Discrete element modelling of hot mix asphalt complex modulus using realistic aggregate shapes

To assess the mechanical response under traffic of asphalt mixtures, a typical practice is to perform complex modulus test. In this work, test reproduced numerically for an mixture by 3D simulations carried out with LMGC90 code. A viscoelastic contact law used handle interaction between particles irregular shapes. The numerical aggregates were generated using particle size distribution (PSD), flakiness index (FI), and statistic data actual aggregates, without imaging techniques. Experimental testing campaigns conducted on trapezoidal samples in two-point bending (2PB) configuration. model was able reproduce performances obtained during experimental tests, regarding properties material. influence shape considering aggregate analysed.