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Abstract. Exploring the reflective crack resistance of geosynthetic-reinforced asphalt concrete (AC) is the core focus of this paper, addressing a vital aspect of pavement longevity under fatigue loading. Reflective cracking, primarily induced by traffic and thermal loads, is a predominant failure mechanism in pavements. The current study quantifies the crack resistance capacity of geosynthetic-reinforced AC using a modified four-point beam fatigue test, namely the Notched Beam Fatigue Test (NBFT). This method evaluates the endurance of reinforced AC to repeated load cycles before failure, providing a tangible measure of crack resistance. The failure criterion in laboratory asphalt fatigue testing is pivotal; the methodology focuses on simple measurements such as load and displacement, deliberately avoiding reliance on visual crack observation and advanced techniques like Digital Image Correlation (DIC). Nevertheless, correlating traditional failure criteria with DIC results is integral to the study, aiming to enhance the predictability of field performance and assist in paving design decisions. A comprehensive explanation of the reflective cracking mechanism, including the implications of different failure modes during testing, is provided. This research contributes to understanding geosynthetic-reinforced AC behavior under real-world loading conditions, offering valuable insights for pavement design and maintenance strategies.
