Detection of Geogrids in Road Pavements Using Ground-Penetrating Radar (GPR): Experimental Study and Image Analysis

This study explores the efficient identification of geogrids in road pavements through ground-penetrating radar (GPR) and comprehensive laboratory experiments. Geogrids are crucial in enhancing pavement strength and durability, making their effective detection vital for maintenance and longevity. GPR, based on electromagnetic principles, offers a non-destructive and insightful method for evaluating pavement infrastructure. The literature review underscores the gap in studies specifically addressing geogrid detection using GPR in road pavements, motivating the current research. To fill this void, laboratory experiments were conducted, incorporating fiberglass geogrid into asphalt mixtures. The detailed methodology outlines the preparation, execution, and data acquisition using GPR, emphasizing careful consideration of antenna polarities. Results highlight the visual identification of geogrids using specific treatments on radargrams, demonstrating the effectiveness of GPR in detecting nuances not readily discernible in untreated images. Graphical representations bridge real-world geogrid depictions with radargram simulations, enhancing interpretability. The discussion interprets results, emphasizing the influence of geogrid type and GPR antenna position on detection accuracy. Fiberglass geogrid interference prompts considerations for dielectric properties, crucial for optimizing GPR configurations. Practical implications suggest advantages in detecting specific geogrid types. In conclusion, this study contributes nuanced insights to geogrid detection methodologies, guiding advancements in non-destructive testing for road pavements. The knowledge gained catalyzes innovation in geogrid applications and detection techniques, fostering improved infrastructure management practices.