Thanks CVG, I guess I was not clear. Water distribution pipe is installed in the usual manner, in Colo. 5 feet down, bedded with Granular material. backfilled and compacted. The compaction is tested. The recycled concrete is used as a roadbase for a composite section with for instance, 8 inches...
A guy I work with came back from a seminar with this, and is fixated on this. We have been allowing recycled concrete for use as subgrade, and now this guy thinks our ductile iron pipes will be falling apart.
Anyone every heard of this? Had any experience with it? Know any resources I can...
I agree with Btrueblood,gaskets often are displaced slightly when the spicket is pushed into the bell. Adding pressure returns them to the intended postion. You might also google "allowable leakage", it is a formula we use when testing pipe. good luck
