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The basic principle behind the Clegg Impact Soil Tester is to obtain a measurement of the deceleration of a free falling mass (hammer) from a set height onto a surface under the device. The impact of the hammer produces an electrical pulse, which is converted into a Clegg Impact Value (CIV).
Four successive blows of the hammer on the same spot constitues one test with the peak CIV output to the digital display. The CIV is displayed in units of tens of gravities. This value correlates to the California Bearing Ratio, Texas Class Number, Elastic Modulus, and PSI. Reference ASTM test methods D5874 and F1702.
The Clegg offers the convenience of rapidly scanning compaction variation over large areas. In research studies, 250 tests were performed with the Clegg in a half-day.
|The Clegg is constructed to be extremely durable and easy to operate. The hammer has a hardened strike face, and comes in weights of 0.5 kg, 2.25 kg, 4.5 kg, and 20 kg. The guide tube is metal and will give you years of reliable, accurate service. The control box features a digital display and is powered by a standard 9V battery. During operation, the control box may be hand held or mounted to the guide tube.|
|Simple and quick test procedure|
The test procedure is very rapid and can easily be performed by site personnel with minimal training. Each test can be completed in less than 30 sec. The results are immediate.
|The Clegg may be transported and operated by one person, allowing for low cost, rapid field and laboratory testing and direct readout of the test results. The Clegg can test a full range of soil and stone as encountered in the construction of flexible pavement and earthworks. It is useful for quickly checking variations during construction and monitoring changes over time due to seasonal environmental changes or road traffic as well as testing natural and "as constructed" conditins. The Clegg can test a full range of natural and artificial athletic surfaces where hardness/impact characterisstics need to be controlled for safety or playability.|
|LA95048A-0||0.5 kg Clegg, for soft turf, sans and golf greens|
|LA95049A-0||2.25 kg Clegg, for natural or artificial turf (football, baseball, and soccer fields - playgrounds, horse tracks)|
|LA95050A-0||4.5 kg Clegg, for preconstructed soils, trench reinstatement, bell holes, foundations|
|LA95056A-0||20kg Clegg, for flexible pavement, aggregate road beds, trench reinstatement, bell holes, foundations|