TBTHWD is with heavy loading capacity compare with TBTFWD, this machine is able to loading greater stress so as to simulate the loading of aircraft landing which make it’s mainly used for airport; This machine is also one of the most advanced non-destructive structure testing equipment for road surface strength, to measure dynamic deflection of road surface and calculate the rebound modulus of road surface.

TBTHWD, is to apply a known amount of stress to the pavement and then record the deflections produced due to

the impact. Ambient temperature and pavement surface temperature are automatically measured by the equipment while asphalt temperature is measured manually. With required interval of points, the geophones are placed on the geophone beam, to get the deflection value when force loaded, and on the data acquisition software you can find these values and see the deflection basin.