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The present overview on   salt­-induced deterioration of inorganic porous materials focuses on those topics considered the most relevant for understanding this phenomenon. These are movement of  both   water/moisture and  salts within the pore system; influence of the  presence of salts in moisture  absorption; effect  of the simultaneous presence of  more than  one salt;  salt  distribution in masonry deterioration mechanisms; and  weathering patterns.  Of the latter, the most ubiquitous are powdering and scaling, and they have been found to occur on most stone types.  However, the mechanism that induces the same outward appearance on different stones can vary significantly depending on the synergism that develops among porous material, salt, and moisture.

This research was made possible through Grant MT-2210-8-NC-34 from the National Center for Preservation Technology and Training (NCPTT).

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National Center for Preservation Technology and Training
645 University Parkway
Natchitoches, LA 71457

Email: ncptt[at]
Phone: (318) 356-7444
Fax: (318) 356-9119