You can if the concrete is sound solid with minor cracks pitting scaling surface damage or just plain ugly.
Pouring concrete over existing concrete sidewalk.
Long and 4 in thick walk required just over 4 yds of concrete.
Disadvantages of pouring new concrete over existing concrete.
Pouring concrete over an existing concrete driveway or sidewalk.
Apply the new concrete over the primer.
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.
If the slab runs up to a door the raised surface may not provide the necessary clearance for the door to open.
Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan.
Your sidewalk will be stronger and last longer than many professionally poured sidewalks.
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.
Pour concrete onto the existing slab until it is around where you want the final level to be.
The same principles as above apply to pouring concrete over an existing concrete driveway or sidewalk.
A well poured concrete slab with a deep sturdy foundation can last for 30 to 40 years.
Pouring a new layer of concrete over an existing walkway patio or porch will raise the level by several inches.
Add all of the concrete right away so none of the mixture has a chance to dry out.
Make sure you have enough concrete to fill the entire area to the depth you desire.