IFEG   20353
INSTITUTO DE FISICA ENRIQUE GAVIOLA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Pore Sizes Distribution of Unconsolidated Geomaterials
Autor/es:
MONTORO M.A.,CERIONI, L.M.C., PUSIOL, D.J.
Reunión:
Conferencia; 18th ISMAR 2013/14th NMR Users Meeting; 2013
Institución organizadora:
ISSMAR
Resumen:
Pore size and pore sizes distribution of soils and rocks control
many hydraulic and mechanical properties of natural geomaterials
such as hydraulic conductivity and shear resistance.
43
Abstracts of Talks ? Small Molecules and Methods
Pore size and sizes distribution of rocks depend on their
mineral composition and the geological processes involved
in their formation, while for unconsolidated materials such
as soils, depend on grain sizes, grain sizes distribution and
overburden pressure. The aim of this project is to correlate
transversal relaxation time (T2) with grain size of loose
sandy soils in systems of single and double porosity. In this
research we applied Time Domain Nuclear Magnetic Resonance
(TD-NMR) to measure the magnetization decaying
curve of samples composed of selected sizes of sand grains,
poor graded sands, silty sands, silt and clay. This was performed
by a CPMG pulse sequence using a low field (12
MHz) spectrometer (SLK-100). Obtained results show that
transversal relaxation time and its distribution are strongly
correlated with grain sizes and their distribution. These
results allow improving the knowledge about pore sizes distribution
when needed for modeling porous materials using
numerical techniques such as pore networks.
ACKNOLEDGEMENTS: CONICET, SECyT-UNC,
FONTAR, FONCYT