Which risk sharply increased if Roman lime mortar contained volcanic pozzolana?

💡 Explanation

Increased pozzolan content boosted the mortar's hydraulicity via pozzolanic reaction. This creates interlocking hydrates increasing water resistance, because it limits cracking and crumbling under normal pressure. Therefore, fire resistance diminished rather than boosting it, which is crucial under intense heat exposure.

• Which crop productivity risk arose for Incan terrace farms when intensive irrigation leached soil?
• Which consequence occurred when the alloy ratios shifted during cannon casting?
• Which outcome occurred when early bronze-age smiths quenched copper-arsenic alloy tools too rapidly in water?
• When early cannon barrels of cast iron experienced catastrophic failure, which mechanism triggered the explosions?
• Which outcome arises when operating a Roman ballista in sustained combat?
• Which long-term outcome frequently resulted from the use of chinampas without proper water management techniques?