Which structural risk increased during Ur-Nammu's ziggurat construction when clay bricks fully dried before placement?

💡 Explanation

When sun-dried clay bricks fully dried before placement, differential shrinkage occurred because moisture absorption from applied mortar was reduced, leading to weakened mortar adhesion and interlayer stresses. Therefore weakened adhesion results, rather than seismic vulnerability, weathering, or reduced initial strength, which have different primary drivers.

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