Impact of the testing methods on physical properties of high plastic clay
Impact of the testing methods on physical properties of high plastic clay
Geotechnical properties vary locally, and there are uncertainties in the parameter interpretation and in determining characteristic and representative values for geotechnical design. The impact of the testing methods on the intrinsic properties of high plastic clays is analysed in the paper. The laboratory tests for determining the liquid and plastic limits are by far the most widely used index tests and are often adopted to assess the mechanical behaviour of clay. The laboratory investigation results for determining liquid limits using the fall-cone method and method based on Casagrande- type devices were analysed. The density of the soil particles was determined by the pycnometer method by fluid displacement and the pycnometer method by gas displacement. Helium was used as the measurement gas. Test samples of fine-grained soils were taken on five bentonite deposits in the Western Carpathians, Slovakia. Chemical analyses confirmed geotechnical evaluations of fine-grained soil properties. Tests were performed on 15 samples of very high plastic and extremely high plastic clays. Significant differences were observed based on the laboratory method used.
Jana Frankovska; M. Brcek; J. Brcekova
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
A - New developments on structural design
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