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Minerals 2018, 8(5), 184;

Mid-Infrared Spectroscopic Assessment of Plasticity Characteristics of Clay Soils

Department of Physics, Rostov State Transport University, Narodnogo Opolcheniya Sq., Rostov-on-Don 344038, Russia
UMR 6087 Laboratoire PEC, Université du Maine, F-72000 Le Mans, France
Author to whom correspondence should be addressed.
Received: 3 March 2018 / Revised: 5 April 2018 / Accepted: 25 April 2018 / Published: 28 April 2018
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This work presents a method to determine the plasticity of clay soils using Fourier transform mid-infrared (FT-MIR) spectroscopy. Samples of mono- and polymineral soils of varying water contents are studied. The FT-MIR results are compared with the results obtained from standard Russian and international methods for the plasticity range. The correlation between the consistency of clay soils, when displaying their plastic properties, and the position of the Si–O stretching band in the FT-MIR spectra is established. The possibility of, and interest in, determining the plasticity characteristics of clay soils using mid-infrared spectroscopy is demonstrated: it yields effectively higher precision results compared to standard test methods. It is shown that the method of IR spectroscopy allows the fixing of the start and the completion of the series of “phase transitions” of the soil in the plastic and liquid state. The significant effect of the concentration of non-clay minerals on the Si–O ν line is that a moisture content curve is noticed, which may help to predict the clay content of the soil without undertaking XRD analysis. View Full-Text
Keywords: soil; clay minerals; plasticity; plastic limit; liquid limit; infrared spectroscopy soil; clay minerals; plasticity; plastic limit; liquid limit; infrared spectroscopy

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Kasprzhitskii, A.; Lazorenko, G.; Khater, A.; Yavna, V. Mid-Infrared Spectroscopic Assessment of Plasticity Characteristics of Clay Soils. Minerals 2018, 8, 184.

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