Hello - PVC cement, or portland ? It doesnt matter much - pvc cement is pretty much a done deal, the best you can do is to try pvc cleaner to soften it. Its nearly impossible to remove it without making a huge mess.
Portland cement should just chip off.
If you have more specifics associated with this let me know and I'll figure out a solution.
Hello - I'm sorry to hear this type of situation. Muriatic acid will clean concrete, but I don't think you want to try using it to disolve it in this instance. How I would go about this repair depends on if you know (almost exactly) where the problem section is, how deep in the ground it is located, is it located under the basement floor, or garage floor or ??
IF it is a straight shot to the problem from where the pipe exits the house you may be able to cut the pipe inside and get in (with a long enough) something to bust up the cement ??
If you know where it is, I would figure the easiest, cost effective method and fix the joint. anything else is asking for trouble. Get back to me if you know where it is located and we'll figure out some options for you.
Hello - You may be able to get at it from the front toilet ?? Am I to understand this is on a slab ? (no basement) How far in from the edge of the slab is it ?
The problem with going UNDER the slab to repair is the added expense of machinery and labor to operate it. You also need to be careful to fill the excavated area and compact it properly. (If the pipe is BURIED in cement this method will be harder )
The problem with going through the TOP is if this is a "finished" living space, the flooring will need to be pulled (or replaced) also if the affected area is under a wall it makes it a little trickier.
If this were a basement floor - I would cut a hole and fix the pipe and patch it in. I realize this is taking awhile but I think we're just about to the end.