Increased spalling risk appears in Mughal pietra dura when?

💡 Explanation

Differential thermal expansion creates stresses within inlaid stones due to mismatched expansion coefficients; this causes spalling because cyclical variance strains material bonds, therefore an expansion mismatch presents risk, rather than sole reliance on grout or adhesive mechanics.

• Which structural consequence results from prolonged mineral deposition within a Roman aqueduct channel?
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