Soil Testing Services for Construction and Engineering Projects
Soil conditions play a crucial role in the performance of construction and engineering projects, from building foundations and earthworks to roads, drainage systems, and infrastructure design. Variations in strength, moisture content, density, and composition can significantly influence how a structure behaves over time.
At ACS, we provide independent soil testing services for construction and civil engineering projects across the UK, assessing the physical, mechanical, and chemical properties of soils and ground materials. All testing is carried out in accordance with British Standards, providing the reliable data needed to support safe, compliant, and well-informed engineering decisions.
Why Soil Testing Matters in Construction
Soil analysis helps determine whether ground conditions are suitable for construction before work begins. Without accurate data, foundations may be incorrectly designed, leading to settlement, instability, or long-term structural issues.
Our trusted soil testing services support:
- Determination of soil suitability for building foundations
- Assessment of strength, compaction, and bearing capacity
- Identification of moisture content and permeability
- Understanding of settlement risk and ground behaviour
- Verification of material suitability for earthworks and infrastructure
Accurate soil testing is essential for foundation design, including soil tests for foundation planning and early-stage ground investigations.
Our Soil Testing Capabilities and Laboratory Analysis
ACS carries out a comprehensive range of soil testing methods to evaluate both engineering performance and material composition. Our soil sampling laboratory processes numerous natural and engineered soils under controlled UKAS-accredited conditions.
Testing programmes can be tailored to project requirements, whether for routine geotechnical design, environmental soil testing, or detailed ground investigation works.
Our soil testing capabilities include:
- Moisture content and density testing
- Particle size distribution (PSD) analysis
- Atterberg limits and plasticity index
- CBR (California Bearing Ratio) testing
- Compaction testing (MCV, MDD/OMC)
- Shear strength and stability testing
- Permeability and drainage assessment
- Sedimentation and fine soil analysis
- Topsoil classification (to BS 3882 limits)
Available Soil Test Methods
| Test | Method | What is shows |
| Natural Moisture Content | BS 1377-2 | Percentage of water in a soil based on dry mass |
| Saturated Moisture Content or IDD | BS 1377-2 | Carried out on chalk lumps to determine suitability |
| Plasticity Index (Atterberg Limits) | BS 1377-2 | 4 parts, Liquid Limit, Plastic Limit, plasticity index and liquidity index. Clay testing to determine suitability and shrink ability potential |
| Equilibrium CBR | Combination of tests, Moisture Content, Grading, sedimentation and Atterberg limits used by designers to calculate potential CBR value. | |
| Particle Size Distribution (PSD) | BS 1377-2 | Grading of soils for compliance to specification including SHW, also provides data to determine uniformity coefficient |
| Sedimentation | BS 1377-2 | Additional to PSD to provide a grading of material passing 63micron to 2 microns |
| Moisture Condition Value (MCV) | BS 1377-4 | Compaction test to determine the compactive effort required to compact a material in to a cylinder at ‘as received’ moisture content. |
| CBR Testing | BS 1377-4 | Laboratory CBR can be carried out on material at natural or specified moisture content, in additional soaked lab CBR involves immersing the sample in water and measuring swell |
| Shear Strength Testing | BS 1377-7 | Applying pressure to a disturbed or un-disturbed sample to measure force required to shear a clay sample. |
| MDD/OMC (2.5kg, 4.5kg and vibrating hammer) | BS 1377-4 | 5-point test to determine the optimum water content to achieve the best density, different compaction methods depending on the material type and size. |
| Permeability | BS 1377-6 | To determine flow of water through a specimen of clay/silt for purposes of landfill design/compliance testing. |
| Topsoil Suite | BS 3882 | Combination of physical and chemical testing to determine the suitability of topsoil and reported with BS 3882 limits. |
Need support with soil testing for construction or foundation design? Contact the ACS team to discuss your requirements and request a quote today.
