Thixotropic Behavior of Reconstituted Debris-Flow Mixture

نویسندگان

چکیده

Time-dependent rheological properties and thixotropy of reconstituted debris-flows samples taken from channel bank deposits are examined using a commercial rheometer equipped with vane rotor geometric system. Sweep tests creep were carried out involving mixtures having different grain concentrations ranging between 50% 58%. Different initial conditions the considered in order to analyze effects aging rejuvenation (thixotropy) over short period time long time. Tested slurries show viscosity bifurcation, yield stress time-dependent behavior. According experimental results, three regimes identified: lower shear rate regime, corresponding than critical value; an intermediate banding regime characterized by static dynamic level; higher where flowing debris behaves as non-Newtonian fluid constant steady state ultimate apparent viscosity. In any case, mixture sediment concentration affects rheology slurries’

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ژورنال

عنوان ژورنال: Water

سال: 2021

ISSN: ['2073-4441']

DOI: https://doi.org/10.3390/w13020153