deflectometer

The physical properties of a stretch of pavement can be tested using a falling weight deflectometer.

Another example is the use of a falling weight deflectometer (FWD) to non-destructively test existing pavements.

A falling weight deflectometer (FWD) is a testing device used by civil engineers to evaluate the physical properties of pavement.

Light Weight Deflectometer (LWD), used primarily to test insitu base and subgrade moduli during construction.

The load-bearing strength of subgrade is measured by California Bearing Ratio (CBR) test, falling weight deflectometer backcalculations and other methods.

A Light Weight Deflectometer (LWD) is a portable falling weight deflectometer.

A Heavy Weight Deflectometer (HWD) is a falling weight deflectometer that uses higher loads, used primarily for testing airport pavements.

A Rolling Weight Deflectometer (RWD) is a deflectometer that can gather data at a much higher speed (as high as 55 mph) than the FWD.