Which primary risk increased for Roman arch bridges as the concrete mix evolved during bridge construction?

💡 Explanation

Lateral thrust increased on abutments because the improved *pozzolanic reaction* led to stronger concrete, therefore structures could be taller and arches wider, rather than being limited.

• Which consequence results when timber framing lacks proper mortise depth in eighteenth-century ship construction?
• Which production constraint increased when timber exhaustion began affecting Venetian arsenal shipbuilding?
• Which engineering challenge delayed completion of the original Panama Canal locks?
• Which outcome becomes more probable on a 1780s frigate if a gunport's lower edge is too close to the waterline?
• Which limit constrained the effectiveness of Inca quipu for decentralized recordkeeping?
• Which risk dramatically increases when timber bridges' joints degrade?