I forgot another important reason why Portland cement is preferred over lime these days. Lime takes a while to set (a few days?), cement sets faster.

> Lime takes a while to set (a few days?)

Up to 30 days to set, and depending on the type of lime (hydraulic or non-hydraulic) and form/process (putty, hot mix, etc.) up to a year to reach full hardness.

Cement will still take many days to reach full cure time (measured in increasing PSI ratings)

https://www.ce.memphis.edu/1101/notes/concrete/section_3_pro...

But it will be set enough to keep laying bricks tomorrow. Lime on the other hand takes a bit more thought. It is doubly true if the weather is cold

You aren't contradicting anything. MOST of the strength is achieved in 24 hours or less.

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