UKAS-Accredited Soil Testing Laboratory Services
Since 1990, ACS has developed extensive capability in soil and ground materials analysis, supported by UKAS accreditation and decades of industry experience. Our soil testing laboratories are equipped to deliver consistent, high-quality results for diverse construction and environmental applications.
Our experienced technicians and engineers also provide practical support, including guidance on suitable test selection and interpretation of results. Our expertise makes us perfectly placed to help you understand ground behaviour and make informed decisions across construction, infrastructure, and land development projects.
Why Choose ACS for Soil Testing?
- UKAS-accredited soil testing laboratories
- Soil testing for construction, geotechnical, and environmental projects
- Experienced technicians and engineering support
- Wide range of recognised laboratory testing methods
- Support for foundation design and ground investigations
- Clear reporting and reliable turnaround times
ACS delivers reliable soil testing services that support safe, compliant, and well-informed construction decisions, helping clients manage ground risk and improve long-term performance across UK projects.
Contact us for Soil Testing Services
Frequently Asked Questions
What is soil testing?
Soil testing is the analysis of soil properties such as strength, moisture content, density, and composition. It helps determine whether ground conditions are suitable for construction and supports design decisions for building foundations, earthworks, and infrastructure projects.
Why is soil important in construction materials?
Soil properties directly affect structural design and material selection in engineering projects. Characteristics such as strength, compaction, density, and chemical composition influence how ground behaves under load and are essential for safe and stable construction.
What is the purpose of soil testing in construction?
Soil investigations are used to determine key engineering properties such as bearing capacity, settlement potential, moisture content, and permeability. These results support foundation design and help ensure structures are built on suitable ground conditions.
What is a soil test for foundation design?
A soil test for foundation design assesses how ground conditions will support structural loads. It provides data used to design safe and appropriate foundations and helps reduce risks such as settlement, movement, or structural failure.
Where is soil analysis carried out?
Soil investigations are carried out in ACS UKAS-accredited soil sampling laboratory facilities, where soil and ground samples are analysed under controlled conditions to ensure accurate and reliable results.
What is environmental soil testing?
Environmental soil testing assesses chemical and physical properties of soil to identify contamination, support land classification, and inform remediation or redevelopment strategies.
How do independent soil testing services support construction projects?
Professional soil testing services provide the data needed to design safe foundations, plan earthworks, and assess ground suitability. It reduces uncertainty in early-stage design and helps manage risk across construction and infrastructure projects.
How much does soil testing cost for construction projects?
The cost of soil testing for construction and foundation projects varies depending on the type of testing required, the number of samples, and the complexity of the site conditions. Basic testing may focus on a small number of parameters, while more detailed geotechnical or environmental soil testing programmes require a wider range of analysis.
Please see below for a list of the services provided by ACS:
Geo-Environmental Consultancy
The ACS Geo-Environmental Consultancy Department has been operating as part of ACS for over 10 years.
On-Site Testing Services
ACS offers a comprehensive range of professional on-site testing, all carried out by our fully trained site technicians.
Aggregates and Soils Testing
From our main laboratory in Poole, Dorset, ACS provide quality testing and material consultancy for the construction and civil engineering industry.
Bituminous Testing
ACS carries out testing on new bituminous binder material and testing on hardened material for physical and chemical properties. Circa pre 1980’s Tar (Carcinogenic effects) was also used as a binder, ACS staff can sample and test materials to assess if Tar was used.
Concrete Testing
Concrete was the first service to be offered by ACS back in 1987. Since then, we have increased our scope to cover a wide range of UKAS Accredited testing methods on fresh and hardened concrete.
Mortar and Screed Testing
ACS can sample and test new and hardened mortar. Hardened mortar for mix proportions and constituents, new mortar for compressive and flexural strength.
Natural Stone Testing
Our newly refurbished stone testing laboratory has given us the opportunity to expand our testing scope. In addition, we have increased production and improved on our turnaround of samples.
Site Laboratory Services
Over the last 35 years, ACS have supplied custom fitted site laboratories with technicians to many construction sites and projects worldwide.