preparation process, whose core lies in achieving performance breakthroughs through optimized particle grading, active admixtures, and fiber reinforcement. The industry standard "Ultra-High Performance Concrete (UHPC) Exterior Wall Panels" (T/CBMF171-2022) explicitly specifies the indicator requirements for UHPC. As a participating unit in drafting this standard, Qinglong strictly follows it in production to ensure products meet requirements. Taking compressive strength as an example, high-grade cement, quartz sand, and active admixtures such as silica fume are selected, combined with steel fiber reinforcement, to densify the material's internal structure and greatly enhance strength; chloride ion penetration resistance is achieved by lowering the water-binder ratio (usually ≤0.25) and optimizing curing, ensuring service life in harsh environments.

III. How Key Indicators Match Application Scenarios

Different application scenarios impose different indicator requirements on UHPC. In architectural decoration fields such as curtain wall panels and sculptures, flexural strength and surface texture deserve key attention; in Qinglong's Shanghai Astronomy Museum public art project, UHPC sculptures achieved a flexural strength of 25MPa, perfectly supporting complex forms over 3 meters in height. Bridge engineering prioritizes compressive strength and freeze-thaw resistance to ensure structural safety and long-term stability; coastal projects require enhanced chloride ion penetration resistance—in Qinglong's Ouargla Hotel project in Algeria, corrosion resistance indicators were optimized to suit the demands of high-salt-spray environments. Meeting these indicators is the foundation of project safety and a direct reflection of a manufacturer's technical strength.

IV. Qinglong's UHPC Indicator Control and Practical Achievements

Qinglong has established a full-process indicator control system, with every stage from raw material screening to finished product testing centered on key indicators. For raw materials, cement of grade 42.5 or above, high-purity quartz sand, and imported steel fibers are selected to secure the foundation of mechanical performance; during production, automated metering and mixing equipment controls the water-binder ratio and fiber content to ensure indicator stability; at the finished product stage, indicators such as compressive strength and freeze-thaw resistance are tested at the provincial-level R&D center, and non-conforming products are strictly barred from leaving the factory. Relying on such rigorous control, Qinglong UHPC products far exceed industry standards in all indicators, and have been successfully applied in major projects such as the Nanjing Road Century Plaza in Shanghai and the Yangshengtang Pharmaceutical Hangzhou Industrial Park, earning high recognition from clients.