Can You Pour Concrete Over Existing Concrete
Olivia Luz
Make sure you have enough concrete to fill the entire area to the depth you desire.
Add all of the concrete right away so none of the mixture has a chance to dry out. Pouring concrete over an existing concrete slab how to bond them together they always say rome was not built in one day and this was the place that changed the looks of architectural structures that we see today. I ve had the misfortune of having to remove far too much of it over the years as it cracks and flakes. Pouring over old concrete need similar basic formworks that employed with fresh pours.
Pouring a new layer of concrete over an existing walkway patio or porch will raise the level by several inches. The condition of the existing slab is the primary factor that determines how long the new concrete will last. When i say bond the concrete you are lying on top off needs to be a rough finish like scabbled. The form shall extend above existing concrete surface based on the designated thickness of the new concrete.
Make sure that the height of the formwork is even. 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. Yes if done correctly you can pour new concrete right over existing concrete.
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Even though concrete is strong and forms a hard structure there s nothing in it that helps it stick to old concrete. Disadvantages of pouring new concrete over existing concrete. The key to successfully pouring concrete over an existing concrete surface is to ensure the two layers bond properly. A commercial bonding agent helps with that.
Pour concrete onto the existing slab until it is around where you want the final level to be. It can be painted on or applied with a rag. You could drill holes into the existing concrete surface and insert steel pins and then the mesh on top. However proper prep work is needed.
A well poured concrete slab with a deep sturdy foundation can last for 30 to 40 years. Apply the new concrete over the primer. You can easily pour over the existing concrete but please don t use fibermesh concrete. There s some things you have to take into consideration before you make your final decision though.
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