Road & Pavement Investigation
Understand pavement construction without unnecessary disruption.
Combine rapid asphalt spot measurements with configurable GPR profiling to investigate pavement construction, layer variation and subsurface conditions.
Focused asphalt-depth measurements.
Investigate variation along a survey line.
Target intrusive checks more effectively.
Select frequencies around the investigation.
Investigation Objectives
Start with the pavement question
The appropriate equipment and survey method depend on whether the requirement is a rapid layer-depth check, a continuous construction profile or a broader investigation of subsurface conditions.
What is the total bound-layer depth?
Obtain focused spot measurements to support assessment of asphalt footways and minor carriageways.
How does construction vary along the route?
Use profile-based GPR collection to identify changes in interfaces, thickness and pavement construction.
Are there subsurface anomalies?
Investigate reflections that may indicate buried features, construction changes or other areas requiring further assessment.
Where should intrusive checks be made?
Use non-destructive information to help position coring, excavation or other verification work more selectively.
Survey Methods
Two complementary approaches
Asphalt spot testing
e-Spott HF is designed for rapid, non-destructive spot measurement of total bound-layer depth on asphalt footways and minor carriageways.
- One-button field operation
- Reading completed in under 20 seconds
- Results stored to removable SD card
- GPS position recorded with the measurement
- Supports focused assessment and targeted coring
Professional GPR surveying
GroundVue systems provide configurable frequencies, channels and deployment formats for collecting continuous radar information across road and pavement investigations.
- Continuous survey profiles
- Multiple frequency options
- Investigation of layer interfaces and variation
- Configurable antenna and channel arrangements
- Suitable for specialist survey workflows
e-Spott HF
Rapid total bound-layer depth measurements
e-Spott HF provides a focused workflow for collecting individual asphalt depth readings without requiring a conventional radargram survey for every measurement.
Typical reading cycle
Designed for rapid individual spot measurements in the field.
Stated detection range
Intended for total bound-layer depth measurement within this range.
Stated average spot accuracy
Subject to discernible interfaces, material conditions and correct use.
Position and result storage
Measurement results and coordinates can be retained for later review.
Investigation Workflow
Match the collection method to the decision
Effective pavement investigation starts by defining the required information before selecting the instrument, survey spacing and validation method.
Define the question
Establish whether the requirement is a spot depth, a continuous layer profile, a search for anomalies or support for intrusive verification.
Collect suitable data
Use e-Spott HF for focused bound-layer measurements or a configured GroundVue system for profile-based investigation.
Correlate and verify
Review the survey information alongside drawings, construction records, visual observations and targeted intrusive evidence where required.
Recommended Systems
Equipment for different levels of pavement investigation
Product selection depends on whether the investigation requires individual depth readings, complementary multi-frequency profiles or a fully configurable professional survey platform.
Asphalt spot testing
e-Spott HF
For rapid spot measurement of total bound-layer depth on asphalt footways and minor carriageways.
- Under 20 seconds per reading
- 35–300 mm stated detection range
- GPS-positioned result storage
Multi-frequency profiling
GroundVue TriVue
An integrated three-frequency system for simultaneously collecting complementary information at 250, 500 and 1000 MHz.
- Three independent channels
- Simultaneous multi-frequency data
- Road, utility and environmental investigation
Configurable professional GPR
GroundVue GV3
A modular controller and antenna platform for specialist pavement surveys requiring configurable channels, frequencies and deployment.
- One to eight-channel controller options
- Broad antenna selection
- Suitable for custom survey configurations
Interpretation & Validation
Non-destructive information must be used in context
GPR performance is influenced by construction materials, moisture, interface contrast, surface condition, survey configuration and the required target depth.
Important survey considerations
- A radar reflection indicates an electromagnetic contrast; it does not by itself identify the material or cause.
- Weak or gradual layer boundaries may not provide a clear interface for automatic depth measurement.
- Spot measurements do not replace a continuous profile where variation across the route must be understood.
- Survey results should be correlated with available drawings, construction records, cores or other site evidence where required.
- Product and antenna selection should be based on the expected construction, required depth, resolution and site access.
Discuss Your Investigation
Select the road survey method around the information required
Tell us whether the requirement is asphalt spot testing, continuous pavement profiling, anomaly investigation or a specialist multi-frequency survey.