Concrete Volume Calculator
With an estimated world wide production rate of 5 billion cubic tons per year, concrete is the second most consumed substance on earth after water. The U.S. alone uses about 340 million cubic yards (260 million cubic meters) of ready-mixed concrete each year.
In the 1890's, an engineer in Italy named Carlo Gabellini built barges and small ships out of concrete. The most famous of his ships was the Liguria.
Numerous small concrete boats were built in the U.K in the 1910's. One of these ships, the Violette, was built in 1917 and is currently used as a boating clubhouse on the Medway River in England. This makes her the oldest concrete ship still afloat.
In 1824, Joseph Aspdin, a bricklayer and mason in Leeds, England, took out a patent on a hydraulic cement that he called portland cement because its color resembled the stone quarried on the Isle of Portland off the British coast.