Lime mortar & wood ovens?

[TrevorML]

No apologies necessary Dave... no offense taken...

must have been one of those days... I think I was doing a bit of the same letting off steam very early on in the thread... work gets to you like that sometimes... I know it has with me lately

a real pity work has to get in the way of life so much... wood oven bread... a good glass of red... great company... really that is all there should be... at least sometimes

[Mojoe]

The only environmental plus that I can see from Lime is that it takes CO2 out of the air (much like a plant) and it would be interesting to know just how much.

As far as lower temperatures, consider a few of a long list of possible fuel sources cement plants utilize as a result of burning at higher temperatures:

Shingles from your house.

Petcoke, a by-product of oil refining.

Tires from say those over abundant cement/concrete trucks or even your car.

CoGeneration= turning all that heat into power

Cement plants have been governed by the EPA here in the US for many years, check out the compliance dates for Lime manufacturers: Lime Manufacturing Article

As far as the health hazards, silica is the nasty little guy present in limestone which, as we know, is used to make lime and cement. Over exposure to silica over long periods of time leads to silicosis, hardening of the lungs. Basically your lungs set up much like the mortar you're using... they slowy lose their expansive capabilities.

Just wanted to throw my nickel in the pot, seemed a little unfair to portray cement in such a fashion.

[asudavew]

Originally Posted by TrevorML

a real pity work has to get in the way of life so much... wood oven bread... a good glass of red... great company... really that is all there should be... at least sometimes

You forgot bowling.

[Dutchoven]

OK...my perspective has changed a bit since my last post. I have since taken apart 3 fireboxes in the upstairs that were laid using the same lime putty mixture as the rest of the building. Having seen it first hand I now have even more serious doubts about a pure lime/sand putty to be the mortar for a WFO. The deterioration was significant and the mortar was very soft. Some of the areas had been exposed to moisture but, for the most part, mortar condition did not change other than dampness in those areas and less dust(which I liked better). I also would have concerns about expansion rates between our more modern medium duty firebrick and the older softer red clay solids that were used at the time. I think the old brick with old mortar would be OK but, and once again it is a big one, I don't think mixing newer with older materials. Fireclay as an additive is definitely part of my opinion and I will still hold to the feeling a some portland/calalum cement, albeit only about 1/2 to one part.
Best
Dutch

[Archena]

http://minerals.usgs.gov/minerals/pu.../limemyb01.pdf


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