Models of water imbibition in untreated and treated porous media validated by quantitative magnetic resonance imaging (Articolo in rivista)

Type
Label
  • Models of water imbibition in untreated and treated porous media validated by quantitative magnetic resonance imaging (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.2913503 (literal)
Alternative label
  • Mirko Gombia; Villiam Bortolotti; Robert J.S. Brown; Mara Camaiti; Paola Fantazzini (2008)
    Models of water imbibition in untreated and treated porous media validated by quantitative magnetic resonance imaging
    in Journal of applied physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Mirko Gombia; Villiam Bortolotti; Robert J.S. Brown; Mara Camaiti; Paola Fantazzini (literal)
Pagina inizio
  • 094913 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • Prodotto digitalizzato (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 103 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 8 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 9 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Dipartimento di Fisica-Università di Bologna (Italy); Dipartimento DICMA-Università di Bologna (Italy); No affliazione - Claremont - California (USA) Istituto ICVBC-CNR Sesto Fiorentino (Italy) (literal)
Titolo
  • Models of water imbibition in untreated and treated porous media validated by quantitative magnetic resonance imaging (literal)
Abstract
  • Fluid imbibition affects almost every activity that directly or indirectly involves porous media, including oil reservoir rocks, soils, building materials, and countless others, including biological materials. In this paper, magnetic resonance imaging ?MRI? has been applied to study water imbibition in a porous medium, in which capillary properties are artificially changed. As a model system, samples of Lecce stone, a material of cultural heritage interest, were analyzed before and after treatment with a protective polymer ?Silirain-50 or Paraloid PB72?. By using MRI, we can visualize the presence of water inside each sample and measure the height z?t? reached by the wetting front as a function of time during experiments of capillary absorption before and after treatment. The sorptivity S, defined as the initial slope of z versus t1/2, has been determined before treatment and through both treated and untreated faces after treatment. Very good fits to the data were obtained with theoretical and empirical models of absorption kinetics, starting from the Washburn model for capillary rise, adapted by others to homogeneous porous media, and modified by us for application to a sample having a thin low-permeability layer on either surface as a result of a treatment process. This gives us parameters to quantify the effects on imbibition of the changes in the capillary properties. It is known that the Paraloid treatment preferentially affects the larger pore channels and the Silirain the smaller, and our results show this and illustrate the roles played by the different classes of pore sizes. (literal)
Prodotto di
Autore CNR
Insieme di parole chiave

Incoming links:


Prodotto
Autore CNR di
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
Insieme di parole chiave di
data.CNR.it