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← HistoryIn Roman aqueducts which outcome results, after initial structural cracking, when water freezes inside?
A)Accelerated stone block shifting upstream✓
B)Reduced water flow rate temporarily
C)Formation of protective mineral deposits
D)Decreased hydrostatic pressure overall
💡 Explanation
Progressive disintegration occurs due to ice wedging, because expanding ice exerts pressure exceeding the tensile strength of the masonry. This causes accelerated cracking, therefore blocks upstream shift rather than simple flow reduction, given cyclical freeze-thaw cycles.
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