Can You Pour Concrete Over Old Concrete
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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.
Can you pour concrete over old concrete. There are cases when pouring new concrete over old just isn t a viable solution. Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan. Oil dirt and other debris can affect how the new concrete bonds with the old. When wouldn t i want to pour new concrete over old concrete.
The same principles as above apply to pouring concrete over an existing concrete driveway or sidewalk. The condition of the existing slab is the primary factor that determines how long the new concrete will last. On the contrary if your existing concrete is stable and elevating a few inches of its height won t hinder anything in the way then you can certainly get new concrete poured over the old one. A well poured concrete slab with a deep sturdy foundation can last for 30 to 40 years.
But make sure to leave this to professionals since you don t directly pour the layer of concrete. So you may ask if pouring new concrete over the old one is a better option. A well poured concrete slab with a deep sturdy foundation can last for 30 to 40 years. Fewer years of service.
Pouring concrete over an existing concrete driveway or sidewalk. The form shall extend above existing concrete surface based on the designated thickness of the new concrete. Install the form usually wood form around the perimeter of old concrete surface. You can if the concrete is sound solid with minor cracks pitting scaling surface damage or just plain ugly.
That kind of equipment can really punish a concrete floor. Before pouring concrete over existing concrete driveway or sidewalk surfaces remove stains and loose material so the new concrete can stick properly. Make sure that the height of the formwork is even.
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