repairing a damaged rubble stone foundation
I am jacking up a 100 year old house that was built on a dry rubble foundation with mortared faces above grade. I want to pour a concrete bond beam over the existing foundation. Is this a bad idea? I have read that these types of foundations are very sensetive to the introduction of modern high strength mortars. I have found several voids in the interior of the foundation, thus the thought of a bond beam to bridge possible voids. Should these be repaired and if so what kind of mortar should i use? We have very hard rocks here so I was thinking type s. Any incite will be greatly appreciated.