Concrete Slab Reinforcement Rippling
Concrete Slab Reinforcement Rippling
(OP)
I have a slab on grade that has experienced reinforcement rippling (the slab is higher over the reinforcement than between the reinforcement). Two questions: 1) How does this occur? Air voids below the bars? Bad vibration technique? 2) how can this be prevented? Thanks for any advice!
Rob
Rob






RE: Concrete Slab Reinforcement Rippling
Did you look very close or throw some water on the slab to see if there are cracks in the raised portion?
This could be the result of the result of plastic settlement in/around the reinforcing bars.
RE: Concrete Slab Reinforcement Rippling
Wish I could get that many "results" at work
RE: Concrete Slab Reinforcement Rippling
RE: Concrete Slab Reinforcement Rippling
Look first at Toad's suggestion...it is the more likely.
RE: Concrete Slab Reinforcement Rippling
It guys it is possible that the concrete got a little hot during placement and prevented good consolidation.
I could be wrong, but I also thought this was only a problem on thick pours.
How think is the slab?
How big are the bars?
RE: Concrete Slab Reinforcement Rippling
RE: Concrete Slab Reinforcement Rippling
RE: Concrete Slab Reinforcement Rippling
RE: Concrete Slab Reinforcement Rippling
RE: Concrete Slab Reinforcement Rippling
I would cut a core directly over one of the rebars. The diameter of the core should be at least 4 inches (you're not using it for compressive strength, so L/D doesn't matter). Cross-section the core and you'll be able to see the issues.
RE: Concrete Slab Reinforcement Rippling
RE: Concrete Slab Reinforcement Rippling
RE: Concrete Slab Reinforcement Rippling
RE: Concrete Slab Reinforcement Rippling
RE: Concrete Slab Reinforcement Rippling