In Acient Rome the people made aqueducts, bridges, and amphitheaters. The machines that they'd made was cranes, water mills, grain mills, and water pumps. Their roads had four layers, the top layer was pavimentum, the second layer was the nucleus, the third layer was the rudus, and the bottom layer was statumen. Wooden bridges were built by the army. Etruscians built arch bridges made of stone.
Romans used many differnet materials to build things. The most important building material was stone. many things were built with nothing but dry stone. In Rome, strong motar was called pozzolana. They thought it was sand but it was ash from prehistoric volcano eruptions. The romans prefered to build with bricks and mortar. Romans were the people who invented concrete. Builders also used limestone burnt in a kiln to build things.
ROMAN ROADS
before building a road in ancient rome surveyorsplanned the road and they would aim at high points on the landscape
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