The same principles as above apply to pouring concrete over an existing concrete driveway or sidewalk.
Can you pour concrete over old concrete driveway.
There are cases when pouring new concrete over old just isn t a viable solution.
No matter how hard concrete gets or how strong it is there is nothing that can stick it to the older surface.
That kind of equipment can really punish a concrete floor.
Oil dirt and other debris can affect how the new concrete bonds with the old.
Your best bet is going to be to tear up the old concrete before pouring the asphalt.
By the way it will take you much longer to break up two layers of poured concrete in the future cost you more if someone else does it and the work put in the second slab will be a.
Make sure that the height of the formwork is even.
When wouldn t i want to pour new concrete over old concrete.
Call tucker paving for your new driveway when you are ready to transition your old concrete driveway into a new asphalt one give tucker paving a call.
The form shall extend above existing concrete surface based on the designated thickness of the new concrete.
For this to be feasible the contractor needs to pour at least 2 inches thick use smaller aggregate and incorporate reinforcement such as welded wire mesh or fiber mixed into the concrete.
So fyi can you pour new concrete on top of old yes but it will not solve your problem and look nearly the same as the old concrete in a short period of time.
Pouring concrete over an existing concrete driveway or sidewalk.
You can if the concrete is sound solid with minor cracks pitting scaling surface damage or just plain ugly.
Pouring over old concrete need similar basic formworks that employed with fresh pours.
If you re concrete has large cracks and the slab may still be moving due to freeze and thaw conditions or settling then a tear out and replace is a better solution.
These joints can turn into cracks in the asphalt which will necessitate expensive and time consuming repairs.
If done properly new concrete can often be poured right over an existing slab.