Barrel o Lime
We began our Lime Slaking project the other day. The major part of the plaster for the outside of the house (and, we've decided, for the kitchen and bathroom inside) will be lime putty, instead of clay.
To make lime putty, we took 5 50lb bags of hydrated Type-S lime, and mixed it into a barrel of water. This is what 250lbs of lime look like in a 55 gallon barrel, with a little water on top:
They say, the longer this stuff sits and soaks, the better it is. It could be a year before we get this stuff on the outside of the house. I hope it's only a couple of weeks before we start working it into the bathroom and kitchen walls.
By the way, since it was hydrated lime, we didn't really have any of the safety concerns that they always warn about. We prepared for them, but it didn't boil, or give off heat, or act like acid, or anything.