E2109-01 remains the go-to for testing because it simulates real-world foot traffic and cleaning cycles after staining.
If the integrity of the sample preparation is in doubt, ASTM E2109-01 suggests verifying microstructural features using other methods like Energy Dispersive Spectroscopy (EDS) or Scanning Electron Microscopy (SEM) on a cryogenic fracture surface. Where to Find the ASTM E2109-01 PDF astm e2109-01 pdf
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