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.
Pouring concrete over existing concrete sidewalk.
Apply the new concrete over the primer.
Long and 4 in thick walk required just over 4 yds of concrete.
Hi there pouring a new sidewalk over an existing one is a problem waiting to be solved in a future edition of breaktime using concrete chunks as fill would also qualify for this honour sometimes the easy route works but most of the time it doesn t.
In addition to the concrete walkway cost suppliers usually add a short load charge for small orders generally under 3 yds.
A well poured concrete slab with a deep sturdy foundation can last for 30 to 40 years.
Disadvantages of pouring new concrete over existing concrete.
You can if the concrete is sound solid with minor cracks pitting scaling surface damage or just plain ugly.
Pouring concrete over an existing concrete driveway or sidewalk.
If the slab runs up to a door the raised surface may not provide the necessary clearance for the door to open.
The condition of the existing slab is the primary factor that determines how long the new concrete will last.
Pouring a new layer of concrete over an existing walkway patio or porch will raise the level by several inches.
Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan.
Make sure you have enough concrete to fill the entire area to the depth you desire.
Pour concrete onto the existing slab until it is around where you want the final level to be.
Your sidewalk will be stronger and last longer than many professionally poured sidewalks.