Spatial Microstructural Ordering of Expansive Clay Minerals
Por:
Lopez-Lara, T., Hernandez-Zaragoza, J. B., Carreon-Freyre, D., Cerca, M., Rojas-Gonzalez, E., Franco, A. G. Minor, Martinez-Barrera, G., Salgado-Delgado, R.
Publicada:
1 ene 2018
Categoría:
Civil and structural engineering
Resumen:
The volumetric change within soils containing expanding clays depends
upon their spatial ordering and their mineralogy. So this work studies
the spatial microstructural ordering and mineralogy of different
expanding clays in order to correlate them with some of their
geotechnical properties (plasticity, classification, and expansion). The
clay microstructure was obtained using X-ray diffraction, and sweeping
electronic microscopy. Physical characterization includes pH analysis.
Clays with greater swelling (12.1-14.6% expansion) present greater
agglomeration (gathering) (20-50 microns) in a flocculated structure
that mainly contained sodic montmorillonite with 14-22 angstrom openings
and 8.28 average pH, which indicates high electron concentrations with
border-face interactions. Clays with the least expansion (7.6%) present
lower agglomerations (5-10 microns) with face-to-face contacts within a
dispersed structure that mainly contained calcium montmorillonite with
openings lower than 15 angstrom and pH 7.56, which indicates a low
electron concentration and face-to-face interaction. Major clay
expansion corresponds to a greater size agglomerates, greater opening
between particles, and greater pH presenting border-face and
face-to-face interactions of a flocculent structure. Yet, the soils with
lower expansion only present face-to-face interactions corresponding to
a dispersed structure.
Filiaciones:
Lopez-Lara, T.:
Univ Autonoma Queretaro, Fac Ingenieria, Div Estudios Posgrad, Santiago De Queretaro 76010, Qro, Mexico
Hernandez-Zaragoza, J. B.:
Univ Autonoma Queretaro, Fac Ingenieria, Div Estudios Posgrad, Santiago De Queretaro 76010, Qro, Mexico
Carreon-Freyre, D.:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Lab Mecan Multiescalar Geosistemas, Blvd Juriquilla 3001,Col Juriquilla, Queretaro De Artea 76230, Qro, Mexico
Cerca, M.:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Lab Mecan Multiescalar Geosistemas, Blvd Juriquilla 3001,Col Juriquilla, Queretaro De Artea 76230, Qro, Mexico
Rojas-Gonzalez, E.:
Univ Autonoma Queretaro, Fac Ingenieria, Div Estudios Posgrad, Santiago De Queretaro 76010, Qro, Mexico
Franco, A. G. Minor:
Univ Autonoma Nuevo Leon, Fac Ingn Civil, Avenida Univ Fidel Velazquez Ciudad Univ, San Nicol Ios Garza 66450, NL, Mexico
Martinez-Barrera, G.:
Univ Autonoma Estado Mexico, Fac Quim, LIDMA, Km 12 Carretera Toluca Atlacomulco, San Cayetano 50200, MI, Mexico
Salgado-Delgado, R.:
Inst Tecnol Zacatepec, Div Estudios Posgrad & Invest, Calzada Tecnol 27,Col Ctr, Zacatepec 62780, Mor, Mexico
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