Evaluation of Fatigue Behavior of Asphalt Layers Containing Nanosilica Modified Tack Coat

Generally, the maintenance of asphalt pavements contributes a significant portion national capital countries. Rutting and cracking cause extensive damage to pavements, although fatigue cracks are more common in pavements. Adhesion bonding between layers among factors that affect durability pavement play major function maintaining integrity pavement. On other hand, using nanomaterials is regarded as one options improve properties performance bitumen. Therefore, this study aimed evaluate behavior containing nanosilica modified tack coat (NSMTC). To aim, it was used four-point bending (4 PB) beam test. The loading semisinusoidal type with 10 Hz frequency, without rest, at temperature 20°C. controlled strain state (at three levels 400, 550, 700 ??) implemented. results revealed increased life specimen NSMTC. At different (i.e., ??), beams NSMTC by 18, 15, 57%, respectively. Furthermore, cumulative dissipated energy specimens 37, 42, 60% compared unmodified (UMTC) for ??,