If the existing concrete is structurally in good shape, you can pour new concrete over it to refresh it. Proper preparation work is key to success when laying new concrete layers on top of old concrete. You can place new concrete on old concrete. However, unresolved issues with old concrete, such as cracks or frost, will carry over to new concrete if left unresolved.
In addition, you should pour it at least 2 inches thick. Like everything else in the world, concrete also has a useful life and wears out over time. Imperfections form when concrete hardens or sinks into the ground. Pouring fresh concrete over existing concrete is a common way to level old slabs and patch damage.
The simple answer is YES, new concrete can be poured over existing concrete. However, there are a few things you need to consider before making a final decision. Cementing on old cement will not cause any problems to the existing structure, as long as the old concrete is free of major damage, such as large cracks or frost elevations. Your path can gain a new life by adding a new layer of concrete on top, no need to dig up the existing path and start from scratch.
Remember to clean the walkway of any hidden debris first. Another consideration is the height and depth of the concrete surface. Pouring concrete into an existing slab or path will result in a concrete surface several inches higher than before. This could prevent doors from opening and closing, cause misalignment with stairs, or even create a trip hazard, so consider these aspects when planning your project.
According to Concrete Network, this can be done, but again precautions must be taken to ensure that the existing surface is up to the task. Every time new concrete has to be attached to old concrete, cracks are likely to form and sections begin to separate. If the base under the slab is not solid, new concrete could sink or develop deep potholes. Many people will tell you that you should only replace concrete instead of re-paving, but it may not need to be replaced.
However, with slabs that will be exposed to vehicle traffic, the concrete is thicker and no bond breaker is used, so the top slab is joined to the existing slab. For example, if you have large working cracks in the slab, and the concrete has settled to the point of being on several different levels, you should remove it. But it's important to remember that the new concrete layer will only be as stable and durable as the original slab under it. You can do this if the concrete is solid (solid) with small cracks, pitting, scale, surface damage, or just ugly.
Pouring a new layer of concrete over an existing walkway, patio or porch will raise the level by several centimeters. A bonding adhesive is used on the concrete to ensure that the new concrete adheres properly to the existing concrete. Heavy concrete, of course, will use heavier rebar, but smaller concrete, such as the sidewalk or driveway, will only require about half an inch of rebar. As the popularity of polished concrete floors increases, a growing number of homeowners are also looking to cover old tiles.
Whether you decide to pour concrete onto an existing surface or start from scratch, Geostone offers durable and long-lasting decorative concrete solutions with a warm and welcoming appeal. In each of these situations, you must remove old concrete, resolve the existing problem, such as removing tree roots, and continuing with new concrete. I have concrete courses that teach you how to form, pour, trowel a concrete slab, how to stamp concrete, epoxy coatings, repair cracks in foundations. .