I found a construction site near me with an excavated hole, the exposed sub-soil looks like a good clay source. I'd like to gather some to build an earthen oven, but it probably won't be for a couple months since I need to buy some materials and do the prep work. If the soil has good clay content, could I just keep it in a plastic tub until I'm ready to use it? I'm assuming it would just dry out some and I'd have to rehydrate it when I'm ready to build. Does anyone have experience or advice on this?
Hi Nathan, As Walt stated it will definitely work. I have done this for years. I gather a few buckets worth of high clay soil, add a little water over the top and cover to keep it from drying out. I do this in the fall and keep it in my workshop over winter where I use it to modify/patch my rocket mass heater. Sometimes if there is organic material in there may start to decompose a bit and stink a little like a swamp but goes away when dry. This is why its good not to mix any straw or fiber of your choice in there until your ready to use it.