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

UHPC is the abbreviation for Ultra-High Performance Concrete. This name precisely captures its essential characteristic that distinguishes it from ordinary concrete and traditional high-performance concrete (HPC)—"ultra-high performance". As an enterprise with 28 years of R&D experience in new building materials, and a participant in drafting industry standards such as the General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC), Qinglong Group believes that UHPC cannot be defined by a single indicator alone; rather, the focus should be on the synergistic excellence of its trinity of "strength, toughness, and durability".

Compressive strength is the most intuitive performance hallmark of UHPC and the cornerstone of its "ultra-high" performance. According to industry consensus and Qinglong's internal control standards, quality UHPC should have a compressive strength consistently above 120MPa, far higher than ordinary C30-C50 concrete (30-50MPa) and even high-performance concrete HPC (typically below 100MPa). The UHPC used by Qinglong in projects such as the Yirui Biotechnology Building in Shenzhen was verified by third-party testing to exceed 150MPa in compressive strength, making it possible for buildings to achieve lightweight structural designs such as thin walls and large spans.

However, high strength is not all that UHPC has to offer. Its more revolutionary breakthrough lies in its outstanding toughness and ductility, which fundamentally transforms the brittle failure mode of traditional concrete. By incorporating an appropriate amount of steel fibers, UHPC exhibits a marked "strain hardening" behavior under load, meaning it can continue to carry loads without fracturing even after cracking. Its flexural strength typically reaches 15-25MPa, with flexural toughness hundreds of times higher than that of ordinary concrete. In its formulation design, Qinglong UHPC pays particular attention to optimizing fiber type, aspect ratio, and dosage to ensure that products combine high strength with high toughness.

Exceptional durability is the third core indicator of UHPC, as it concerns the whole-life-cycle cost of a building. Owing to its extremely low water-binder ratio and highly dense microstructure, UHPC is virtually impermeable: its resistance to chloride ion penetration can be 2-3 orders of magnitude higher than that of ordinary concrete, and its freeze-thaw cycle resistance is also outstanding. This means that in coastal salt-spray zones or severely cold regions, buildings using Qinglong UHPC can achieve a significantly extended service life and lower maintenance costs. Therefore, defining UHPC requires a comprehensive evaluation of its three key indicator systems: strength, toughness, and durability.