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Dr Baden Clegg Impact Soil Tester 

Wherever, whenever there is evaluation or construction of earthworks, road works or airstrips, the Clegg Impact Soil Tester offers quick, useful and convenient soil strength / stiffness and uniformity testing. 

For more information on the various Non Destructive Impact Testing
Please click link to the print friendly pdf version.
with compliments to Dr. Baden Clegg Pty Ltd for providing information on the different types Clegg Impact Hammers

Irrespective of meeting a density specification for roadworks* and trench reinstatement, etc, insufficient strength / stiffness can lead to failure, typically if the material is too wet prior to opening to traffic or sealing.
One of the uses of the Clegg Hammer is to monitor the improvement in strength / stiffness through drying out so that a certain minimum Clegg value is obtained in order to help prevent such failures as a result of too much moisture, be it residual moisture from the compaction process, flooding, precipitation or groundwater – where, for example, undetected inflow from the shoulders or underground springs can lead to serious problems.
The rapid and simple nature of making Clegg Impact Tests allows for large areas to be scanned rapidly by one person. The portable nature of the Clegg Impact Soil Tester allows for testing in remote or difficult to access areas.
The non-destructive nature of the method obviates driving rods down into a finished layer which could lead to potholing.
GSR Laser Tools is authorised and qualified to perform Service and Calibration of various Clegg Hammers.
The main unit to calibrate Clegg Hammers is the "Dynamic Calibrator".
Dynamic Calibration Unit consists of a NATA certified load cell with output scale displayed in tens of gravities peak deceleration (clegg units), with Standard Red Polyurethane Check Ring as interface between Clegg Hammer and load cell.
GSR Laser Tools / Geodetic Supply is the Authorised Distributor & Service Centre of the Clegg Impact Soil Tester
Click here for the Authorisation Statement issued by Dr. Baden Clegg Pty Ltd 
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  • The 4.5kg Clegg Impact Soil Tester with wireless Bluetooth provides an easy and straight forward means for measuring and controlling soil strength and consolidation levels during trench re-instatement.The readout is attached to the guide tube and the displayed reading is viewed from the top during use. 
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  • Clegg Impact Soil Tester 20Kg. For testing of flexible pavements from on top of the seal coat of heavily sealed roads. Also available Clegg 4.5Kg Soil Impact Tester.

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