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Which degradation happens sooner when repeated freeze-thaw cycles affect external pietra dura inlay comprising thermally incompatible stones?

A)Adhesive material delamination occurs
B)Stone fracture propagation increases
C)Grout expulsion becomes inevitable
D)Oxidizing agents induce staining prevalent

💡 Explanation

Adhesive delamination becomes the initial failure because differential thermal expansion creates shear stresses at the interface leading to eventual detachment from its substrate; therefore, the epoxy bond degrades before actual stone fracture, rather than direct fractures caused uniquely by the stone material’s properties.

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