Microstructral and mechanical parameters determining the susceptibility of porous building stones to salt decay

摘要

In a previous work, the mechanism by which salt crystals grow in porous stone masonries has been studied. It has been shown that the pressure exerted by sodium chloride (NaCl) crystals on the pore walls, when the crystals have entirely filled the coarse pores (10 μm), is the cause of disruption. In the present work, the microstructural parameters controlling the destructive effect of NaCl crystallization in porous stones, and specifically NaCl crystallization in the highly porous biocalcarenite of the historic masonries of the medieval city of Rhodes, which occurs favourable, are studied.