You can lay new concrete on top of old concrete. However, unsolved problems with old concrete, such as cracks or frost, will be transferred to new concrete if not fixed. In addition, you need to pour it at least 2 inches thick. The simple answer is YES, you can pour new concrete over existing concrete. Just ask your local concreting canberra professionals for assistance if needed.
A well-poured concrete slab with a solid and deep base can last from 30 to 40 years. Pouring concrete over old concrete rather than directly onto a new gravel base limits the ability to maximize slab life. 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.
Serious structural problems in the original slab will eventually affect the new concrete layer as well, and it will have to replace the new concrete along with the old one. Leaving tree roots in concrete will cause concrete to weaken and crack through the slab if the root grows. Although it is not the best option, adding a new layer of concrete over the old concrete is still the best option. The two pieces of concrete will not make a perfect bond; however, following the instructions correctly and using a suitable adhesive agent will make the concrete strong and sufficiently bonded.
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. New concrete will likely shrink at a different rate than existing concrete if mix designs are not carefully combined. Pouring fresh concrete over existing concrete is a common way to level old slabs and repair damage. If you simply pour new concrete on it and don't fix the problem, the same thing will most likely happen with new concrete.
Fresh concrete does not adhere well to existing dry concrete because it does not contain any natural bonding agent. Technically, you could cover existing concrete with a layer of concrete only a few millimeters thick - this is called a screed. Let's take a look at other downsides of using old concrete as a filler for new concrete to help you decide if it's the right choice for your project. Embossed concrete is also called textured or printed concrete and reproduces other materials such as brick, stone or wood.
The thinnest concrete layer you need to pour over existing concrete for paths or patios is two inches. Dynamic Concrete Pumping has more than 40 years of combined experience in commercial and industrial concrete construction. This adhesive agent will be painted over the old concrete to ensure that the new concrete adheres successfully.