GB/T 30807-2025 specifies the method for determining the long-term water absorption of thermal insulation products for building applications by immersion. This method involves partially or completely immersing the test specimen in water for up to 28 days or longer, and calculating the volumetric water absorption rate or water absorption coefficient by measuring its mass increase. It is used to evaluate the moisture absorption performance of materials under long-term exposure to water environments.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | Active | ||
|---|---|---|---|
| CCS | Q 25 | ICS | 91.120.10 |
| Release Date | 2025-06-30 00:00:00 | Implementation Date | 2026-01-01 00:00:00 |