Evaluation of Interface Bond Strength of Geosynthetic Reinforced Pavement Layers

The geosynthetic reinforcements are often provided to reduce the rehabilitation cost and to improve the performance of the pavements. With the introduction of various types of commercially available geosynthetics in pavements, along with the improvement of pavement condition against the traffic wheel loads, there is also a disadvantage. The disadvantage is that the geosynthetic interlayer used often tends to reduce the bonding between the pavement layers, and this further accelerates the various types of failure mechanisms in the pavement.

In this study, the evaluation of interface bond strength between the pavement layers is done. The interface bond strength between the granular base layer and the asphalt surface layer with and without geosynthetic reinforcement is determined using shear mechanism. The geosynthetic interlayers used in the current study are geogrids and a geo-jute mat. The bond strength values against the various interlayers are determined and computed.