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Which adhesion failure arises when insufficient lime slaking occured in Byzantine mosaic creation?

A)Reduced tesserae-mortar cohesive strength
B)Increased hygroscopic salt efflorescence
C)Accelerated thermal expansion mismatch
D)Diminished substrate freeze-thaw resistance

💡 Explanation

Reduced tesserae-mortar cohesive strength occurs because undissolved quicklime expands during hydration reaction within lime mortar, which weakens the adhesive interfacial bonding; therefore, tesserae delamination occurs rather than proper adhesion due to flawed setting.

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