Pore distribution of water-saturated compacted clay using NMR relaxometry and freezing temperature depression; effects of density and salt concentration

摘要

The estimation of water population in water-saturated compacted clay was studied with H-1 NMR relaxometry and freezing point depression. The clay samples and saturated condition were Na-montmorillonite at 0.8 and 1.4 g/cm(3) saturated by three salt concentrations (deionized water, 0.1 mol/L and 1.0 mol/L). The water saturated compacted samples were prepared in PCTFE cylinder by immersed in the liquid under vacuum for 1 month. All NMR measurements were conducted using intact PCTFE vessel, which was possible to keep confinement condition during experiment.