Browsing by Author "Schmidt, Selma"

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  • ItemOpen Access
    Data corresponding to paper: "Triaxial Compression of Sand‑Fines Mixtures at Low Confining Pressures" by Ullmann et al. (2025)
    (Technische Universität Dresden, 2026-01-21) Ullmann, Sebastian Pierre; Schmidt, Selma; Hartung, Felix; Herle, Ivo
    This data publication contains the data related to the scientific contribution "Triaxial Compression of Sand‑Fines Mixtures at Low Confining Pressures" by Ullmann et al. (2025) Abstract of the corresponding paper: A series of triaxial compression tests was performed on a natural sand-fines mixture under both drained and undrained conditions at initial confining pressures ranging from 20 to 300 kPa. The tests aimed to better understand the mechanical behaviour of the soil at low stress levels. Additionally, images of the soil fabric were taken using a μCT device, revealing that the fabric was characterised by the sand grains being fully embedded within the fine-grained matrix and that only few direct contacts between the sand grains existed. The results of the triaxial tests showed that the fabric of the sand-fines mixture significantly influenced the macroscopic properties of the specimens when compared to clean sands. In the drained triaxial tests, the dilatancy and friction angles showed minimal dependence on the confining pressure, even at pressures below 60 kPa. The undrained triaxial tests showed different response patterns in the development of excess pore water pressure. Tests starting from lower confining pressures resulted in a greater build-up of pore water pressure after reaching the phase transition line, whereas at higher confining pressures the soil exhibited lower excess pore water pressures.
  • ItemOpen Access
    Micro-CT data supporting the article: "Influence of the fine sand content on the fabric in binary mixtures"
    (Technische Universität Dresden, 2026-03-31) Schmidt, Selma; Löffler, Markus
    The data comprises the raw, reconstructed micro-CT images supporting the article: "Influence of the fine sand content on the fabric in binary mixtures". 8 specimens of binary mixtures of fine and coarse sand have been prepared with varying fine sand content. An observation window at the center of each specimen has been scanned with a voxel size of 6.22 μm for the specimens 01-04 and 6.18 μm for the specimens 05-08. Additionally, the entire specimen 05 has been scanned with a voxel size of 11.32 μm. Further information can be found in the corresponding article.