stated that the air entry value and residual water content were observed to increase with the increase in clay content signifying an increase in water retention capacity.
This plot could be used as a key tool to estimate the matric suction for the unsaturated sand-clay mixture using measurements of electrical conductivity for the zones below air entry value. The measurements of electrical conductivity either at field or in the laboratory are always quicker and simple.
Parameter a is related to the inverse of air entry value and the n parameter is related to the pore size distribution .
Parameter [h.sub.b] is related to the air entry value of the soil.
Parameter [alpha] is related to the inverse of air entry value, the n parameter is related to the pore size distribution of the soil, and the m parameter is related to the asymmetry of the model.
Two basic parameters incorporated in Gardner's model are the air entry value (AEV) and pore size distribution, which are denoted as a and n, respectively.
This equation can be used directly to calculate the air entry value of the element.
Capillary pressure to start desaturation (air entry value) in the porous medium is assumed to be 0.3 MPa.
Here, the tensile strength does not add to the confining pressure and the air entry value. The irreversible opening of the discontinuity takes place above 2.5 MPa, while the sum of confining stress plus air entry value plus tensile strength gives: 1 + 0.3 + 0.5 = 1.8 MPa.