古罗马建筑2000年不倒的秘密

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古罗马人是建筑和工程大师，最著名的代表可能是渡槽。而那些仍能发挥作用的奇迹依赖于一种独特的建筑材料：火山灰混凝土，一种极其耐用的混凝土，赋予了罗马建筑难以置信的强度。即使在今天，他们的建筑之一——万神殿，仍然完好无损，已有近 2000 年的历史——保持着世界上最大的无钢筋混凝土圆顶的记录。

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