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Light Weight Deflectometer (LWD)

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Status: Implemented 


The Light Weight Deflectometer (LWD) is used for quality control of compaction and to validate the modulus of unbound layers in pavement structure, serving as an alternative to the Plate Load Test (PLT).


The LWD allows the contractor to ensure that all results meet the Design Surface Modulus with 90% confidence. The equipment delivers immediate and repeatable results, enabling on-site decisions to be made promptly. If tested areas do not meet design requirements, further compaction and re-testing would be conducted immediately to ensure no subbase or subgrade settlement.