Light Weight Deflectometer (LWD)

Dynatest introduced the world’s first portable LWD (Light Weight Deflectometer), as a new method to determine the E-modulus of un-bound materials in pavements. The LWD uses a load cell and geophones with the same accuracy as the FWD. 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. The LWD meets the ASTM 2583, the IAN73 (UK) standard, the Danish standard and the Italian standard for determining the modulus and compaction of a material.