The apparatus comprises of:
The device gives an indication of deformation, bearing capacity and compaction, and can calculate a surface modulus (MPa) value based on the force required to generate a given deflection (mm) for that soil type. Surface modulus is the most accurate and independent means for judging deformation (stiffness) and, thus, a material’s level of compaction.
By understanding the pulse shape/pattern along with site observations from each test, the LWD can provide an indication of poor compaction and/if excessive water is present within the material.
A CBR (California Bearing Ratio) value can be calculated using the mean surface modulus.
Based on the static plate load test requiring a load vehicle, the LWD provides a simple, fast and repeatable test providing an accurate assessment of compaction parameters and along with its integrated GPS interface it records the coordinates of each test location.
The benefits using the portable device include:
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