Study of Effectiveness of Treatment by Nanolime of the Altered Calcarenite Stones of the Archeological Site of Volubilis Site (Morocco)

Nanolime consolidation of the main building stone of the archaeological site of Volubilis (Morocco)

“…The average weight variation of the samples during the salt crystallization test is presented in figure 9. [34] The average dry weight increased at the beginning of the test (during the first three cycles) as a result of the presence of the salt that precipitated in the pores of the tested samples. After that, the weight of the accumulated salt could not be balanced by the lost weight due to loss of surface matter [45], causing a decrease in weight from the fourth cycle on.…”

“…Even though capillary absorption is the most used method of application in laboratory studies, it is not a practical one [6-20-21]. In this study, nanolime was applied by brushing [34] which is commonly adopted in the practice of in-situ conservation [6,7].…”

“…The interval between two consecutive applications was defined as 3 hours. All measurements were performed after 28 days of curing [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37]. During this time, the specimens were placed in a controlled environment, with a temperature of 20°C and relative humidity of 76 %, to enhance the carbonation process and ensure maximum conversion of Ca(OH)2 into CaCO3 [38].…”

“…Figure 9: Average weight variation during the first 6 cycles of the salt crystallization aging test[34] …”