Browsing by Author "Rosenthal, Gerald"

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    Geotechnical properties of carbonate soils with reference to an improved engineering classification
    (1988) Sterianos, Benjamin; Rosenthal, Gerald
    The engineering behaviour of carbonates differ substantially from quartz based soils. A review of the literature was undertaken in an attempt to identify relevant parameters which could provide the basis for an improved engineering classification. Carbonate content, cementation, crushability, particle size distribution and Atterberg limits were found to be relevant to engineering behaviour of carbonates, and should be included. The maximum obtainable void ratio (emax), which is related to the particle shape distribution, has been proposed as an additional index for carbonate sands. Results from direct shear tests showed that this parameter correlates well with crushability and compressibility. It is recommended that this parameter (emax) as determined in the test devised by Kolbuszewski (1948), should be adopted as an index property for classifying carbonate sands.
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    Lift forces on a sphere close to a boundary in oscillatory flow
    (1989) Bellamy, Martin Richard; Rosenthal, Gerald
    This dissertation investigates the lift forces acting on a single sphere close to a horizontal boundary under oscillatory flow conditions. The investigation relates to the role which lift plays in the mechanism of sediment transportation. The apparatus developed for the laboratory simulation consisted of a sphere mounted a different distances away from a horizontal inverted bed, which was oscillated sinusoidally in a stationary water flume.