Quantitative Estimation of Clay Mineralogy in Fine-Grained Soils
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 137, Issue 11
Abstract
Stabilization design guidelines based on soil plasticity properties have certain limitations. Soils of similar plasticity properties can contain different dominant clay minerals, and hence, their engineering behavior can be different when stabilized with the same chemical additive and dosage. It is essential to modify stabilizer design guidelines by including clay mineralogy of the soil and its interactions with chemical additives used. Chemical properties of a soil including cation exchange capacity (CEC), specific surface area (SSA) and total potassium (TP) are dependent on clay mineral constituents, and an attempt is made in this study to develop a rational and practical methodology to determine both clay mineralogy distribution and dominant clay mineral in a soil by using three measured chemical soil properties and their analyses. This approach has been evaluated by determining and evaluating clay minerals present in artificial and natural clayey soils of known and unknown clay mineralogy. A total of twenty natural and six artificial soils were considered and used in the chemical analyses. Test results and subsequent analyses including the development of artificial neural network (ANN) based models are evaluated and described in this paper.
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Acknowledgments
The authors would like to express their sincere appreciation to the Texas Department of Transportation (TxDOT) for the support to this research. The authors would like to acknowledge Mark McDaniel, Dr. German Claros of the TxDOT, and Dr. Soheil Nazarian of the University of Texas at El Paso for their assistance with the present research.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 137 • Issue 11 • November 2011
Pages: 997 - 1008
Copyright
© 2011 American Society of Civil Engineers.
History
Received: May 26, 2010
Accepted: Feb 7, 2011
Published online: Feb 10, 2011
Published in print: Nov 1, 2011
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