Horizon Geosciences

Survey and geotechnical services

Laboratory Testing

Horizon’s comprehensive soil and rock testing laboratory offers high quality geotechnical testing on samples obtained in offshore and nearshore investigations and is certified to ISO/IEC 17025:2017.

The testing capability within the onshore laboratory enables engineering parameters to be measured for the latest design specifications for offshore structures including pipelines and cables routes, platform foundations, breakwaters, jetty and port developments, reclaimed land and dredging applications.

Our fleet of mobile laboratories offers a range of geotechnical testing apparatus available for easy and quick mobilisation. Horizon’s  offshore laboratories allow for the fast turnaround of critical tests for classification, measurement and strength parameters. Onsite testing allows engineering parameters to be determined during the field work and enables a timely preliminary engineering analysis to be undertaken and provided to our clients.

The tests available include, but are not limited to:

Accredited Test:

Classification tests

  • Moisture Content (BS 1377-2, BS EN ISO 17892-1, ASTM D2216)
  • Determination of Density (Unit Weight) of Soil (ASTM D7263)
  • Bulk Density – linear measurement method (BS EN ISO 17892-2)
  • Particle Density (BS 1377-2, BS EN ISO 17892-3, ASTM D854)
  • Particle Size Distribution-Wet & Dry sieving (BS 1377-2, BS EN ISO 17892-4, ASTM D422, ASTM D6913/6913M)
  • Particle Size Distribution-using Sedimentation (Hydrometer) (BS 1377-2, BS EN ISO 17892-4, ASTM D422, ASTM D7928)
  • Liquid Limit, Plastic Limit and Plasticity Index of Soil (BS 1377-2, BS EN ISO 17892-12, ASTM D4318)
  • Minimum Index Density (ASTM D4254)
  • Maximum Index Density (ASTM D4253)

Chemical tests

  • Rapid Determination of Carbonate Content of Soils (ASTM D4373)
  • Moisture, Ash, and Organic Matter of Peat and Other Organic Soils (ASTM D2974)
  • Total sulphate by acid extraction (BS 1377-3)
  • Water Soluble Sulphate (BS 1377-3)
  • Chloride Content (water and acid extract) (BS 1377-3)
  • Mass Loss on Ignition, Organic matter in the soil (BS 1377-3)
  • pH Value (BS 1377-3)
  • Calcium Carbonate Content using Rapid titration method (BS 1377-3)

Strength (soil)

  • Triaxial

– Unconsolidated Undrained Intact (UU) and Remoulded (UU-R) (BS 1377-7, BS EN ISO 17892-8, ASTM D2850)
– Direct Shear Strength-Small Shear box (peak and residual) (BS 1377-7, BS EN ISO 17892-10, ASTM D3080/D3080M)
– Miniature Vane Shear Test (ASTM D4648/D4648M)

Rock tests

  • Unconfined compressive strength (UCS) (ASTM D7012)
  • Compressive Strength and Elastic Moduli of Intact Core Specimens (UCSE) (ASTM D7012)
  • Point Load Strength Index of Rock (ASTM D5731)

Consolidation tests (soil)

  • Consolidation Test (Incremental Loading Oedometer Test) (loading stages to maximum 6400 kPa) (BS 1377-5, BS EN ISO 17892-5, ASTM D2435/D2435M)
  • Measurement of swelling pressure
  • Computer controlled rowe/barden cell for:

– Constant rate of strain
– Constant load with pore pressure measurement
– Stepped load with pore pressure measurement

Miscellaneous tests

  • Soil Resistivity Using the Wenner Four-Electrode Method (ASTM G57)
  • Thermal Conductivity of Soil and Soft Rock by Thermal Needle Probe Procedure (ASTM D5334)
Non-accredited Test:

Strength (soil)

  • Torvane and pocket penetrometer
  • Triaxial

– Consolidated drained (CD)
– Consolidated undrained (CU)
– Interface shear (maximum normal stress to 800 kPa)
– Interface ring shear

Rock tests

  • Indirect Tensile Shear (Brazilian test)

Miscellaneous tests

  • Constant head permeability