Cob Ferro-cement-Lime in clay

[Otherfish at aol.com]

Jud
I did a small foundation of busted concrete slab mortared with cob
worked fine until sombody nicked it with a car
-busted out a chunk
-wouldn't have happened with a cement mortar
-this sez to me
cob is fine as a mass material
(that's where it is strong - as a mass structure)
mortar joints are too thin - too streched out to be effectively done with
something as low strength as cob

traditionally lime / sand mortars have been used with success

use of the appropriate material for the task is the moral of the story

regards
john fordice
TCCP
otherfish at aol.com