Evaluation of the Effect of Interlayer Bonding Condition on the Deterioration of Asphalt Pavement

Abstract

In this study, to investigate the effect of interlayer bonding condition on the deterioration of asphalt pavement, we conducted numerical analysis based on multi-layer elastic theory, verification of numerical analysis results by experiments on a full-scale test track, and comparison of the progress of deterioration based on accelerated loading tests conducted on the test pavement. Firstly, the analysis indicated that stronger tensile strain could occur on the upper side of the interlayer when the interlayer bonding weakens. Furthermore, the test pavement simulating interlayer debonding showed the same strain tendency as the analysis. These results suggest that if the interlayer debonding continues, the pavement may suffer early fatigue failure. On the other hand, there are some results that are not consistent with those of the analysis, such as the magnitude of deflection in the test pavement; thus, further investigation is required. Furthermore, because of the accelerated loading on the test pavement, the sections where the layers were debonded immediately after construction became bonded. Since the deflection of the test pavement did not change significantly from that immediately after construction, and no conspicuous damage such as cracks was observed on the road surface, it is considered necessary to continue follow-up surveys.

Three-dimensional orthorectified simulation and ground penetrating radar detection of interlayer bonding condition in asphalt pavements

“…Insufficient bonding between the semi-rigid base and asphalt surface leads to an increased occurrence of reflective cracks in asphalt pavements, ultimately diminishing their service life [6][7][8]. Previous studies have shown that weakened interlayer bonding results in heightened tensile strain in the upper part of the interlayer, leading to a substantial reduction in the fatigue life of the asphalt pavement, up to 75.6% [9][10][11]. Furthermore, pavement testing has revealed a nonlinear increase in interface stress and strain response between the asphalt layer and the base with rising loads [12].…”

Analysis of Interlayer Crack Propagation and Strength Prediction of Steel Bridge Deck Asphalt Pavement Based on Extended Finite Element Method and Cohesive Zone Model (XFEM–CZM) Coupling

“…They discovered that epoxy asphalt concrete exhibits notable watertightness, protecting steel plate interfaces from corrosion and ensuring robust bonding performance. Yuya and others [21] analyzed the effect of interlayer bonding on the deterioration of asphalt pavements and clarified the importance of interlayer bonding.…”