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Which consequence results when materials weather in dry stone Inca bridges?

A)Arch keystone displacement occurs
B)Cable anchoring points fail
C)Sustained creep deformation decreases
D)Masonry friction reduces settling

💡 Explanation

Arch keystone displacement occurs because freeze-thaw cycles cause differential stresses at joints, affecting arch integrity, a form of Mechanical Weathering. This weakens joints weakening the load capacity; therefore, keystone integrity is threatened rather than strengthened by consolidation.

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