Adding a new layer of concrete over old concrete is a viable option if the existing concrete is in good condition. To ensure that the structure is robust and can last up to 40 years, it is important to thoroughly clean the old concrete surface and use a suitable concrete bonding agent before pouring the new concrete. Reinforcing bars can also be used to fix the new concrete to the old one, preventing it from cracking. When using a liquid adhesive agent, paint the adhesive onto existing concrete and allow it to dry until it is tacky.
On a warm day, the existing concrete surface will be warm enough to draw water from the repair material. If you want to bond wet concrete to dry concrete, you will need a bonding agent such as Liquid Nails or another construction adhesive. To prevent concrete from sticking to plastic buckets and tools, you should treat them with a mold release agent to prevent the concrete from sticking by forming a thin lubricating film on the material. If there are spills that have seeped into the floor surface, grinding or milling may be necessary to remove the upper few millimeters of the existing floor surface in order to clean the concrete.
A variety of Sakrete concrete repair products are available for repairing concrete that has started to deteriorate. Start by carefully sweeping away all loose stones and dirt and rinsing the concrete to prepare the surface. In order for concrete materials to bond effectively to each other, you must apply an adhesive bonding agent. In some cases, it may be necessary to remove the old concrete and resolve the underlying problem before continuing to lay new concrete.
This is also the case with floor repair and maintenance, where concrete fills the gaps resulting from damage. It is advisable to repair them as soon as they appear to prevent them from spreading or letting too much water into the concrete.
