Lightweight Deflectometer Test
Rapid in-situ stiffness testing for sub-base layers
About This Service
CTSL provides professional Lightweight Deflectometer (LWD) testing services to assess the stiffness and compaction quality of subgrades, unbound layers and ground materials.
As a fast and reliable in-situ ground testing method, LWD testing helps verify whether ground conditions meet project requirements and are suitable to support construction loads.
What Is Lightweight Deflectometer Testing?
LWD testing is an in-situ test used to measure the deformation response and stiffness of ground materials under a dynamic load, also providing an estimated CBR %. The test involves applying a controlled load through a circular plate and measuring resulting deflection, providing data to assess compaction quality and bearing performance. It is widely used as a rapid alternative or complement to other ground verification methods.
Why LWD Testing Matters
- Verify compaction quality
- Assess subgrade stiffness
- Support quality assurance and compliance checks
- Identify weak areas before construction progresses
- Reduce risk associated with ground performance issues
- Provide confidence in earthworks and pavement layers
Our Testing Process
Our technicians carry out Lightweight Deflectometer testing using calibrated equipment and recognised procedures to deliver accurate, dependable results. Testing is carried out in accordance with recognised standards where applicable, supporting reliable and standards-compliant results.
Applications
- Subgrade verification
- Earthworks and compaction control
- Roads and pavement construction
- Infrastructure projects
- Ground improvement verification
- Development and remediation works
Compliance: UKAS Accredited — IAN73/06