ISO 13428:2024 PDF

Overview

ISO 13428:2024 - Geosynthetics - Determination of the protection efficiency of a geosynthetic against impact damage specifies an index test (and an optional performance test) to quantify how well a geosynthetic protects a hard surface from impact by a hemispherical object. The method measures the change in thickness of a soft metal plate (typically a lead plate) placed between the geosynthetic specimen and a rigid steel support after controlled impact. The test applies to geosynthetics with apertures smaller than 15 mm.

Key topics and technical requirements

• Test principle: A hemispherical probe strikes the geosynthetic specimen lying on a lead plate over a rigid steel support. Impact energy E = F × h (force × drop height).
• Index test parameters:
  • Probe head: hemispherical, (20 ± 0.5) mm diameter; probe mass for index tests (1 000 ± 2) g; falling height (1 000 ± 10) mm.
  • Lead plate: soft lead (EN 12588 grade 3) nominal thickness (2.0 ± 0.2) mm; initial and residual thickness measured in impact area.
  • Specimens: five specimens per face, square, minimum 60 × 60 mm; applicable to geosynthetics with apertures