Great Southern Geotechnics Pty Ltd provides a comprehensive range of field and laboratory construction materials testing services that comply with both Australian Standards and Main Roads WA Specifications.

We offer well-trained staff in conjunction with a modern facility implemented with quality assurance practices to ensure that your test results are accurate, reliable and on time.

Great Southern Geotechnics is dedicated to providing our clients with superior customer service and assist wherever possible.



  • Site Classification
  • Moisture content (drying oven)
  • Sieve analysis
  • liquid limit(cone)
  • plastic limit
  • cone plasticity index;
  • linear shrinkage
  • description, identification and classification of soils
  • Modified, Standard compaction
  • Dry density ratio, moisture variation and moisture ratio; field density using a nuclear gauge
  • California Bearing ratio (remoulded specimens)
  • Compressive strength (maximum dry, unconfined)
  • Permeability Tests ‐ Constant Head, Falling Head
  • Penetration (dynamic‐cone, Perth sand)
  • Calcium carbonate content
  • Layer Thickness, Texture Depth


  • Sampling
  • Fresh concrete
  • Slump test
  • Making and curing compression specimens
  • Compressive strength tests
  • Rapid Measurement methods


  • Bulk density
  • Particle size distribution
  • Average least dimension
  • Flakiness index
  • Moisture content