What is soil suction?

Soil suction is used to determine the total suction of soil. This is measured by the dewpoint temperature of a thermocouple in a small air space in equilibrium.

What factors can affect soil?

Factors that can impact soil include:

  • The particle size of the soil grains
  • History of drying and wetting cycle
  • The angle of contact
  • Soil structure
  • The temperature of the soil
  • Water content of the soil
  • Dissolved salts in the soil, and
  • The denseness of the soil.

What are the main features of soil suction?

Soil suction is formed when there is an interaction between soil, water and air, that creates a complex energy.

How do you measure soil suction?

We use a Dewpoint Potentiometer to Measure the soil (Chilled Mirror Dew Point).

What is a matric suction?

Matric suction, or negative matric potential, is the free energy change in a unit volume of water when isothermally transferred from soil water state to the free water state and is defined at the soil-water-air representative elementary volume.

What are the benefits of soil suction?

Soil Suction is important for investigating geotechnical problems and preventing hazards. Suction is an important factor affecting the engineering properties of unsaturated soils.

Do you have a project that requires soil suction testing?

For more information about our soil suction testing services, that are available at our Coffey Testing – Adelaide facility, do not hesitate to get in touch with our friendly team here.

Alternatively, you can request a quote here.