Fraunhofer Institute for Building Physics
Water absorption
Hygrothermics
| Measurement | Capillary water absorption, a-value |
| Standards | DIN EN ISO 15148, DIN EN 1015-18, DIN EN 12087 |
| Measurement object | Mineral materials like brick, lime stone, sandstone, concrete, plasters and renders, insulation materials, coatings, etc. |
Technical data
| Sample size, circular | Diameter 90 mm, 100 mm, 200 mm |
| Sample size, rectangular (L × W) | 100 mm × 100 mm 200 mm × 100 mm 180 mm × 130 mm |
| Sample size, prism (L × W × H) | 40 mm × 40mm × 40 mm |
| Irregular surface areas are possible as well, minimum area 50 cm² |
Special features
| Accredited by DAkkS D-PL-11140-11-02 |
The laboratory has a flexible accreditation according to DIN EN ISO/IEC 17025 Test laboratory moisture, mortar, radiation, emmissions |
| Test reports can be issued. |
More information
- The water absorption coefficient is used to evaluate the capillary water uptake of building materials and an important data to estimate moisture protection of constructions.
- With the knowledge of the water absorption coefficient the calculation of the capillary transport coefficients for the water uptake is possible. These coefficients are used in simulations with WUFI®.