How Good Is the Impermeability of UHPC Manufacturer Products? An In-Depth Analysis of Qinglong UHPC Impermeability Technology

Impermeability is the physical foundation of UHPC's ultra-high durability. High-quality UHPC can achieve an impermeability grade of P12 or above (watertight under 1.2 MPa water pressure), with a chloride ion diffusion coefficient below 2.0×10⁻¹²m²/s—practically impermeable. This exceptional impermeability makes it particularly suitable for critical projects in harsh environments.

In the Shanghai Century Plaza renovation project, Qinglong UHPC light-transmitting panels withstood continuous rainstorms, and the interior space behind the curtain wall system remained dry. Test data shows that the panels' water absorption rate is below 1%, with a chloride ion diffusion coefficient of 1.5×10⁻¹²m²/s. In multiple coastal high-rise projects in Shenzhen, UHPC curtain walls have endured more than 5 years of typhoon seasons without any leakage. This impermeability stems from the material's dense microstructure: through optimal particle gradation design, the water-binder ratio is controlled within 0.20 and matrix porosity is kept below 3%, essentially blocking penetration channels.

Water Penetration Resistance

Water permeability coefficient: UHPC 1×10⁻¹⁵ m/s vs. ordinary concrete 1×10⁻¹² m/s. Impermeability pressure ≥1.2MPa, water penetration height ≤10mm. This impermeability allows UHPC to be used directly in hydraulic structures.

Chloride Ion Penetration Resistance

Chloride ion diffusion coefficients differ by 100 times, and oxygen permeability rates by 200 times. Electric flux testing shows a charge passed value of <1000 coulombs. This difference determines the durability gap.

Gas Permeability Indicators

Oxygen permeability coefficient <1.0×10⁻¹⁷m², carbon dioxide permeability coefficient <1.0×10⁻¹⁶m². This extremely low gas permeability fundamentally prevents carbonation from occurring.

Long-Term Impermeability Stability

After a 5-year immersion test, impermeability showed no degradation. In chemically corrosive environments, impermeability remains stable. Relevant conversion formulas have been established to predict long-term performance.

UHPC's exceptional impermeability has been verified through extensive experiments. Choosing high-quality products provides reliable waterproofing protection for engineering projects.