Impermeability Analysis of UHPC Manufacturer Products: A Study on the Compactness Performance of Qinglong UHPC

The impermeability of UHPC mainly depends on material density. Premium UHPC has a porosity of ≤6%, a chloride ion diffusion coefficient of ≤2×10⁻¹²m²/s, and an impermeability grade of ≥P12. Through optimum packing theory and nano-modification technology, Qinglong UHPC achieves product porosity of ≤5%, a chloride ion diffusion coefficient of ≤1.5×10⁻¹²m²/s, and impermeability more than 10 times that of ordinary concrete.

Impermeability verification: no penetration under water pressure of 1.2MPa for 8 hours; the chloride ion migration coefficient test shows a chloride ion penetration depth of ≤5mm at 84 days; the accelerated electric field test shows chloride ion penetration resistance 20 times that of ordinary concrete. A subsea tunnel project using Qinglong UHPC effectively resisted seawater corrosion, with no leakage over 5 years of use.

Density Control

Optimum packing theory optimizes particle gradation, porosity ≤6%; nanomaterials fill micropores to further reduce porosity; low water-binder ratio reduces capillary pores; high-range water reducers ensure workability. High density is the foundation of impermeability.

Chloride Ion Diffusion Barrier

Chloride ion diffusion coefficient ≤1.5×10⁻¹²m²/s; penetration depth in accelerated electric field test ≤10mm; slow penetration in long-term immersion tests; significant rebar protection effect. Effectively blocks chloride ions.

Gas Permeability Control

Oxygen permeability coefficient ≤10⁻¹⁷m²/s; low carbon dioxide penetration rate; small moisture diffusion coefficient; high resistance to chemical media penetration. Multiple impermeability safeguards.

Long-Term Impermeability

10 years of actual project verification with no leakage; stable performance in accelerated aging tests; microscopic structure observation shows no pore development; performance predictions indicate long-term effectiveness. Reliable long-term impermeability.

Excellent impermeability ensures durability. Qinglong UHPC high-impermeability products are suitable for harsh environments.