How Is the Impermeability of UHPC Manufacturer Products? Protective Performance and Qinglong Group's Impermeability Technology Breakthrough

The impermeability of UHPC products is the foundation of their outstanding durability. Premium UHPC should possess three key characteristics: "extremely low permeability, self-healing capability, and long-term stability." R&D test data from Qinglong Group shows that our UHPC products achieve a water penetration height of less than 5mm (standard specimens), a chloride ion diffusion coefficient below 0.5×10⁻¹²m²/s, a water absorption rate under 2%, and an impermeability grade of P20 or higher. In an undersea tunnel repair project of Shenzhen Metro, Qinglong Group UHPC was used for leakage remediation; after 3 years of monitoring, no water seepage occurred, and the impermeability pressure remained above 2.5MPa. Impermeability is not a single metric—it is the fundamental guarantee of a material's long-term service in harsh environments.

Microstructure Achieves Intrinsic Impermeability

Qinglong Group optimizes particle gradation to bring the material to its tightest packing state, controlling total porosity within 3%, with harmful pores (larger than 50nm) accounting for less than 5%. Scanning electron microscope analysis shows that the hydration products of our UHPC are dense, with an interfacial transition zone that is nearly invisible, forming a "molecular-level" barrier. This dense structure ensures that under 1.2MPa water pressure held for 24 hours, the water penetration depth is only 3.8mm—far exceeding national standard requirements.

Self-Healing Capability Enhances Long-Term Impermeability

We have incorporated microcapsule self-healing technology into UHPC: when microcracks appear, the capsules rupture and release healing agents that automatically fill the cracks. Tests show that cracks up to 0.1mm in width can achieve over 90% self-healing within 7 days, restoring impermeability. This technology has been successfully applied in high-humidity environment projects in Hainan.

Chloride Ion Penetration Resistance Ensures Rebar Durability

Tested by the electric flux method, Qinglong Group UHPC shows a 6-hour electric flux of less than 100 coulombs, with a chloride ion diffusion coefficient only 1/50 that of ordinary concrete. In a bridge deck pavement project of a sea-crossing bridge in Qingdao, the use of our UHPC is expected to delay the risk of rebar corrosion by more than 100 years, substantially extending the structure's service life.

Qinglong Group has established a complete impermeability performance evaluation system, covering everything from raw material formulation and production processes to long-term monitoring, ensuring that every batch of products delivers outstanding impermeability and provides reliable protection for engineering projects.