Physical models consolidation by electro- osmosis

C.M.A.R. Melo, S. Tibana, F.A. Saboya, R.M. Reis, V.M. Del Aguila, E.Z. Silva

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: Laboratory Testing

ABSTRACT: This paper shows in details results from a comprehensive experimental program that has been carried out in the Centrifuge Laboratory of UENF, where many geotechnical problems have been assessed with physical models. In particular, this study was related to consolidation of physical models of clayey mud using electro-osmosis. Two sets of electrodes were used, the first one to promote radial flow while the second one, one dimensional flow (vertical). The results of these early studies, where a profile of geotechnical parameters like undrained shear strength (Su), water content, and specific weight, obtained before and after electro-osmosis consolidation, are presented here. These tests were performed in an electro-osmosis cell developed to be used to model the seabed of Campos Basis (BRAZIL/RJ). The results show that the electro-osmosis is suitable to consolidate clayey mud in laboratory.

RESUMEN: En este trabajo, se muestran en detalles los resultados de un amplio programa experimental que se ha llevado a cabo en el Laboratorio de Centrífuga de UENF, donde muchos de los problemas geotécnicos se han evaluado utilizando modelos físicos. En particular, se ha demostrado la consolidación de modelos físicos de barro arcilloso a través de electro-ósmosis. Dos juegos de electrodos se utilizaron, el primero para promover el flujo radial, mientras que el segundo, flujo unidimensional (vertical). Los resultados de estos primeros estudios, un perfil de los parámetros geotécnicos como la resistencia al corte sin drenaje, contenido de agua, y la gravedad específica obtenidos antes y después de la consolidación de electro-ósmosis, se presentan en este documento, además de una célula de electro-ósmosis desarrollada para ser utilizada para modelar el lecho marino de Base de Campos (Brasil / RJ). Los resultados muestran que la electro-ósmosis es adecuada para consolidar el barro arcilloso en el laboratorio.

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