During Roman concrete construction, which outcome indicates insufficient pozzolan content?

💡 Explanation

Insufficient pozzolan reduces the pozzolanic reaction. This reaction consumes calcium hydroxide and forms calcium silicate hydrate thereby promoting the long-term Calcium Silicate Hydrate formation. Reduced calcium silicate hydrate bond therefore reduces compressive stregth, because insufficient reaction prevents continued strengthening, rather than boosting freeze-thaw.

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