The Clegg offers a rapid, simple, and relatively inexpensive assessment of the strength and stiffness properties of a variety of soils, aggregates, and synthetic materials.
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 test result reflects and responds to characteristics that influence strength. Such influences include material type, grading, layer thickness, density, moisture condition, and possibly the condition of the underlying layer.
The Clegg Impact Tester is a consists of a drop hammer and tablet-based app. When the hammer strikes the soil surface, a precision accelerometer mounted on the hammer feeds its output to a Control Unit, which sends a wireless score to the tablet. A drop or sequence of drops of the hammer constitutes one test called a Clegg Impact Test (CIT). The CIT may be used to observe changes in strength/stiffness for a material with the changes in compactive effort, density, and moisture content.
Results can be displayed in Gravities(G), CIT (Clegg Impact Test) and CBR (California Bearing Ratio).
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