The Dynatest Light Weight Deflectometer (LWD) is a portable version of the Falling Weight Deflectometer (FWD).
The Light Weight Deflectometer uses a load cell and geophones with the same accuracy as the Falling Weight Deflectometer. The LWD can be used to test thin asphaltic pavements, recycled materials bound with foamed bitumen and directly test the unbound subbase and subgrade. The output from the LWD can be used to calculate the strength of multiple pavement layers.
1. Modulus output at time of test 2. Assessment of both the compaction and stiffness of material with the same unit 3. Quality control of the subbase layers and subgrade before an overlay is applied 4. Testing of trench restorations to reduce the chance of settlement over time
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