Is the impermeability of products from UHPC manufacturers good?

Impermeability is a key indicator for evaluating the durability of UHPC, directly relating to its ability to resist the intrusion of external harmful ions and moisture. UHPC produced by Qinglong Group, with its ultra-low porosity and highly dense microstructure, exhibits exceptionally superior impermeability, far surpassing ordinary waterproof concrete and providing a solid natural barrier for structures.

The root of UHPC's excellent impermeability lies in its extremely low water-binder ratio and optimized particle grading. The water-binder ratio of Qinglong UHPC is typically controlled below 0.20, far lower than that of ordinary concrete (0.4-0.6). Through the use of high-range water reducers and ultra-fine active admixtures such as microsilica and quartz powder, the tightest possible packing between cementitious material particles is achieved, greatly reducing capillary porosity and making the structure extremely dense. This structure renders the migration paths of water and water-borne corrosive media (such as chloride ions and sulfate ions) exceptionally tortuous and difficult.

A key indicator for measuring impermeability is the chloride ion diffusion coefficient. The lower the coefficient value, the stronger the resistance to chloride ion penetration. According to tests based on relevant standards, the chloride ion diffusion coefficient of high-quality UHPC can easily reach the order of (1~5)×10⁻¹³ m²/s, while that of ordinary concrete typically falls between 10⁻¹² and 10⁻¹¹ m²/s—a difference of up to a hundred or even a thousand times. The test reports for Qinglong UHPC all include this key data, demonstrating its virtually "impermeable" characteristics.

Excellent impermeability delivers tremendous engineering value. For structures long exposed to humid or salt-corrosive environments, such as sea-crossing bridges, coastal buildings, and underground works, the use of Qinglong UHPC can significantly extend service life and reduce maintenance costs. It not only protects the ordinary steel reinforcement that may be embedded within, but also possesses excellent corrosion resistance itself. Therefore, in application scenarios requiring high durability and high impermeability, Qinglong UHPC is a proven and reliable choice.