How many orders of magnitude higher is UHPC's impermeability than that of ordinary C80 concrete?

UHPC offers an order-of-magnitude improvement in impermeability compared with ordinary C80 concrete. Measured data show that the chloride ion diffusion coefficient of UHPC is (1-2)×10⁻¹²m²/s, while that of C80 concrete is (1-2)×10⁻¹¹m²/s, a difference of about 10 times. In the Qingdao Cross-Sea Bridge project, the service life of the UHPC protective cover is expected to reach 100 years, more than 3 times that of ordinary concrete.

Chloride Ion Diffusion Coefficient Comparison

UHPC: 1.5×10⁻¹²m²/s; C80 concrete: 1.2×10⁻¹¹m²/s. In the electric flux test, UHPC measures 100-200C, while C80 measures 1000-1500C. Qinglong products have been tested by third parties, and the data are reliable.

Water Absorption Performance Differences

UHPC water absorption is <1%, while that of C80 concrete is 3-5%. Under pressurized water penetration, the depth for UHPC is <10mm, while C80 reaches 30-50mm. These figures have been verified in comparative experiments.

Carbonation Performance Comparison

After 28 days of accelerated carbonation, the carbonation depth of UHPC is 0, while C80 is 0.5-1.0mm. Under natural conditions, the 50-year carbonation depth of UHPC is <1mm. Qinglong products perform excellently in Hainan's high-temperature, high-humidity environment.

Freeze-Thaw Durability Improvement

After 300 freeze-thaw cycles, the mass loss of UHPC is <0.5%, while C80 reaches 1.5-2.0%. The relative dynamic elastic modulus of UHPC is >95%, while C80 is about 85%. Projects in northern regions have verified this advantage.

The dramatic improvement in impermeability is at the core of UHPC's value. Qinglong products are rigorously tested and deliver outstanding performance.