An experimental study that evaluated the feasibility of applying a twin-probe gamma-ray
gauge for density measurements of cylindrical bituminous specimens is described. Major
considerations related to the operational features of the gauge and the characteristics of the
composite structure of bituminous mixtures are highlighted. Three bituminous mix types--
namely, sand asphalt, dense-graded mix, and open-graded mix--were included. The
measurement precision and accuracy characteristics of the gauge with respect to the …

An experimentnl tudy lhat evaluated the feasibility of applying a twin-probe gamma-ray
gauge for density mcasuremems of cylindrical bi tuminou specimens is described. Major
considerations related ro the operational features of the gauge and the characteri ti o [the
comp ite tructure of bituminous mixtures are highlighted. Three bituminous mix types-
namely, sand asphalt, dense-graded mix, and open-graded mix-were included. The
measurement precision and accuracy characteri ti· of the gauge with re peel to the different …