Yield Stress of Clay–Water Systems


I HAVE shown elsewhere1 that the variation of specific viscosity (ηsp) with solid content (c) for concentrated sodium montmorillonite sols follows the Schultz–Blatschke relation2 for systems of anisometric particles: [η], the ‘intrinsic viscosity’, depends on the dissymmetry (p) of the dispersed and solvated clay platelets ; while k′ represents the particle–particle interaction at unit dissymmetry. At any sol concentration, ηsp = ηspC[η] will thus measure the contribution of this latter factor to the specific viscosity.

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    Packter, A., Kolloid Z. (in the press).

  2. 2

    Schultz, G. V., and Blatschke, F. J., Z. phys. Chem., B, 50, 305 (1941).

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    Loomis, A. G., Trans. Amer. Inst. Min. and Met. Eng., 142, 86 (1941).

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    Vold, M. T., J. Coll. Sci., 5, 451 (1954).

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PACKTER, A. Yield Stress of Clay–Water Systems. Nature 177, 144–145 (1956). https://doi.org/10.1038/177144a0

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