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← HistoryWhich outcome results when seasonal freeze-thaw within the Taj Mahal’s sandstone foundation causes accelerated decay within its pietra dura inlays?
A)Sulphation increases biogenic crust formation
B)Salt crystallization induces tensile stress✓
C)Oxidation accelerates uniform surface recession
D)Hydration promotes integral binder dissolution
💡 Explanation
Salt crystallization within porous pietra dura induces significant tensile stress during freeze-thaw cycles because differential expansion strains the stone matrix. Therefore, widespread cracking occurs, rather than only surface recession driven by the other processes.
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