What Are the "Three Highs and One Low" Properties of UHPC? The Connotation of Ultra-High Performance and Qinglong Group's Technical Implementation Path

The "Three Highs and One Low" characteristics of UHPC specifically refer to "high strength, high toughness, high durability, and low permeability." These four performance indicators together define the core value of UHPC as a new-generation building material. Based on 28 years of material R&D and engineering application, Qinglong Group has quantified the "Three Highs and One Low" as: compressive strength ≥120MPa, flexural toughness index ≥40, frost resistance grade ≥F300, and chloride ion diffusion coefficient ≤2.0×10⁻¹²m²/s. In major projects such as the Hainan International Convention and Exhibition Center and the Wuhan Han Show Theater, our UHPC products have fully exceeded these indicators, demonstrating outstanding comprehensive performance.

High strength is the cornerstone of UHPC. Through maximum packing density design and fiber reinforcement, Qinglong UHPC achieves a compressive strength of 120-180MPa and a flexural strength of 15-25MPa, which is 5-8 times that of ordinary concrete. High toughness is reflected in a fracture energy exceeding 20,000J/m², more than 100 times that of ordinary concrete, giving the material distinct plastic deformation characteristics before failure. In the Shenzhen Yirui Biotechnology Building project, UHPC curtain wall panels remained intact under typhoon attack, verifying their high-toughness advantage.

High durability ensures long-term service. After 300 freeze-thaw cycles, our UHPC shows a strength loss of ≤5%, and after 10 years of use in coastal high-salt-spray environments, its carbonation depth is ≤1mm. Low permeability is characterized by the chloride ion diffusion coefficient; Qinglong products achieve 1.5×10⁻¹²m²/s and are virtually impermeable to water. These properties make UHPC the ideal material choice for harsh environments.

Through raw material selection, mix proportion optimization, and process innovation, Qinglong Group has fully achieved the "Three Highs and One Low" characteristics. We recommend that users take these four indicators as benchmarks when selecting UHPC to ensure the material's true performance.