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Which risk increases when lime mortar carbonation in Cyclopean masonry decreases?

A)Water erosion of stone weakens
B)Building's thermal expansion rises fast
C)Grout separation lowers shear strength
D)Internal rebar experiences higher corrosion

💡 Explanation

Grout separation and reduced shear strength increase because insufficient carbonation in the historic lime mortar diminishes its binding capability, weakening adherence to massive stones. Therefore shear resistance along mortar joints fails rather than uniformly distributing force to elements within the stone blocks themseleves.

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