Quantitative estimation of clay mineralogy in fine-grained soils / Bhaskar Chittoori in Journal of geotechnical and geoenvironmental engineering, Vol. 137 N° 11 (Novembre 2011)  

Public ISBD [article]  inJournal of geotechnical and geoenvironmental engineering > Vol. 137 N° 11 (Novembre 2011) . - pp. 997-1008 Titre : Quantitative estimation of clay mineralogy in fine-grained soils Type de document : texte imprimé Auteurs : Bhaskar Chittoori, Auteur ; Anand J. Puppala, Auteur Année de publication : 2012 Article en page(s) : pp. 997-1008 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Clay mineralogy Montmorillonite Kaolinite Expansive soil Mineral quantification Artificial neural networks Résumé : 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. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i11/p997_s1?isAuthorized=no [article] Quantitative estimation of clay mineralogy in fine-grained soils [texte imprimé] / Bhaskar Chittoori, Auteur ; Anand J. Puppala, Auteur . - 2012 . - pp. 997-1008. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 11 (Novembre 2011) . - pp. 997-1008 Mots-clés : Clay mineralogy Montmorillonite Kaolinite Expansive soil Mineral quantification Artificial neural networks Résumé : 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. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i11/p997_s1?isAuthorized=no

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