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Pavement deterioration poses multifaceted challenges, encompassing safety hazards, operational disruptions, and escalating maintenance costs. A significant contributing factor to this issue lies in the inadequate assessment of subgrade materials. This study focuses on investigating the geotechnical variables influencing pavement degradation along the Ikare-Arigidi Road in Ondo State, Nigeria. Through the analysis of California Bearing Ratio (CBR) values, segments such as CH.4+500RHS and CH.8+500RHS are identified as potential weak points, exhibiting notably low CBR values of 1.920. Moreover, moisture content and Atterberg limits emerge as critical factors affecting pavement stability, with section CH.6+500LHS demonstrating exceptional stability characteristics. The AASHTO soil classification system further elucidates variations in soil quality, highlighting segments classified as A-2-4 (CH.4+500RHS, CH.8+500RHS) as potentially having poorer soil conditions compared to A-6 sections. Consequently, segments such as CH.4+500RHS and CH.8+500RHS are anticipated to present challenges, while sections including CH.0+500RHS, CH.2+500LHS, CH.10+500LHS, and CH.12+500RHS exhibit potential for stability. By carefully considering these findings, targeted interventions can be implemented to effectively mitigate pavement degradation hazards. This may involve implementing appropriate soil stabilization measures, optimizing pavement design parameters, and prioritizing maintenance efforts in vulnerable segments. A comprehensive understanding of the geotechnical factors influencing pavement degradation is essential for devising sustainable strategies to enhance roadway performance and ensure the safety and longevity of transportation infrastructure.
Rowland Adewumi (Mon,) studied this question.