I'll be building a barn in the spring and I was thinking of giving it a gravel trench foundation with a poured limecrete grade beam on it. I have professional experience with lime putty, and with cement and concrete too, but I've never used natural hydraulic lime before and I can't find any reports online of people using it in this way.
I'm thinking of using NHL5, as this is the NHL that would most closely resemble the strength and rigidity of cement, and then I'd just go about it as if it was concrete, in that I would choose the dimensions of the grade beam based on recommendations for concrete, then build it a mold and put rebar in it, just like concrete.
This is my tentative plan, anyways. I'd like to hear from anyone with experience with NHL's, to see if this sounds good enough or just too risky. I don't want to risk ruining the whole barn over a few bags of cement.... but it would be nice to find an alternative.
PS - just to say in advance that I'm not a fan of fly ash, there's evidence that it's quite toxic and I'm trying to reduce my exposure to weird unhealthy things!
Sorry for the tardy reply. I have limited experience, but know that structural application will not meat most building load dynamic. I work designing, building and restoring barns and I am fairly confident that the "moment and dynamic loads of these structures are to great for the application of limecrete as described and/or without PE approval that has experience. I will give some contact info if you don't have them already, and suggest looking at just the gravel trench, then some mounding modalities with tectonically stabilized gravel pad as one suggestion, geopolymere as another, natural cement and/or some nice dry laid stone as has been down for millenia. Let me know if I can be of further assistance.