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← HistoryWhich structural failure mode risks early Roman concrete domes if exposed to continuous water infiltration?
A)Aggregate spalling from freeze-thaw cycles
B)Rebar corrosion from electrochemical reactions
C)Pozzolan leaching from hydrolysis reaction✓
D)Thermal cracking from rapid temperature swings
💡 Explanation
When water infiltrates Roman concrete, pozzolan leaching occurs because calcium hydroxide reacts with water, causing the cementitious matrix to dissolve. Therefore pozzolan leaching results, weakening the concrete, rather than spalling, corrosion or cracking which require different environmental conditions or components.
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