Which mechanism slowed Roman concrete production after volcanic ash source depletion?

💡 Explanation

Reduced volcanic ash concentration decreased pozzolanic activity leading to decreased aggregate binding strength, because hydration relies on specific chemical reactions. Therefore, the concrete was weaker, rather than setting slowly or being colder.

• Which mechanism limited bronze water screw pump effectiveness in ancient mines?
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• Which accuracy risk increased when using chronometers for longitude determination in 18th-century sailing despite use of sextants?
• Which visual effect in medieval Islamic astronomy results from atmospheric refraction during observation?
• Which outcome arises when al-Khwarizmi’s quadratic equation solutions, geometrically derived, encounter irrational coefficients during astrolabe design?
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