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Soil laboratory testing

NatTest Lab performs soil laboratory testing for NattestGeo. Select the classification and engineering tests for your samples and project requirements.

What it tells the engineer

Laboratory tests turn samples into design numbers: classification and plasticity, particle size, compaction and CBR, shear strength and consolidation.

When it is used

After boreholes and sampling, for earthworks and pavement design, and for foundation and slope design.

How a job runs

  1. 1

    Brief

    Your site, the structure and what the design needs to know.

  2. 2

    Plan

    Test locations, methods and the reporting you need.

  3. 3

    Fieldwork

    Testing, drilling and sampling on site by our field team.

  4. 4

    Report

    Logs, plots and test results for your engineer.

Typical outputs

  • Test reports for each sample
  • Classification and index properties
  • Strength and compaction results

Questions

Who performs the tests?

NatTest Lab, our sister laboratory. See its certificates for the accredited scope.

Soil tests by NatTest Lab

  • Atterberg Limits Tests

    Atterberg limits testing assesses the consistency and plasticity of fine-grained soil. Results support soil c…

  • Direct Shear Test

    Direct shear testing measures soil resistance along a defined shear plane under an applied normal load. Resul…

  • Field Density Test (FDT)

    Field density testing measures the density achieved in placed soil or fill. Results can be compared with the …

  • Hydrometer Test

    Hydrometer analysis determines the particle-size distribution of fine soil fractions from their settling beha…

  • In-Situ California Bearing Ratio (CBR) Test

    In-situ CBR testing measures resistance to penetration in pavement support materials. Results support assessm…

  • Laboratory California Bearing Ratio (CBR) Test

    Laboratory CBR testing measures penetration resistance in prepared soil or pavement-material specimens. Prepa…

  • Linear Shrinkage Test

    Linear shrinkage testing measures the reduction in length of a prepared soil sample as it dries. Results supp…

  • Moisture Content Test

    Moisture content testing measures water content relative to the dry mass of a soil sample. Results support so…

  • Particle Density Test

    Particle density testing measures the density of soil solids. Results support calculations of soil volume rel…

  • Particle Size Distribution

    Particle-size analysis determines the distribution of soil sizes. Sieve and hydrometer methods are selected f…

  • Plate Bearing Test

    Plate bearing testing measures ground settlement under an applied plate load. Results support assessment of l…

  • Point Load Test

    Point load testing determines a rock strength index. Any estimate of uniaxial compressive strength requires a…

  • Proof Rolling Test

    Proof rolling identifies visible movement or weak areas in prepared ground under an agreed vehicle load. It i…

  • Soil Bulk Density Test

    Bulk density testing measures soil mass per unit total volume, including pore spaces. The report should disti…

  • Soil Compaction Test

    Compaction testing establishes the relationship between moisture content and dry density. It determines maxim…

  • Soil Testing

  • Specific Gravity of Soil Test

    Specific gravity testing compares the density of soil solids with that of water. It is a dimensionless ratio …

  • Triaxial Compression Test

    Triaxial testing measures soil strength and stress–strain behaviour under controlled confinement. Drainage an…

  • pH Value Test

    Soil pH testing measures acidity or alkalinity. Results support chemical assessment of the ground alongside o…