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 (impermeable under 1.2MPa water pressure), with a chloride ion diffusion coefficient below 2.0×10⁻¹²m²/s, making it virtually impervious to water. This exceptional impermeability makes it particularly suitable for critical projects in harsh environments.

In the Shanghai Century Plaza renovation project, Qinglong UHPC translucent panels withstood continuous heavy rainstorms, and the indoor space behind the curtain wall system remained dry. Test data show that the panels have a water absorption rate below 1% and a chloride ion diffusion coefficient of 1.5×10⁻¹²m²/s. In multiple coastal high-rise projects in Shenzhen, UHPC curtain walls have withstood 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%, fundamentally blocking penetration channels.

Water Penetration Resistance

Water permeability coefficient: UHPC 1×10⁻¹⁵ m/s, 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

The chloride ion diffusion coefficient differs by a factor of 100, and oxygen permeability by a factor of 200. Electric flux testing shows a charge passed value <1000 coulombs. This difference determines the gap in durability.

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 outstanding impermeability has been verified through extensive experiments. Choosing high-quality products provides reliable waterproofing protection for projects.