Abstract Manager

Overlay applications are a widely used method for pavement rehabilitation, particularly when the underlying structure retains sufficient integrity. However, reflective cracking remains a significant challenge, where existing cracks propagate into the overlay due to stress and strain from traffic loads and temperature fluctuations. To mitigate this issue, geosynthetic interlayer systems have been employed, yet their mechanical behavior requires further investigation to optimize their effectiveness in reinforced pavement sections.

This study examines the influence of temperature, loading rate, and reinforcement position in the asphalt interface using the Crack Widening Device. Results confirm that geosynthetic reinforcement significantly enhances pavement performance compared to unreinforced conditions, with optimal effectiveness observed at temperatures around 25 ± 2°C. The placement of the geotextile at one-third from the bottom of the sample provided superior performance in most cases compared to placements at two-thirds from the bottom. Additionally, among different reinforcement types, the geo-composite GV exhibited the lowest maximum force values at room temperature, while geotextiles generally outperformed other reinforcements in both force resistance and displacement across most configurations. At high temperatures, PF reinforcement demonstrated increased maximum failure forces at a higher loading rate (5 mm/min), albeit with reduced displacement. Glasphalt GV showed greater displacement at elevated loading rates but did not significantly impact maximum forces, while Carbophalt GB exhibited minimal responsiveness to loading variations.

Beyond mechanical performance, an economic analysis and a life cycle assessment (LCA) were conducted to evaluate the cost-effectiveness and environmental benefits of geosynthetic-reinforced pavement systems. The findings emphasize that selecting the appropriate reinforcement type, placement, and loading conditions is crucial for optimizing pavement durability and sustainability while minimizing maintenance costs and environmental impacts.