Comparative Analysis of Liquid Limit Between Cone Penetration and Casagrande Method

Abstract

Comprehending the liquid limit of soils is crucial as it provides essential information on their plasticity and engineering behavior, influencing decisions in geotechnical engineering and construction projects. This thesis investigates the distinctions in liquid limits between the cone penetration method and the Casagrande approach. The study aims to compare the results obtained from these two methods in assessing the liquid limits of fine-grained soils, specifically clays and silty soils. Samples were collected from various locations in Bangladesh to conduct the tests. The findings reveal that the Casagrande method consistently yielded lower liquid limit values compared to the cone penetration method. Statistical analysis indicated minimal variation between the two methods in most cases, although notable discrepancies were observed. Overall, the cone penetration method tended to provide higher liquid limit values than the Casagrande method. These results underscore the importance of methodological choice in accurately assessing soil behavior, particularly in geotechnical engineering applications.