https://en.wikipedia.org/wiki/Roman_concrete
https://en.wikipedia.org/wiki/Damp_(structural)
https://en.wikipedia.org/wiki/Coal_combustion_products#Fly_ash
Concrete casting and curing: proper curing is critical because it helps prevent the concrete from drying too quickly, which can lead to cracking and reduce the final strength of the concrete. During the curing process, the cement reacts chemically with water in a reaction known as hydration. This reaction forms strong bonds that give concrete its strength and durability.Prestressed or post-tensioned concrete is commonly used due to its ability to handle tensile stresses effectively, allowing for longer spans without sagging or structural failure.Fewer supports in the water or land minimize disruption to natural environments, shipping lanes, and roadways beneath the bridge.Longer spans can create visually striking designs that contribute to the bridge’s architectural beauty.
Meandering leads to perfection 