Is the Impermeability of UHPC Manufacturer Products Good? Dense Barrier and Qinglong Group's Waterproof Fortress

The impermeability of UHPC products is a direct manifestation of their high durability, stemming from the physical and chemical barrier formed by “extremely low porosity, non-connected pore structure, and hydrophobic treatment.” Premium products can reach an impermeability grade of P12 or above (withstanding 1.2MPa water pressure without seepage), with a chloride ion diffusion coefficient as low as the 10⁻¹² m²/s order. Through vacuum dewatering technology and the addition of silane-based hydrophobic agents, Qinglong Group keeps water absorption at ≤6%; on the roof of the Hainan Convention and Exhibition Center, it has withstood a decade of typhoons and rainstorms with zero leakage. Impermeability is the first line of defense against environmental attack.

Microstructure Determines the Innate Impermeability Advantage

With a water-binder ratio ≤0.20, ultra-fine materials such as silica fume fill nano-scale pores, keeping total porosity <5% with tortuous, non-connected pores. Water molecule migration paths are blocked and the permeability coefficient is <10-14 m/s, making it nearly a watertight material. Qinglong products showed no penetration when sprayed with a high-pressure water jet (1MPa).

Proven Applications in Waterproofing Projects

In an undersea tunnel in Shenzhen, it was used as the waterproofing layer for tunnel segments with an impermeability grade of P16, replacing traditional external waterproofing. On the planted roof of China Resources MixC One in Wuxiang, Nanning, it serves both structural load-bearing and waterproofing functions, simplifying construction and saving costs. These cases demonstrate its outstanding impermeability.

Enhancement Measures and Long-Term Retention

Surface silane impregnation treatment achieves a contact angle >90°, producing a “lotus leaf effect” with rainwater self-cleaning. We provide a 10-year impermeability guarantee along with regular follow-up inspections. With proper maintenance, impermeability can remain undiminished for decades.

Clear Advantages over Ordinary Materials

Ordinary concrete typically has an impermeability grade of P6-P8, which degrades with age. Thanks to continued hydration, UHPC grows denser and its impermeability actually improves over time, making it the preferred choice for permanent waterproofing.

Therefore, the impermeability of UHPC far exceeds that of traditional materials. With superb craftsmanship, Qinglong Group builds a watertight protective system for its customers.