Add all of the concrete right away so none of the mixture has a chance to dry out.
Pouring concrete over existing concrete driveway.
Apply the new concrete over the primer.
Over the course of my 20 year contracting career i ve poured countless 2 inch caps over existing concrete with no problems.
You can if the concrete is sound solid with minor cracks pitting scaling surface damage or just plain ugly.
Steps involved in pouring concrete over existing concrete slab step 1.
How to pour concrete over existing concrete slab step by step process how to pour concrete over existing concrete slab how to pour concrete over existing con.
If the concrete has multiple deep cracks extending all the way through its depth pouring concrete over existing sidewalk driveway or patio surfaces generally is a waste of time.
Pouring concrete over an existing concrete driveway or sidewalk.
Make sure you have enough concrete to fill the entire area to the depth you desire.
The new concrete certainly isn t going to float up in the air or slide off.
One of the best tools that can be clean all the debris out of crack is a stiff bristle broom.
Sweeping dirt s debris over the existing concrete slab will allow bonding to take place.
If you decide to use a portland cement latex modified or epoxy modified concrete overlay carefully follow the.
Here s the catch if the existing surface is somewhat in a structurally sound shape and elevating its height to a few inches won t be a problem you can certainly freshen it up with a new layer of concrete.
However proper prep work is needed.
The condition of the existing slab is the primary factor that determines how long the new concrete will last.
Concrete is poured with expansion joints that allow room for the pavement to expand in hot weather.
Cleaning old concrete surface.
Yes you may pour a concrete pad overlay over an existing slab.
Overlays may include polymers portland cement concrete or epoxies.
Pouring concrete over the existing one.
This includes removing sand dead leaves and gravel.
Asphalt driveways that are paved over an appropriately compacted subbase will always be superior to asphalt that is laid over an unstable base or concrete that is prone to shifting and expansion.
Pour concrete onto the existing slab until it is around where you want the final level to be.
Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan.
The same principles as above apply to pouring concrete over an existing concrete driveway or sidewalk.
By the same token if you attempt to clean the surface and the concrete just keeps breaking apart into bits of sand and gravel replacement is your best option.