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Seminario DICIM (5 de Abril de 2017, 12:00 - 13:00 Hrs)

publicado a la‎(s)‎ 31 mar. 2017 9:45 por Sistemas DICIM   [ actualizado el 31 mar. 2017 10:59 ]
 TítuloExpansión hídrica en rocas usadas en la construcción de edificios históricos en México. Importancia del contenido de minerales arcilloso 

PonenteDr. ​Ruben Alfonso López Doncel​ 

Procedencia: Instituto de Geología de la UASLP 

LugarAuditorio de la Facultad de Ciencias, UASLP (mapa

ResumenVarious authors suggest that the swelling ability of clay minerals provokes moisture expansion, which contributes to the weathering and deterioration. Hydric and hygric wetting experiments undertaken on the building stones show that the phenomenon of the expansion certainly can be related to the content of clay minerals. However, there are rock samples that show only moderate or no expansion, although they have a significant amount of clay minerals. Our studies underline the importance of the pore space properties within the rock material for moisture expansion. The results show that the amount of micropores plays a decisive role in hydric and hygric swelling, while the amount of clay minerals seems to be less important. On the other hand, we identified rock types rich in clay minerals, which indicate that a stone material has a greater amount of swellable clay minerals and normally has an influence on the moisture expansion. In the presented study a correlation of the CEC-values and the moisture expansion does not appear. 

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