Such methods have also been briefly tested on building stone but not in urban environments, where fast stone weathering rates are typically observed, mainly due to interaction of minerals with several pollutants and where other specific processes, such as salt weathering, can occur.
In addition, the built environment entails specific weathering processes namely salt weathering. Contributing sources to salt contamination and weathering are variable leading to different geochemical signatures (Sanjurjo-Sanchez and Alves, 2012a).
salt weathering), and (iii) indices that include some elements (such as Si, Al and K) seem to be generally more consistent in these complex environments.
The study area affected by a number of geomorphological processes, which result in some risks and these include the following operations Salt weathering Processes:
Salt weathering is in fact a kind of chemical and Mechanical weathering, meaning that it had gathered between the two, because it involves aspects of the chemical, although its role in the disintegration of rocks physically the first place (Mhassob, 2004, 110).
An example of salt weathering can be seen in the honeycombed stones in sea wall.
The two processes in operation, salt weathering and case hardening, have been first described by Beyer (1912) in the Sachsische Schweiz in Saxony.
In inland settings, salt weathering is typically associated with surface crusting (Robinson and Williams, 1987).
An important role of salt weathering in honeycomb formation is accepted for sandstone outcrops lying within the reach of wave splash and salt spray at seashores (e.g., Mustoe, 1982, 2010; Pye and Mottershead, 1995; McBride and Picard, 2004), even though such process is only rarely accompanied by surface crusting.
Egypt has a great number of archeological sites, most of these sites suffered from weathering, these process may be a result of many factors such as the effect of the affect of near surface water with its dissolved salts, through the salt weathering process.
Damage inspection pointed out that salt weathering is the main suspect factor causing Barqoq monument deterioration.
Salt weathering resulting from the uprising of subsurface water by capillary action is the main suspect external factor of weathering damage of the Barqoq monument lower parts.