ANALYSIS OF THE EFFECT OF THE COMPACTION PROCEDURE OF ASPHALT SPECIMENS WITH MARSHALL AND GYRATORY COMPACTOR ON THE VOLUMETRIC AND MECHANICAL PROPERTIES

摘要

The study is focused on evaluating the influence of compaction variables with the SuperpaveGyratory Compactor (SGC) in volumetric and mechanical properties of asphalt mixtures. At theRoad Research Laboratory of the UPC-BarcelonaTech specimens of continuous (AC16S) andgap-graded (BBTM11B) mixtures with 50/70 penetration bitumen were produced. Three verticalpressure levels, three angles of gyration and five compaction temperatures were used and theinfluence of these variables on the shear stress, density, air-void content and stiffness moduluswas analyzed. The stiffness modulus and densities obtained in samples produced with SGC andMarshall hammer at different temperatures were also compared. For the studied mixtures it wasshown that the variation of the temperature slightly affects the volumetric properties of themixtures and introduces a significant change in the stiffness modulus.