Which defensive outcome arose from the Roman adoption of concrete in fortification construction after iterations in hydraulic infrastructure?

💡 Explanation

When the Romans adopted concrete, the pozzolanic reaction created a durable, weather-resistant material that, when used in fortifications, could absorb more impact from siege weaponry like ballistae because of its distributed mass and internal damping rather than tensile strength alone. Therefore increased defense resulted, rather than reduced costs or maintenance which would require easily sourced labor and reusable design/structure.

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