I plan to use gypsum for creating my next custom made nest. So far have done couple of grout based nests.
It will be small one. will fit it inside 100mm x 150mm picture frame.
As a material gypsum is reasonably brittle. But as I have bag of it laying around - why not mess with it a little.
The brittle side of it slightly concerns me. Was thinking of making the gypsum "brick" ~30mm thick, hope it will be thick enough.
Second thing I'm concerned is humidity. In direct contact with water, gypsum should start to turn back into dough.
Not sure jet, how to do proper hydration system into gypsum nest.
I have feeling this material is suitable more for very dry loving ants only, where you can keep the nest very dry and provide water in out-world.
Ants might be even able to dig though it maybe over longer period of time.
Plan is to accommodate one of my Lasius Niger colonies into that nest. If that would be no-no case for any reasons, let me know.
All comments-suggestions welcome. Having good starting point with better knowledge on gypsum as nest material would prevent me inventing the wheel