Opus caementicium uncovered inside a characteristic Roman arch. In distinction to fashionable concrete buildings, the concrete used in Roman buildings was generally included with brick or stone. The Romans utilised concrete extensively from 300 BC to Advert 476.[eighteen] In the course of the Roman Empire, Roman concrete (or opus caementicium) was

Large quantities are often transported by truck, poured free underneath gravity or through a tremie, or pumped by way of a pipe. Smaller amounts might be carried in a very skip (a metal container that may be tilted or opened to launch the contents, commonly transported by crane or hoist), or wheelbarrow, or carried in toggle bags for guide placemen

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