How are Rome's monuments still standing?

Re:How are Rome's monuments still standing? by jaclaz on Tuesday December 21, 2021 @05:09AM (#29635831)

Briefly (costs/duration):

normal steel rebar=1

epoxy coated rebar=1.1-1.3 <- terrible in practice

zinc coated rebar=1.2-1.4 <- good

stainless steel rebar=3-4-5 <- very, very good

carbon fiber rebar=? <- AFAIK not used in new buildings, as it has a series of issues in practice, used in some rare cases of consolidation/repair of old buildings, mostly not as rebar but rather as mesh/net.

What is used, not as "main" reinforcement but to have a (much better) mass strength are fibers, they can be either steel or plastic.

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Re:How are Rome's monuments still standing? by Sankozi on Tuesday December 21, 2021 @06:44AM (#29636426)

I think I do not understand the numbers. You wrote "costs/duration" so higher the number the worse solution (bigger costs or worse durability), yet the descriptions suggests otherwise.

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Re:How are Rome's monuments still standing? by jaclaz on Tuesday December 21, 2021 @12:57PM (#29640090)

Sorry, numbers are cost only (1 is "normal" rebar steel) order and text are duration ("normal" steel no text, base duration, the terrible in practice means that it doesn't offer longer duration, and may have issues in adherence to concrete).

Not so surprisingly the higher the cost the longer the duration.

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