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Make recommendations for engineering approaches that enables the use of…
Make recommendations for engineering approaches that enables the use of heterogeneous and lightly polluted secondary materials to construct resilient geological barriers
- Material evaluation (advanced tests)
- Determine representative specimen for LCSCs, PFR and DCC
- Representative specimen size to determine compaction and hydraulic properties of heterogeneous fine-grained materials
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- Material screening (routine tests)
- Quantification of heterogeneity
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- Verification of field hydraulic conductivity
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- Compaction quality control
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3d. Choice of method for measurements, and frequency of measurements necessary for heterogeneous soils.
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Statistical analyses
RQ: How large area must be permeated to determine a K_F for LCSCs that is within an error margin of 2 times higher/lower than the hydraulic conductivity measured with lysimeters (4x4m)?
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RQ: What lift thickness is optimal and what number of lifts is required to ensure good agreement between the lab (best-case if a representative sample is chosen) hydraulic conductivity and field hydraulic conductivity.
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Statistical analyses
Literature review
- Industry by-products and surplus materials in compacted soil liners and covers
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Permeability testing
- Representative specimen size to determine compaction and hydraulic properties of heterogeneous fine-grained materials
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Permeability testing
RQ: How many freeze-thaw and drying-wetting cycles may compacted lime- and cement-stabilized clays normally having K_F < 1e-9 m/s sustain before K_F > 1e-9 m/s.
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Proctor testing
RQ: What specimen diameter is required to ensure that the lime- and cement-stabilized clays generated from traditional stabilisation practices are within an error margin of 3 times higher than hydraulic conductivity measured on specimens with a twice as large diameter?
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Option. 1+2: Laboratory evaluations of a heterogeneous excavated stabilised clay and a lightly polluted filter cake from excavation masses for use as compacted soil liners and covers
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MSc bonus paper. On the compaction, shear strength, hydraulic conductivity and leaching properties of excavated stabilised clays with varying binder type and quantity
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