Can You Pour Concrete On Top Of Concrete
Camila Farah
Watch the liquid in the center of the level to make sure the bubble stays in the center.
Best practice is to remove all vegetative material from underneath any pour because it will deteriorate and allow space between the soil and concrete which in turn reduces the support underneath. Overlays may include polymers portland cement concrete or epoxies. Dump out all of the concrete onto the old concrete and spread it out with a hand trowel or a paver to form an even layer. The process of pouring new concrete step 1.
You need to consider the added height and weight of the overlay on the existing structure. Can you pour new concrete over existing concrete. Yes you may pour a concrete pad overlay over an existing slab. In most cases the answer is yes.
My rule of thumb is this. If the foundation beneath the slab is not sound the new concrete could sink or develop deep potholes. The condition of the existing slab is the primary factor that determines how long the new concrete will last. It depends on how big of a slab you are pouring and what you intend to put on top of the slab.
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When i say bond the concrete you are lying on top off needs to be a rough finish like scabbled. Finishing operation shall be conducted at suitable time otherwise cracks might initiate. You can sweep off the dirt or debris on the existing surface use a pressure washer if there are stubborn stains or apply chemical based cleaners to scrub any remaining marks and leave the surface all wet. A completely dry surface won t make an ideal canvas to work on.
In hot weather condition the concrete can dry out very quickly so finishing work shall be performed quickly after pouring is finished. You could drill holes into the existing concrete surface and insert steel pins and then the mesh on top. If the new concrete is 3 inches thick or more you don t have to bond the new concrete to the old concrete. Pour the new concrete on top of the old concrete.
Set the level on top of each board 1 at a time. If the existing concrete is structurally sound is not heaving or settling then you can pour concrete over concrete. If the concrete isn t structurally sound pouring new concrete over it only offers a temporary fix. Smooth concrete surface with trowel and wood float can be used to float the concrete.
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In some cases it s better to replace damaged concrete than to pour fresh concrete over top. Eventually those same problems will return and you may need to replace the concrete anyway. Finish poured concrete surface. Concrete over concrete by.
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