Can You Pour Concrete Over Concrete Slab You can if the concrete is sound solid with minor cracks pitting scaling surface damage or just plain ugly.

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Can you pour concrete over concrete slab But we all know how hard it is to maintain concrete surfaces.

Can you pour concrete over concrete slab. How i poured a concrete slab over an existing concrete porch slab. Before pouring concrete over existing concrete driveway or sidewalk surfaces remove stains and loose material so the new concrete can stick properly. They will consider the existing slab structurally sound and just pour the new slab as if they were pouring over a gravel base. My rule of thumb is this.

There may be another case where we are doing rcc raft over a layer of pcc. If this will end up being a thin layer it will start to chip and crack away in no time. You can do that but the existing slab must fulfill certain conditions to support a new concrete layer. If it is going to be a couple inches or more thick you may can drill the old slab and install some rebar sticking up to stop lateral movement but you really want a good 3 4 inches of concrete to stop cracks.

A well poured concrete slab with a deep sturdy foundation can last for 30 to 40 years. My objective was to create a new lev. The condition of the existing slab is the primary factor that determines how long the new concrete will last. Put on safety glasses and use a hammer and chisel to chip out oil stains or tree sap.

There are bonding agents that you can use. If the foundation beneath the slab is not sound the new concrete could sink or develop deep potholes. Main thing to take care is to have a continuity between the top and bottom layers of concrete. If the existing concrete is structurally sound is not heaving or settling then you can pour concrete over concrete.

Pouring concrete over an existing concrete driveway or sidewalk the same principles as above apply to pouring concrete over an existing concrete driveway or sidewalk. Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan. Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan. But even then they won t help much.

Pouring fresh concrete over old concrete is commonly needed. In most cases the answer is yes.

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