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Re: Thanks guidance mechanical etc. - preoccupied lime mortar'ing

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"Richard Smith"  wrote in message news:m1v7914chu.fsf@void.com...
>
I at least somewhat see now how in Roman "hydraulic mortars" - mortars
which have a self-setting reaction "within themselves" after
hydration, not solely relying on drying and/or reaction with
carbon-dioxide in the atmosphere (as lime tries to revert to
limestone) - are "clever".  Roman mortar on quays / harbours in
seawater have lasted 2 millennia and remain sound.  It was thought
unreacted quicklime was "careless" hot-mixing.  I can now at least
kind-of see what has recently been realised - that feature is
deliberate.  It gives a self-healing mechanism, by having a reservoir
of quicklime to chemically react and self-heal if there is structural
settlement etc.

-----------------------------------
The Romans were fortunate to have this volcanic ash nearby:
https://en.wikipedia.org/wiki/Pozzolan

My understanding is that the unreacted quicklime dissolves in water leaking 
through cracks and deposits like cave stalactites when the water evaporates 
at the exposed end.

In Germany I saw concrete from the rushed construction of the 1930's and 
40's that was already crumbling, plus ancient work that wasn't.

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Thanks guidance mechanical etc. - preoccupied lime mortar'ing Richard Smith <null@void.com> - 2026-08-23 06:44 +0100
  Re: Thanks guidance mechanical etc. - preoccupied lime mortar'ing "Jim Wilkins" <muratlanne@gmail.com> - 2026-08-23 07:45 -0400
    Re: Thanks guidance mechanical etc. - preoccupied lime mortar'ing Bob La Londe <none@none.com99> - 2026-08-23 09:52 -0700
      Re: Thanks guidance mechanical etc. - preoccupied lime mortar'ing "Jim Wilkins" <muratlanne@gmail.com> - 2026-08-23 18:25 -0400
        Re: Thanks guidance mechanical etc. - preoccupied lime mortar'ing Bob La Londe <none@none.com99> - 2026-08-24 12:19 -0700
          Re: Thanks guidance mechanical etc. - preoccupied lime mortar'ing Richard Smith <null@void.com> - 2026-08-25 10:45 +0100
            Re: Thanks guidance mechanical etc. - preoccupied lime mortar'ing "Jim Wilkins" <muratlanne@gmail.com> - 2026-08-25 17:48 -0400
              Re: Thanks guidance mechanical etc. - preoccupied lime mortar'ing Richard Smith <null@void.com> - 2026-09-02 13:20 +0100

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