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Cob Re: lime:clay ratioMark A Hoberecht Scarecrow at lerc.nasa.govMon Oct 26 15:29:08 CST 1998
At 10:24 AM 10/26/98 +0100, you (crtaylor) wrote: > >You can use a store bought hydrated type n bag lime, mix 1:3 lime:clay >(dry) and test some premade batches to see Harry (CALXA) recommend curing >small blocks at 140 degrees in the oven for 24 hours to get a 90 day dry >cure result example. try it before you get to the use stage, then decide, >it may provide more long term protectiion than straght cob. > Charmaine, Are you sure the lime/clay mix has no aggregrate (sand) in it? I know a typical lime mortar mix is <1 lime:3 sand>, and I've used earth plaster mixes of <1 clay:3 sand> with good success (cob also about the same proportions, plus straw), but it seems to me that without some type of aggregate to go with the 3 parts clay (not just 1 part lime), you'll get some significant shrinkage cracks. Any thoughts?
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