The record of Roman construction using concrete is filled with structures having astounding longevity. Pliny the Elder wrote of the strength of their concrete in the first century AD noting that in seawater it got stronger every year. Today, modern concrete made with Portland cement, circa 1824, is considered to have a 50 year life in seawater. Unfortunately, when the Roman empire fell, about 476 AD , it took the recipe for this incredible building material down into history with it.
There is no other man-made building material that can boast of a history covering thousands of years if done right. TNSR Systems concrete, created by streaming space age materials into a high strength and durable composite, is stalking the potential of Roman concrete