On Sunday, June 29, 2014 4:08:51 PM UTC-4, HerHusband wrote:
If I poured a 2" slab on top of the existing sidewalk, would it hold

up without cracking?



From my experience, no, but then the area commonly had sub-zero (F)

temperatures in the winter. That was years ago and the bonding agents

may have improved though.



That's what I figured, I was just hoping for the lazy solution.



My 3'x8' slab isn't that big, but it's 4"-6" thick and reinforced with

rebar. Unfortunately, I built it to last forever so it will take a bit more

work to tear out.



Better to do it right and not take shortcuts. I will tear out the existing

slab and pour a new one. I can always use the debris as fill in other

areas I need to build up.



Thanks for the feedback!



If it were me, I'd just go with the 2" on top. As
long as the concrete that is there is stable, I think
2" thick on top would be OK. And it's sure a PIA to
break up 4" thick concrete with rebar. And then what
do you do with it?