-In this paper, we use the unequal radius modified Gouy-Chapman theory to evaluate the effect of the ionic size of the electrolyte on the swelling pressures (H) in different clay systems immersed in electrolytic solutions. First the model is applied to a l:l electrolyte to show that the coion size is only important at surface charge densities much lower than those found in typical clay systems....

The mechanical properties of non-vulcanized natural rubber and dialyzed natural rubber-clay nanocomposites have been studied by uniaxial deformations to evaluate the reinforcement efficiency of the clay. We show that while non-rubber molecules contribute to auto-reinforcement, removal of these molecules improves significantly the performance of clay as reinforcement agent. These mechanical prop...

[1] To understand the aqueous history of Mars, it is critical to constrain the alteration mineralogy of the Martian surface. Previously published analyses of thermal infrared (l = 6–25 mm) remote sensing data of Mars suggest that dark regions have 15–20% clay minerals. However, near-infrared (l = 1–3 mm) spectral results generally do not identify widespread clay minerals. Thermal infrared detec...

-The specific surface area, S, of a clay is commonly measured by the adsorption of ethylene glycol monoethyl ether (EGME); however, this method can be tedious and time consuming, especially if the clay is saturated with a monovalent, highly hydrated cation. An alternative method for measuring S was developed involving infrared internal reflectance spectroscopy. This method is based on the disco...

Herewith we present a multi-phase model for debris flows, of which the flow body is supposed to be composed water, fine sediment (clay/silt) and grains. The rheology flows varies due dynamical variation composition concentrations. In study component silt/clay an individual phase, its concentration plays key role in determining interstitial fluid. Hence, there are three phases mixture, grain cla...