Laboratory evaluation of B \rm & C small-plate light falling weight deflectometer

Abstract

A new Light Falling Weight Deflectometer has been used in Hungary for a couple of years now. The B \rm & C Small-plate Light Falling Weight Deflectometer developed by Andreas Ltd. has been used in the quality control process of subsoil, embankment and subgrade layers in road and railroad constructions. Apart from measuring the dynamic modulus, the device can determine the dynamic compaction of the tested layer based on a new theory. First results of the laboratory testing program carried out in the laboratory of the Department of Highway and Railway Engineering are presented in this paper. Detailed tests have been finished to determine the correlation to static and other dynamic moduli such as Light-Drop Weight Tester and to compare the measured dynamic compaction values to the values aquired by conventional soil sampling method.