Variations dilatometriques de cylindres de roches calcaires subissant des cycles de gel-degel

• Published in: Permafrost and Periglacial Processes
• Main Authors: Prick, Angélique, Pissart, Albert, Ozouf, J.-C.
• Format: Article in Journal/Newspaper
• Language: French
• Published: John Wiley & Sons 1993
• Subjects: calcareous rocks cylinders; diameter; freeze-thaw cycles; Physical; chemical; mathematical & earth Sciences; Earth sciences & physical geography; Physique; chimie; mathématiques & sciences de la terre; Sciences de la terre & géographie physique; Permafrost and Periglacial Processes
• Online Access: https://orbi.uliege.be/handle/2268/250180; https://orbi.uliege.be/bitstream/2268/250180/1/Variations%20dilatometriques%20de%20cylindres%20de%20roches.pdf; https://doi.org/10.1002/ppp.3430040102

peer reviewed The variations in diameter and length of calcareous rocks cylinders were measured during freeze-thaw cycles. These measurements have shown the existence of intricate and non-isotropic variations in the dimensions of the rocks. These result mainly from the migration of non-frozen water within the samples; these migrations towards the largest pores or towards the faces of the sample first exposed to the freezing front are responsible for contractions in areas where expansions were expected. The experiments stress the importance of water content and porosity of the rocks, of the cooling rate and of small variations of experimental conditions. -from English summary