Its a new Emerging way in India as well as worldwide used for quality check of pavemnents as its a non-destructive test and reliable too. it make use of Radar Technology.

1. OPTIMISING THE USE OF GROUND
PENETRATING RADAR (GPR) FOR URBAN
ROAD INVESTIGATIONS
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Knowledge
(http://upload.wikimedia.org/wikipedia/commons/2/29/Ground_Penetrating_Radar_in_use.jpg)

2. Ground-Penetrating Radar (GPR)
Capabilities of GPR
• Layer thicknesses
• Void location
• Stripping in asphalt layers
• Presence of moisture
• Detection/locate subsurface anomalies
GPR contributes to the structural assessment of pavements
• Predict pavement performance
• Determine upgrade requirements
• Prevent unforeseen pavement failures
GPR is non-destructive
• Quicker results
• Fewer delays and interference IINFRASENSE, IInc..

3. OLD TECHINQUE OF ROAD INVESTIGATION
Trial pit method :

4. GPR FOR ROAD INVESTIGATION

5. GPR Equipment
• Data acquisition and control systems
• GPR antennas
– Air Coupled
– Ground Coupled

6. Current Horn Antennas
1 GHz Horns 2 GHz Horns

7. Ground-Coupled Antennas
1.5 GHz 500 MHz

8. Sample Graphic GPR Data
Pavement Surface
distance
Asphalt
Base
Time/depth

9. Sample Processed Graphic Data
on Asphalt Pavement
Pavement Surface
Asphalt
Base

10. Linear Plot of Pavement Layer
Thickness