On Thu, 23 Jul 2015 23:10:28 +0000 (UTC), HerHusband
wrote in


I am curious if 2-1/2" is thick enough to avoid cracks if I pour over the
old walk?

If you use fiberglass flocking or metal wire (like fencing)
reinforcement within the concrete, you should be fine.
http://www.concretenetwork.com/glass...rced-concrete/
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