Which mechanism limited building heights using Roman concrete masonry?

💡 Explanation

Tensile strength limited Roman concrete heights because after a few stories poured concrete cracked under its own weight due to the tensile stress exceeding Cohesion; therefore height was limited, rather than by cost or curing.

• Which mechanism limited the hull speed of 18th-century sailing ships, irrespective of sail area increase?
• Which risk increases when water enters a wooden ship's hull?
• Which outcome becomes more probable on a 1780s frigate if a gunport's lower edge is too close to the waterline?
• Which inaccuracy becomes significant when sextants are used from unstable platforms?
• Which risk increased significantly when early Mesopotamian bronze-tipped plows encountered saline soils?
• Which outcome immediately follows when compressive stress overcomes the shear strength within vertically stacked Inca stone masonry?