5 ms·

Is this just survivorship bias?

• coryrc 10y ago
  No, they are chemically different cements. However, Roman cements have a tenth the strength of Portland cements, so we can build much bigger structures now even if they won't last as long.
  • pouetpouet 10y ago
    Also no rebar, so it means big arches, massive vaulted ceilings, domes etc...