English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/135631
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Título

Evaporative Moisture Loss from Heterogeneous Stone: Material-Environment Interactions during Drying

AutorMcAllister, Daniel; Warke, Patricia; McCabe, Stephen; Gómez-Heras, Miguel
Palabras claveEvaporation
Sandstone
Porosity
Permeability
Fecha de publicación5-ago-2016
EditorElsevier
CitaciónGeomorphology (Available online 5 August 2016)
ResumenThe complexities of evaporation from structurally and mineralogically heterogeneous sandstone (Locharbriggs Sandstone) are investigated through a laboratory-based experiment in which a variety of environmental conditions are simulated. Data reported demonstrate the significance of material-environment interactions on the spatial and temporal variability of evaporative dynamics. Evaporation from porous stone is determined by the interplay between environmental, material and solution properties, which govern the rate and mode by which water is transmitted to, and subsequently removed from, an evaporating surface. Initially, when the stone is saturated, evaporation is characterized by high rates of moisture loss primarily controlled by external atmospheric conditions. However, as drying progresses, eventually the hydraulic continuity between the stone surface and subsurface is disrupted with recession of the drying front and a decrease in evaporation rates which become reliant on the ability of the material to transport water vapour to the block surface. Pore size distribution and connectivity, as well as other material properties, control the timing of each stage of evaporation and the nature of the transition. These experimental data highlight the complexity of evaporation, demonstrating that different regions of the same stone can exhibit varying moisture dynamics during drying and that the rate and nature of evaporative loss differs under different environmental conditions. The results identify the importance of material-environment interactions during drying and that stone micro-environmental conditions cannot be inferred from ambient data alone. These data have significance for understanding the spatial distribution of stone surface weathering-related morphologies in both the natural and built environments where mineralogical and/or structural heterogeneity creates differences in moisture flux and hence variable drying rates. Such differences may provide a clearer explanation for the initiation and subsequent development of complex weathering responses where areas of significant deterioration can be found alongside areas that exhibit little or no evidence of surface breakdown.
Versión del editorhttp://dx.doi.org/10.1016/j.geomorph.2016.08.008
URIhttp://hdl.handle.net/10261/135631
DOI10.1016/j.geomorph.2016.08.008
ISSN0169-555X
Aparece en las colecciones: (IGEO) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
G_2016_McAlister_inpress.pdf Embargado hasta 5 de agosto de 20181,1 MBAdobe PDFVista previa
Visualizar/Abrir     Petición de una copia
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.