Academic Journal
Effect of plasticity on fall cone testing of sand–clay mixtures.
| Τίτλος: | Effect of plasticity on fall cone testing of sand–clay mixtures. |
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| Συγγραφείς: | Yilboga, Esra1 (AUTHOR) yilbogaesra@gmail.com, Karakan, Eyyub2 (AUTHOR) eyyubkarakan@kilis.edu.tr, Yildiz, Ozgur3 (AUTHOR) ozgur.yildiz@yildiz.edu.tr, Cabalar, Ali Firat1 (AUTHOR) cabalar@gantep.edu.tr |
| Πηγή: | Acta Geotechnica. Sep2026, p1-20. 20p. |
| Θεματικοί όροι: | *Material plasticity, *Soil testing, *Geotechnical engineering, *Clay minerals, *Clay soils, *Soil compaction, *Random forest algorithms, *Shear strength |
| Γεωγραφικοί όροι: | Kahramanmaras (Türkiye) |
| Περίληψη: | This paper presents the effects of plasticity index on the fall cone testing of sand–clay mixtures, thereby providing insight into their geotechnical performance under different conditions. Two types of clay with different mineralogical composition were used in the experimental study, which are: (i) a low plasticity clay sample (PI = 11) quarried from the city center of Kahramanmaras, severely damaged by the 2023 Türkiye earthquakes, and (ii) a commercially sourced bentonite clay with high plasticity (PI = 98). Both clays were separately mixed with a well-graded sand, at the clay content varying from 0 to 100% in 10% increments, by dry weight. Standard compaction, Casagrande as well as fall cone tests were performed on the prepared specimens. The specimens behave one way up to a specific water content, and another beyond that threshold for the specimens prepared with both clay types; hence, a novel two-zone framework to analyze the fall cone testing results has been proposed for the first time. Furthermore, a random forest model was also developed to predict the undrained shear strength of the specimens. The model exhibited strong predictive performance by achieving a high coefficient of determination (R2 = 0.91) that indicates successful agreement between the predicted and actual values, along with a low root-mean-square error (RMSE) of 2.9071, reflecting its accuracy and reliability. [ABSTRACT FROM AUTHOR] |
| Βάση Δεδομένων: | Academic Search Index |
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