Soil stabilisation is the chemical and mechanical improvement of in-situ ground using lime, cement or engineered binders, and SGE delivers it across housing, infrastructure, renewable energy and brownfield projects throughout the UK. We turn wet, soft or marginal ground into engineered working platforms, capping layers and formation levels without the cost and carbon of digging out and replacing material. As one of the long-established soil stabilisation companies in the country, we hold the plant, the technical experience and the laboratory capability to deliver from trial mix through to validated handover.
Detailed Service Breakdown
Soil stabilisation and modification are related but distinct services. Modification is typically used to dry out and improve the handling characteristics of wet cohesive soils so they can be compacted and worked. It uses lime or quicklime to reduce moisture content and plasticity. Full stabilisation goes further, producing a designed, measurable increase in strength and stiffness, normally targeted at a specified CBR or unconfined compressive strength value. This usually involves cement, blended hydraulic binders or a combination of lime and cement.
Our soil stabilisation service includes preliminary testing to establish material suitability, trial mixing, full-scale production, depth and uniformity control, compaction and validation testing. We work to project specific specifications written by consulting engineers. Common applications include subgrade improvement, capping construction, working platforms for piling, haul roads, and platform preparation for renewable energy schemes.
Stabilisation and modification techniques we deliver:
- Lime modification for wet cohesive soils
- Cement stabilisation and soil cement stabilisation
- Lime-cement blended binders for variable ground
- Hydraulic road binder stabilisation
- Capping layer construction to highway specification
- Working platforms and construction for piling rigs
- Slope stabilisation and shallow ground improvement
Industries and Sectors We Work With
Soil stabilisation has applications across nearly every construction sector, and SGE delivers in all of them. House builders use it to create workable platforms on cohesive sites that would otherwise require excavation and replacement. Highway contractors use it for capping construction and subgrade improvement on schemes that have to hit specification. Renewable energy developers, particularly on battery storage and solar projects, rely on stabilisation to build platforms that can carry concentrated container loads. Brownfield developers use it to make made ground into workable platforms instead of paying to export and import.
The common thread is that stabilisation produces a buildable result from material that was already on site. That keeps cost down by reducing import export, reduces lorry movements and supports the embodied carbon targets that are increasingly written into framework contracts.
Our Process and Delivery Method
1. Site investigation review and trial mix
We assess the in-situ material against the target specification and run trial mixes through UCKAS accredited laboratories. This confirms the binder type, application rate and curing requirements before production starts.
2. Method statement and programme
Method statements detail binder, mixing depth, compaction passes and curing. Programme is built around binder delivery, weather windows and follow-on trades.
3. Spreading and mixing
Binder is spread accurately using calibrated spreaders and mixed to specified depth using purpose-built stabilisation machines. Uniform mixing depth and rate are checked throughout production.
4. Compaction and finishing
Stabilised material is compacted to specification using appropriate roller passes for the binder and material type, then trimmed to the design level.
5. Curing and validation
Validation testing including CBR, NDM, MCV or other specified parameters is carried out after the required curing period. Results are issued in a clear report that ties back to the original specification or agreed material test plans.
Project Examples
Our soil stabilisation work spans housing schemes with wet cohesive subgrades, highway capping projects, renewable energy platform construction and brownfield regeneration sites. Recent examples include large-scale soil stabilisation at Alloa Midtown Phase 2 for BHC Ltd, platform stabilisation for battery storage and solar developments, and capping construction on residential schemes including Burleyfields in Stafford. Full project references are available through our Projects page.
Benefits of Working With SGE
- In-house laboratory for trial mixes and validation testing
- Specialist stabilisation plant including dedicated spreaders and mixers
- Experienced operators familiar with lime, cement and blended binders
- Reduced project cost compared with import and export of materials
- Lower carbon footprint through in-situ reuse of site material
- Single contractor responsibility from binder selection to validated handover
- Combined delivery with bulk earthworks and remediation where required
Frequently Asked Questions
What is the difference between soil stabilisation and soil modification?
Modification improves handling and reduces moisture, normally using lime. Stabilisation produces a designed, measurable increase in strength using cement or blended binders. Both are delivered in-situ rather than by replacing material.
When is soil stabilisation more cost-effective than import or export?
On most cohesive sites where the unsuitable material is more than a metre deep, stabilisation pays back compared with excavation, disposal and import of replacement material. It also reduces lorry movements and embodied carbon.
Do you carry out trial mixes before production?
Yes. We can assist with laboratory trial mixes through accredited UCKAS laboratories before full-scale work begins. This avoids the cost of finding out at production scale that a binder design needs to change.
What specifications do you work to?
We work to project specifications written by consulting engineers, to highway authority capping specifications, and to the project specific specification requirements.