Use wooden braces or reinforcing mesh to place it over existing concrete. Use a concrete bonding agent to spread over existing slabs to help form a bond between the old and new concrete layer. Pour over the new concrete to the desired thickness and level the surface with a trowel. The simple answer is YES, you can pour new concrete over existing concrete.
You can add new concrete to an existing concrete slab if the old concrete is in good condition. You will need to thoroughly clean the old concrete surface and use a suitable concrete bonding agent before pouring the new concrete to meet all structural requirements. Although it is possible to bond new concrete to old concrete, it is important to do it the right way to prevent any cracks or gaps from fixing too quickly. For large projects, coarse aggregates have large gravel and are more durable, ensuring that the concrete is stronger and more durable.
Therefore, you need to pour a new layer on top of the existing concrete to stamp the concrete, but make sure that the existing concrete is in good condition. This patio slab was 4 inches thick next to the house and 1.5 - 2 inches thick towards the lawn, so I decided to glue it all to the existing concrete. Many people will tell you that you should only replace concrete instead of resurfacing, but replacement may not be necessary. It is essential to properly prepare and clean the existing slab before placing the new concrete on top.
You may need to ask some helpers for help to help you with the process of laying new concrete and stamping it. While it is possible to use old concrete as the base for new concrete, many factors will determine if the concrete is strong enough to fit the new batch. That said, you should know what you're doing before you deal with the new concrete that binds existing concrete together. To prevent the newly laid concrete from early wear, a protective layer is applied by using a curing compound and sprayed all over the surface, which usually takes seven days to cure.
I started this project by pressure washing the old concrete to remove all the mold, dirt and loose concrete. Pouring over the old concrete instead of having to demonstrate and remove it, ended up saving the customer hundreds of dollars. Pouring a new layer of concrete over an existing walkway, patio or porch will raise the level by several centimeters. For this reason, the concrete used to fill the pothole must be carefully designed and applied a protective layer on the area between the repair and the existing slab.
If you added a few inches of concrete to a walkway leading to your driveway, you could create a tripping hazard for people who don't realize the gap. The same is true when existing concrete has settled so that it now extends over several levels or when tree roots cause it to move or crack.