The physical-mechanical behaviour of the weathered San Giacomo granite, Sardinia, has been investigated using a combination of physical-mechanical tests and microstructural analysis. Fieldwork and microscopy suggest a pervasive microfracture system developed on a pre-existing magmatic quartz anisotropy. Alteration indices, chemical analyses and mineralogy indicate that the yellow staining is produced by the circulation of oxygen-rich rainwater through microfractures in the rock, resulting in the oxidation of biotites. Apart from the obvious modification of the original grey colouring, the precipitation of Fe-oxides and hydroxides has welded fractures together, leading to the partial recovery of the physical-mechanical properties previously compromised due to microfracturing. Â© 2012 Springer-Verlag.
Scheda prodotto non validato
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo
|Titolo:||Can weathering improve the toughness of a fractured rock? A case study using the San Giacomo Granite|
|Data di pubblicazione:||2012|
|Appare nelle tipologie:||1.1 Articolo in rivista|