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Within Mughal architectural pietra dura inlay art, which degradation mechanism lowers structural integrity significantly when moisture permeates surrounding limestone?

A)Oxidation of trace metal inclusions
B)Differential thermal expansion stress
C)Alkali-silica reactive aggregate swelling
D)Surface tension causing particulate erosion

💡 Explanation

Differential thermal expansion stress fractures surrounding mortar due to unequal expansion rates between inlays and limestone because temperature fluctuates, therefore weakening the cohesive bonds. rather than oxidation, alkali reactions, or erosion which affect primarily aesthetics.

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