Some engineering properties of mixed soils with various pore fluids

This thesis presents an extensive series of experimental works conducted on different shape and size of sand saturated with different viscose pore fluids. It is aimed to investigate the effects of shape, size of sand particles, as well as the effects of different chemical viscose pore fluids on the strength properties of sand. On the other hand sand- clay mixtures were experimentally tested to evaluate the effects of clay content in various mix ratios on shear strength and compression behavior of the soils. In the study, two series of experiments have been performed. Direct shear box tests were performed on various grain sizes of angular and rounded sand in a loose state, saturated with water, petrol or gasoline. It was found that shear strength of the sands decrease as the viscosity of fluids increase. From the experimental investigations on the effects of both shape and size of the sands, it was found that an increase in angularity of sand grains causes an increase in peak friction angle, and that the particle size was found to be effective on the stress?strain relationships. Oedometer testing machine were performed on samples of clean sand, and sand homogeneously mixed with clay at different mix ratios of 5% up to 30%. The samples tested were saturated with water, petrol or gasoline. It was found that the compression behavior of mixed soils was increased with increasing clay content.Keywords: sand, sand? clay mixture, fluids, shape, size, shear strength, compression.