The role of physical pretreatments on the hydraulic conductivity of natural sodium bentonites

摘要

The role played by physical pretreatments applied to sodium bentonites, such as pre-hydration, pre-consolidation and pore water salt removal, has been analyzed in this technical note looking at the results of a series of hydraulic conductivity tests that have been carried out using both deionized water (DW) and a calcium chloride solution (CCS) as permeants. Moreover, the effect of the presence of needling across the bentonite layer has also been investigated.