This standard specifies the method for conducting a pressure head test on bitumen-based felts used for waterproofing. It details the apparatus, specimen preparation, procedure, and reporting requirements to evaluate the material's resistance to water penetration under a constant hydrostatic pressure.
Bitumen-based felts - Method of the test, Part 4: Pressure head test
Quick Reference Values
Sample drying temperature105 ± 5 °C
Test specimen area100 cm²
Analytical balance accuracy0.001 g
Key Formulas
Binder Content, % by mass = ((M1 - M2) / M1) * 100
Practical Notes
This is a destructive test primarily used for quality control by manufacturers and for third-party verification.
Ensure adequate ventilation and use appropriate personal protective equipment (PPE) when handling solvents like trichloroethylene.
The accuracy of the result is highly dependent on drying the sample to a constant mass before and after extraction.