DEVICE FOR DETERMINATION OF THE MODULUS OF ELASTICITY AND THICKNESS OF ASPHALT-CONCRETE LAYERS OF ROAD PAVEMENT

摘要

The invention is intended for non-destructive control of parameters of quality of monolithic layers of nonrigid pavements at construction and operation of highways. A device for determination of the elasticity modulus and thickness of asphalt-concrete layers of road pavement provides acceleration and simplification of the process of measurement of velocity of elastic surface waves and the process of processing the results of measurements as well, and makes it possible to use the device at field conditions of testing asphalt-concrete layers of road pavement due to that the device includes an electromagnetic solenoid as a pulse source of elastic surface waves, as sensors for registration of propagation of elastic surface waves there are piezoelectric vibro-accelerometers placed at given distances one from another, this provides effective registration of vertical vibrations of the surface of the asphalt-concrete road pavement at passage of waves with different frequencies, and the block for processing the results of measurements comprises a module of analog-digital converter, module for output of discrete signals and a computer with special program software.