Geotechnical laboratory testing is an integral part of all geotechnical investigations and geotechnical design.

With our own in house facility STEYN-WILSON GEOTECHNICAL being only the second SANAS Accredited Geotechnical Laboratory in South Africa, quality can now be guaranteed.

Our geotechnical investigations are performed by Technologists, Geologists and trained Technicians to obtain information on the physical properties of soil and rock around a site for proposed structures and for repair of distress to earthworks and structures caused by subsurface conditions.

A geotechnical investigation will include surface exploration and subsurface exploration of a site. Sometimes, geophysical methods are used to obtain data about sites. Subsurface exploration usually involves soil sampling and laboratory tests of the soil samples retrieved.

  • FALLING HEAD PERMEABILITY
  • ANGLE OF RESPONSE OF SANDS
  • CONSTANT HEAD PERMEABILITY
  • SHEARBOX
  • OEDOMETER
  • DOUBLE OEDOMETER
  • FREE SWELL AND SWELL PRESSURE
  • COLLAPSE POTENTIAL
  • LUMP TEST
  • POROSITY
  • FLEXIBLE WALL PERMEABILITY (TRIAXIAL PERMEABILITY)
  • CONSOLIDATED UNDRAINED TRIAXIAL
  • CONSOLIDATED DRAINED TRIAXIAL
  • UNCONSOLIDATED UNDRAINED TRIAXIAL
  • SOIL SUCTION (MOISTURE CONTENTS)

TRX

Triaxial shear test

With this test we determine the 2 shear strength parameters, known as the friction angle and cohesion. Our facility boasts fully automated equipment that majorly reduces the human error factor whilst enabling us to deliver these time consuming tests in the shortest timeframes possible. Typically theses tests are performed during the field investigation phase of major structures that require advanced foundation designs. Most commonly performed methods are the consolidated undrained and consolidated drained, although we cover the full spectrum of variations for the Triaxial shear strength test.