Salinity effect on the compaction behaviour, matric suction, stiffness and microstructure of a silty soil

To better understand the salinity effect on compaction behaviour of soil, standard Proctor test was conducted soil samples with different salinities. Matric suction and small-strain shear modulus, Gmax, were determined pore size distribution also investigated statically compacted at water contents. Results showed that decrease from initial value 2.1‰ (g salt/kg dry soil) to zero, maximum density increased optimum content decreased, whereas there no significant change increase 6.76‰. Interestingly, it observed Gmax decreased when zero kept almost constant 6.76‰, for similar matric state wet side whose suctions slightly due difference in remoulded content. Furthermore, side. The exhibited bi-modal characteristics two populations micro- macro-pores not only state, but those Further examination modal micro-pores shifted lower values higher saline compared without salt.