Optimisation and field assessment of poroelastic wearing course bond quality

Compared to typical asphalt mixtures, poroelastic mixtures are characterised by high porosity and flexibility, which desirable for traffic noise reduction. However, the same properties increase risk of debonding from lower layer, is a significant source premature damage. The study investigates factors – tack coat agent, type texture layer have greatest impact on interlayer bonding quality. From 27 variants interface bond techniques investigated in laboratory, 8 were selected constructed two full-scale test sections. Monotonic direct shear loading cyclic tests with normal force used this purpose. indicated that softer bitumen milled improves However appropriate laying compaction has major influence. Poroelastic much more sensitive technological imperfections than standard mixtures.