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Small Strain Dynamic Properties of Silt-Clay Mixtures
Dynamic soil properties such as shear and compression wave velocities are essential for understanding the dynamic response of soils, which will govern the response of any infrastructure founded on or within the soil mass. Despite this, there are only few studies that systematically evaluate the influence of various basic soil properties on the dynamic soil behavior. In this study, twenty soil samples were prepared in the laboratory as mixtures of the montmorillonite with quartz (rock flour) or kaolinite with quartz to prepare soil samples at a wide range of consistency limits. Liquid limits and plasticity indices of the samples ranged from 8 to 486 and 4 to 431, respectively. The samples were used to conduct bender element tests to determine the shear wave velocities and compression wave velocities at the consolidation pressures of 25 kPa, 50 kPa, and 100 kPa. The impact of mineralogical composition and plasticity characteristics on the dynamic soil properties were evaluated. Consolidation pressure appeared to have a small to negligible influence on the shear and compressive wave velocities of both mixtures of kaolinite with quartz and montmorillonite with quartz. The compression and shear wave velocities of the samples decreased with an increase in the plasticity index of the samples. Greater reductions were observed in mixtures of kaolinite with quartz than in mixtures of montmorillonite with quartz. Unique relationships were developed between the shear and compression wave velocities with the plasticity index. These relationships were found to depend on the mineralogical composition of the sample.
Small Strain Dynamic Properties of Silt-Clay Mixtures
Dynamic soil properties such as shear and compression wave velocities are essential for understanding the dynamic response of soils, which will govern the response of any infrastructure founded on or within the soil mass. Despite this, there are only few studies that systematically evaluate the influence of various basic soil properties on the dynamic soil behavior. In this study, twenty soil samples were prepared in the laboratory as mixtures of the montmorillonite with quartz (rock flour) or kaolinite with quartz to prepare soil samples at a wide range of consistency limits. Liquid limits and plasticity indices of the samples ranged from 8 to 486 and 4 to 431, respectively. The samples were used to conduct bender element tests to determine the shear wave velocities and compression wave velocities at the consolidation pressures of 25 kPa, 50 kPa, and 100 kPa. The impact of mineralogical composition and plasticity characteristics on the dynamic soil properties were evaluated. Consolidation pressure appeared to have a small to negligible influence on the shear and compressive wave velocities of both mixtures of kaolinite with quartz and montmorillonite with quartz. The compression and shear wave velocities of the samples decreased with an increase in the plasticity index of the samples. Greater reductions were observed in mixtures of kaolinite with quartz than in mixtures of montmorillonite with quartz. Unique relationships were developed between the shear and compression wave velocities with the plasticity index. These relationships were found to depend on the mineralogical composition of the sample.
Small Strain Dynamic Properties of Silt-Clay Mixtures
Ajmera, Beena (author) / Tiwari, Binod (author) / Phan, Quoc-Hung (author)
Geo-Congress 2020 ; 2020 ; Minneapolis, Minnesota
Geo-Congress 2020 ; 190-197
2020-02-21
Conference paper
Electronic Resource
English
Small Strain Dynamic Properties of Silt-Clay Mixtures
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