Soil & Gravel Testing
Accredited geotechnical soil and gravel testing — classification, compaction, CBR and foundation testing — so you can build on ground you understand and can defend.
What's included
- Foundation indicator tests
- Grading & Atterberg limits
- Moisture / density (Proctor)
- California Bearing Ratio (CBR)
- Dynamic Cone Penetrometer (DCP)
- Field & compaction control
Soil & Gravel Testing
The performance of every road, platform and foundation starts with the material beneath it. Soil and gravel testing tells you how a material will behave — its strength, plasticity, compaction characteristics and bearing capacity — before it costs you on site.
Letaba Lab carries out the full suite of indicator and foundation tests: grading, Atterberg limits, moisture/density relationships (Proctor), CBR and in-situ DCP surveys. Results are produced under SANAS ISO/IEC 17025 accreditation to recognised national standards.
Our field teams sample and test on-site, and we can establish a site laboratory for large earthworks and roads programmes anywhere in Southern Africa.
Industries served
Trusted by the sectors that depend on defensible materials data.
Why clients choose Letaba Lab for this
Reduce foundation risk
Know a material's strength and behaviour before it is placed, not after a failure.
Tested to national standards
Indicator, compaction and CBR testing to TMH1 and SANS methods under accreditation.
Field & on-site testing
DCP surveys and field density testing, with site laboratories for major programmes.
From sample to signed-off results
A clear, accredited workflow that keeps your programme moving.
Sampling
Representative samples are taken on-site to national standards, or DCP surveys run in the field.
Preparation
Samples are prepared and conditioned in the laboratory ready for testing.
Accredited testing
Indicator, compaction and CBR tests are run under ISO/IEC 17025 methods.
Reporting
Clear, certified results with the parameters your designer and client need.
Equipment & applicable standards
Equipment we use
- Compaction moulds & rammers
- CBR test apparatus
- Sieve sets & mechanical shakers
- Atterberg limit apparatus
- Dynamic Cone Penetrometers
- Drying ovens & calibrated balances
Applicable standards
Testing is carried out to recognised South African and international standards. Confirm the exact accredited scope for your branch.
Frequently asked questions
Which indicator tests do you offer?
What is a DCP survey used for?
Do you offer field density testing?
Can you set up a laboratory on our site?
Is the testing accredited?
Complete your testing scope
Ready to discuss your project?
Submit your details and receive a formal quotation within 24 hours — from a SANAS accredited laboratory trusted since 1986.