Can New Concrete Be Poured On Old Concrete

New concrete is commonly poured over old concrete which may have been damaged for any reason for repairing purpose.

Can new concrete be poured on old concrete.

When pouring new mix over old concrete make the mixture stiffer than usual by adding less water. Smooth the surface using a two by four or float then add texture as desired using tools or a broom. Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan. If you expect to pour concrete and use it in a couple days you can t.

You could drill holes into the existing concrete surface and insert steel pins and then the mesh on top. Concrete surface suffers from wearing and damages over time disregard of its strength. Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan. When the temperatures drop new concrete should be covered with concrete insulating blankets or in a pinch old household.

There s some things you have to take into consideration before you make your final decision though. The honest truth about this concrete patio make over. If done properly new concrete can often be poured right over an existing slab. A well poured concrete slab with a deep sturdy foundation can last for 30 to 40 years.

Placement of new concrete over old concrete shall be conducted according to a pre planned procedure in order to achieve desired final product. When i say bond the concrete you are lying on top off needs to be a rough finish like scabbled. The condition of the existing slab is the primary factor that determines how long the new concrete will last. Yes if done correctly you can pour new concrete right over existing concrete.

We d say no since concrete doesn t have any bonding agents of its own to grip onto the new layer but it s a yes if you get a layer in between the two and help the top layer adhere to the surface beneath. However this approach is not suitable option unless the existing concrete is in good shape structurally. Imperfections form when concrete hardens or sinks into the ground. Maybe and maybe not.

No matter how strong a slab of concrete seems it will wear out over time. Spread the new concrete over the surface filling the entire area within the form you created. Adding fresh concrete is a common way to level out old slabs and patch damage. The condition of the existing slab is the primary factor that determines how long the new concrete will last.

If you are laying pouring concrete over existing concrete there needs to be a bond. 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.