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The behaviour of naturally occurring geological materials such as clay and sand depends on many factors. For example, stresses, strains, previous stress history, mineralogy and the depositional environment all contribute in some degree to a characteristic that all natural soils share, namely ''structure''. The structure of clay, or more generally, the microstructure of microscopically sized clay mineral...
Triaxial and oedometer tests have examined how freezing–thawing (FT) and drying–wetting (DW) affect the hydraulic conductivity of a natural plastic clay. Because the clay was expansive, FT and DW in the laboratory produced only one order of magnitude increase in hydraulic conductivity above the ‘undisturbed’ value when permeated with water. Permeation with sodium carbonate or dimethyl sulfoxide reduced...
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