Sand Testing

AFW keeps close process control of sand properties for improved quality and productivity. Sand testing in AFW’s Quality Assurance Lab encompasses a variety of sand analyses shown below.

Green sand samples are taken daily to test for permeability, shear and compression strength, moisture percentage, compactability and working clay. These numbers are used in conjunction with readings from the muller [machine that mixes and restores the ready-to-use texture of the molding sand] as well as the results from a monthly outside lab test to make adjustments on the sand being used for molding.

Air set samples from the Tinker mixer and the Palmer production line are taken daily to test the core tensile strength. These numbers show us the rate at which sand is setting up as well as its strength level. LOI testing is also performed to ensure proper binder percentages are maintained.


  • Sand Compaction
  • Strength Testing
  • Moisture Testing
  • Permeability
  • Methylene Blue
  • LOI
  • Screen Analysis


  • Sand Strength Tester
  • Moisture Analyzer
  • Permeability Meter
  • Sand Rammer
  • Methylene Blue Equipment
  • LOI Equipment
  • Sieve Analysis Equipment
sand testing
sand testing