Which limitation drove Roman engineers to improve concrete?

💡 Explanation

The Romans utilized concrete with stone aggregate because the aggregate interlocking mechanism increased tensile strength; therefore, large spans were possible for structures such as the Pantheon rather than needing purely arch-based construction.

• Which outcome occurs when ancient maize plants repeatedly undergo selective breeding in chinampa systems?
• Which outcome occurs when pre-Columbian terrace construction fails?
• Which outcome resulted in Byzantine painted icons when egg-based tempera dried too quickly?
• Which consequence results when timber warships lack sufficient 'hogging trusses' during construction?
• Which risk increased when ancient Mesopotamians used irrigation with water sourced from the Tigris and Euphrates rivers?
• Which constraint limited the dimensional scale of early Mesopotamian cast bronze statues?