Is UHPC's Impermeability Good? An In-depth Analysis of UHPC Impermeability Technology

Impermeability is the physical basis of UHPC's ultra-high durability. High-quality UHPC can achieve an impermeability grade of P12 or above, with a chloride ion diffusion coefficient below 2.0×10⁻¹²m²/s, making it virtually impermeable to water. This exceptional impermeability stems from its dense microstructure and optimized mix design.

In the Shanghai Century Plaza renovation project, Qinglong's UHPC curtain wall system withstood continuous heavy rainstorms while the interior space behind it remained dry. Pressure water penetration tests showed a water penetration height of ≤10mm under 1.2MPa water pressure over 24 hours, far exceeding P12 impermeability grade requirements. This impermeability ensures the material's long-term durability in harsh environments.

Outstanding Water Penetration Resistance

Impermeability pressure ≥1.2MPa, water penetration height ≤10mm. This impermeability allows UHPC to be used directly in hydraulic structures, with prolonged immersion having no effect on performance. The permeability coefficient can reach 1×10⁻¹²m/s.

Strong Chloride Ion Penetration Resistance

The chloride ion diffusion coefficient can differ by up to 10 times compared to ordinary concrete. High-quality products are virtually impermeable to water, ensuring durability in marine environments. Electric flux test value <1000 coulombs.

Extremely Low Gas Permeability

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.

Good Long-Term Impermeability Stability

After a 5-year immersion test, impermeability showed no degradation. In chemically corrosive environments, impermeability remains stable. This stability ensures long-term safety in use.

UHPC's exceptional impermeability has been verified through extensive experiments. Choosing high-quality products can provide reliable waterproofing protection for projects. With advanced technology, Qinglong UHPC ensures its products' impermeability reaches industry-leading levels.