Ruggedly Designed Tool for Checking Trench Re-instatement, Soil Strength & Establishing Clegg Hammer Modulus (CHM)The 20Kg Clegg Impact Soil Tester manufactured by SDi is pictured on the right. This model is designed for use on hard materials such as those employed in roadworks.Here the tester may be used in obtaining data for estimating the traffic carrying potential of lightly surfaced low traffic roads.The Clegg Test involves dropping the hammer mass 5 times at each location and the 4th reading is used as the measurement of interest.The Surface Modulus of the flexible pavement is measured in terms of Mega Pascals and calculated as per Dr Baden Clegg’s original work ‘in the field’. The measurement Clegg Modulus or CHM is displayed on the readout unit after the 5th hammer drop. Time and date stamped data logging of site tests and wireless transfer to PC is provided by the CIST/883 Readout Unit.The hammer has a mass of 20Kg and a diameter of 130 mm. To simplify carriage and handling, the Guide Tube tube is fitted with wheels, making it into a pull-along cart.If required an optional 10Kg hammer mass can be provided instead of the 20Kg hammer.The Readout is fixed to an adjustable mount that can be moved in height and rotation to suit the user.Specification and Ordering Code
