Are There Significant Durability Differences Among UHPC Manufacturers' Products? A Comparative Study of Qinglong UHPC Durability

There are indeed significant differences in durability among UHPC products from different manufacturers. These differences are mainly reflected in raw material quality, production processes, quality control systems, and other aspects. High-quality UHPC is expected to achieve a service life of over 100 years under normal use conditions.

In a coastal project in Hainan, Qinglong UHPC has withstood 8 years of harsh high-temperature, high-humidity, and high-salinity environmental conditions. The latest test data shows: a carbonation depth of only 0.2mm and a chloride ion diffusion coefficient below 1.0×10⁻¹²m²/s. During the same period, products from some other manufacturers have already shown surface weathering under the same conditions. This difference can also be verified through accelerated aging tests: after 300 freeze-thaw cycles, high-quality products have a mass loss rate <0.5%, while the dynamic elastic modulus retention rate is >95%.

Differences in Carbonation Resistance

The 50-year carbonation depth of high-quality products is less than 1mm. This stems from a dense microstructure that effectively blocks carbon dioxide penetration.

Comparison of Chloride Ion Erosion Resistance

The chloride ion diffusion coefficient can differ by up to 10 times. High-quality products are nearly impermeable to water, ensuring durability in harsh environments.

Freeze-Thaw Resistance Gap

After 300 rapid freeze-thaw cycles, the difference in mass loss rate is significant. High-quality products have a dynamic elastic modulus retention rate >95%.

Long-Term Performance Tracking Data

Tracking of projects in service for over 10 years shows clear differences in performance retention rates. High-quality products have a strength retention rate exceeding 95%.

Choosing high-quality UHPC products can provide long-term assurance for projects.