Akademik Veri Yönetim Sistemi
Electronic Journal of Geotechnical Engineering, cilt.18 O, ss.3047-3059, 2013 (ESCI, Scopus)
The shrinkage limit of fine-grained soils may be of special importance in certain geotechnical applications. As in the other two consistency limit tests (LL and PL), several factors affect the results of a shrinkage limit obtained from the two most common testing techniques, the mercury and wax methods, of which extreme operator dependence is the most prominent. 120 soil samples were used as the material for the investigation. The four techniques used to determine the shrinkage limit were the mercury, wax, Casagrande and linear shrinkage tests; the two newer techniques employed were designated as the dimension and density and the reverse extrusion tests. Five of the six listed methods were applied to ten specimens of each sample, and the linear shrinkage was repeated only five times per sample. The results of each method -dimension and density, the reverse extrusion, Casagrande and linear shrinkage- were compared with those of the mercury and wax methods. The best estimates were obtained from the comparison between the dimension and density and the two standard techniques, namely the mercury and wax methods. The reverse extrusion test was also able to estimate the shrinkage limit with a reasonable degree of accuracy. Both new methods appear to be useful alternative tools for determining the shrinkage limit. © 2013, EJGE.