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[cob] soil cement foundationfrancine fran2000a1 at yahoo.comWed Jun 1 09:27:05 CDT 2005
Thank you Lance for the info, fortunately there is a sand pit close to me and I plan to bring several loads to the site for the stemwall. My soil is sandy but contains a good bit of clay. Perfect I think for cob, but I will add the sand for soil cement. I read somewhere that clay is not good for soil cement, and that cement would need to be increased if there was clay in the soil. I will follow your advice and make a few "stepping stones" for the yard and see which is the strongest. That is if it will quit raining here this week. In the Becky Bee book it recommends 9 parts soil to 1 part cement I think. I'll start there. I have collected over the past 2 yrs lots of rubble, rocks, broken brick etc. If I add rock/brick I'm wondering if I should use the smaller pieces in the soil cement? And at what point in the drying/curing should I add the urbanite in the top for the cob to hold onto? --- Lance Collins <collinsl at bigpond.net.au> wrote: <snipped> > > There is no definite answer to your question. It depends > on your > soil. Some years ago when I lived on sandy soil I used > soil with 5 > percent cement. > > With sand 5 percent is passable, 10 percent is OK and > more than that with > stones is on the way to proper concrete. > > You will have to make some sample blocks with varying > amounts of cement and > test them to see how much cement you need in your mix. > > > > God Bless America Francine __________________________________ Discover Yahoo! Find restaurants, movies, travel and more fun for the weekend. Check it out! http://discover.yahoo.com/weekend.html
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