Soil Mechanics Laboratory

The following soil properties can be determined in the laboratory:
  • Water content
  • Atterberg limits
  • Water update test after Enslin
  • Grain size distribution
  • Grain density
  • Lime content test after Scheibler
  • Density
  • Density of non-cohesive soils at loosest and densest layering
  • Proctordensity
  • Coefficient of hydraulic permeability
  • Constrained modulus from oedometric testing (diameter 6 cm and 28 cm)
For the determination of shear parameters the follwing experimantes can be carried out:
  • Unaxial compression test
  • Triaxial test (with specimen diameters 35, 50, 100 or 300 mm, height /diameter -ratio 1 or 2, drained or undrained conditions
  • Direct shear test with frame sizes 6 x 6 x 2 cm, 10 x 10 x 2 cm and 30 x 30 x 10 cm
  • Biaxial test with specimen size 12 x 10 x 4 cm
For investigations of the soil behaviour under cyclic and dynamic loading
  • Triaxial tests with vertical cyclic loading, optionally with cycles of lateral stress, drained or undrained conditions
  • Resonant Column Test with specimen diameter 100 or 150 mm and height-diameter-ratio 2 or 3
  • Measurement of wave velocities during resonant column tests or triaxial tests with piezoelectrical Elements (i.e. Bender Elements) in vertical and horizontal direction

Possible Experiments on partially saturated soils:

  • Determination of the Soil water characteristic curve (SWCC) with different methods (Hanging water column, Axis Translation Technique)
  • Oedometertests, Direct shear tests, Triaxial tests, Resonant Column Test with control of water content or suction
In the area of clay research :
  • Volume change behaviour of clays
  • Influence of mineralogy and physico-chemical properties of clays on their volume change behaviour
  • Compressibility behaviour of clay under high pressure
  • Swelling behaviour of clays
  • Microstructural analysis of clays
  • Hydromechanical behaviour of fine grained soils
  • Thermo-hydro-mechanical behaviour of bentonites
  • Permeability of expansive clays

Experimental hall of the Chair

Furthermore, the experimental hall can be used to carry out model experiments on different questions in different scales.

Contact Person: Diethard König