Soil Thermal Testing

What we do

Soil Thermal Testing offer on-site and laboratory testing services of thermal resistivity and other associated properties of soils, rocks and backfill for the power cable laying industry.

Soil or ground thermal resistivity (soil thermal conductivity or soil thermal diffusivity) testing is required to determine cable design and or trench design prior to cable placement.

Soil Thermal Testing can test the ground prior to or during any site works, within trenches or in our specialised laboratory.

We test soils, rocks and cable bedding materials such as Cement Bound Sand and in recent years have worked with some of the biggest cable laying companies, such as ABB, Volker Infra and Prysmian, on some of the longest cable routes in the UK.

Of critical importance is the accuracy of resistivity measurements both on site and in the essential supporting laboratory assessments. We continually conduct in-house research in this area to understand the soil physics of the environment around a cable in order to deliver highly accurate and representative thermal resistivity measurements. Please see our information sheet (PDF).

Laboratory thermal testing of:

  • Cement Bound Sand (CBS)
  • Gravel backfill
  • Selected sand backfill
  • Rock
  • Concrete
  • Grout
  • Soil back fill screened to specification

Laboratory testing of:

  • Cohesion
  • Voids ratio
  • Density
  • Particle size distribution (PSD)
  • Moisture content

On-site thermal testing of:

  • Natural soils along a cable route
  • Rock and soils within an open trench
  • Gravel or sand backfill and bedding material

Experimental research work:

We can vary cement contents of CBS, test at varying densities and moisture contents or design a programme of testing to meet the needs of your project.