Consolidation properties of mixed transparent soils

Newby, Christopher (2016) Consolidation properties of mixed transparent soils. BEng dissertation, University of Portsmouth.

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    Abstract

    The development of image analysis technologies has enabled the modelling of the internal behaviour of transparent soils. Synthesised transparent soils having consolidation and strength properties which closely match those of natural soils is therefore vitally important as it allows modelling of behaviour and failure modes of those matched natural soils.
    The aim of this research is to formulate a transparent laboratory modelling material, which accurately simulates the consolidation properties of non-uniform natural soils, whilst maintaining transparent properties and to develop procedures for large scale modelling and analysis of transparent samples.
    6 sample mixes were used in this research; a non-mixed sample containing 0% fused silica and 5 mixed samples containing 6-10% fused silica by volume.
    Consolidation properties were determined through oedometer testing. Shear strength properties were determined from samples consolidated using a centrifuge by use of a hand vane. The shear strength for a single 10% sample consolidated on a large scale was determined by use of a hand vane also. Particle Image Velocimetry data was collected from the large scale sample under 1g consolidation pressure by use of a class 1 laser system, camera and use of PIV software.
    Transparency of mixed soils was found to be sufficient to perform analysis and obtain PIV data.
    It was determined that the consolidation properties of mixed transparent soils are comparable to those of non-mixed transparent soils. Compressibility of mixed soils is greater than that of nonmixed soil due to an increase in void ratio within the samples. There was an overall increase in shear strength properties in mixed samples with an increase in fused silica content compared with non-mixed samples.

    Item Type: Dissertation
    Departments/Research Groups: Faculty of Technology > School of Civil Engineering and Surveying
    Depositing User: Beth Atkins
    Date Deposited: 06 Sep 2016 13:35
    Last Modified: 06 Sep 2016 13:35
    URI: http://eprints.port.ac.uk/id/eprint/21759

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