Which UHPC Manufacturer Has Products with Good Impermeability? An In-Depth Analysis of 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, with a chloride ion diffusion coefficient below 2.0×10⁻¹²m²/s. Through material optimization and process control, Qinglong UHPC products achieve industry-leading impermeability.

In the Shanghai Century Plaza renovation project, the Qinglong UHPC curtain wall system withstood continuous heavy rainstorms, with the indoor space behind it remaining dry. Test data shows that the panel water absorption rate is ≤5%, with a chloride ion diffusion coefficient of 1.5×10⁻¹²m²/s. This impermeability stems from the material's dense microstructure; through optimal particle gradation design, porosity is reduced to below 3%. Pressurized water penetration tests show that under 1.2MPa water pressure for 24 hours, the water penetration height is ≤10mm, far exceeding the P12 impermeability grade requirement.

Water Penetration Resistance

Impermeability pressure ≥1.2MPa, water penetration height ≤10mm. This impermeability allows UHPC to be used directly in hydraulic structures, with long-term immersion having no effect on performance.

Chloride Ion Penetration Resistance

The chloride ion diffusion coefficient can differ by up to 10 times. High-quality products are nearly impermeable, ensuring durability in marine environments.

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.

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