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

A precise understanding of materials is the foundation for practical application. As a core category of new architectural decoration materials, UHPC's full name and clearly defined core indicators directly determine the scientific soundness of project material selection. As an industry leader with 28 years of dedicated expertise, Qinglong Group provides an authoritative interpretation for the industry, drawing on its experience in participating in the formulation of industry standards.

The full name of UHPC is Ultra-High Performance Concrete, a new composite material designed based on close-packing theory. Compared with ordinary concrete, its core definition is not merely about strength improvement, but a comprehensive breakthrough across multiple performance dimensions. This understanding is clearly defined in the "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)", for which Qinglong participated in the formulation. Core indicators must satisfy four dimensions: mechanical properties, durability, workability, and compactness. Missing any one of these dimensions means the material does not meet the strict definition of UHPC.

Mechanical properties are the core identifying indicator of UHPC. According to industry standards, the minimum cube compressive strength is ≥120MPa and the flexural strength is ≥25MPa, far exceeding the performance of ordinary C80 concrete. Through optimized mix proportions and fiber reinforcement technology, Qinglong Group's UHPC products achieve a compressive strength of over 150MPa and a flexural strength exceeding 30MPa. In the Shanghai Astronomy Museum's public art sculpture project featuring pieces over 3 meters tall, they perfectly bear self-weight and environmental loads, verifying the reliability of their mechanical properties. In addition, a toughness indicator with fracture energy ≥20kJ/m² distinguishes it from the brittle characteristics of ordinary concrete, giving it stronger impact resistance.

High durability is the core advantage indicator of UHPC. It must satisfy ≥200 freeze-thaw cycles (with a strength loss rate ≤10%), a carbonation depth ≤5mm, and a chloride ion permeability coefficient ≤1×10⁻¹²m²/s. Through high-quality aggregates and a low water-binder ratio design, Qinglong's UHPC products delivered in the Panzhihua Third-Front Construction Cultural Tourism Project a service commitment of over 20 years without strength degradation or cracking, and demonstrated outstanding corrosion resistance in the high-salt-spray environment project in Hainan. This indicator directly determines the material's full life-cycle cost and is a key consideration for material selection in public buildings and outdoor projects.

Workability and compactness are the foundational indicators for achieving performance. Workability is measured against a standard spread of ≥200mm, ensuring the material can adapt to the casting of complex shapes. Qinglong uses polycarboxylate-based superplasticizers, enabling UHPC to achieve smooth forming and precise light-guide rod embedding in the production of the 12m² super-large components for Century Plaza on Nanjing East Road in Shanghai. In terms of compactness, a porosity of ≤1% is the core requirement. Through a close-packing design of cementitious materials and aggregates, Qinglong's UHPC products have a dense internal structure, providing structural support for high strength and high durability, with impermeability far exceeding that of ordinary concrete.

The full name and core indicators of UHPC constitute the core of its technical value. As a participant in formulating industry standards, Qinglong Group transforms these indicators into practical application value through continuous optimization of product performance and project verification. Understanding these key indicators helps customers make precise material selections and avoid being misled by "pseudo-UHPC" products. Adhering to the principle of "meticulousness and the pursuit of excellence", Qinglong ensures that every batch of products meets the core indicator requirements, providing long-term reliable material support for construction projects.