Soil water retention curves of hydrate-bearing sediment, frozen soil, and unsaturated soil

Samples of hydrate-bearing sediment, frozen soil, and unsaturated soil were prepared using the same host porous medium, Ningming clay, primarily composed of montmorillonite. The soil water retention curves (SWRCs) for the different samples were obtained by measuring their matric suction (Pc) and gravimetric water content (w). For frozen soil, matric suction was calculated based on temperature (T), while for hydrate-bearing sediment, it was determined using the temperature depression (Tb - T). Overall, the three porous media exhibit similar water retention capacities. The Excel file provides the data from tests and calculations.