How to Add Concrete to Existing Concrete

Adding new concrete to existing concrete can be done in several ways depending on the situation and the purpose of the project. Here are some steps to follow:

1. Clean the existing concrete surface thoroughly. Use a pressure washer or a scrub brush to remove any dirt, debris, or loose material. Allow the surface to dry completely.

2. If the existing concrete surface is smooth, use a chipping hammer or a grinder to roughen it up. This will help the new concrete bond better with the old surface.

3. Apply a bonding agent to the existing concrete surface. This will create a chemical bond between the old and new concrete, ensuring a strong and durable bond.

4. Mix the new concrete according to the manufacturer's instructions. It's important to use the right type of concrete for the job. For example, if you're adding concrete to a driveway, use a high-strength concrete mix that can withstand heavy traffic.

5. Pour the new concrete onto the existing surface. Use a trowel to spread the concrete evenly and level it out. Make sure the new concrete is at least 1 inch thick to ensure a strong bond.

6. Smooth out the surface of the new concrete using a float or a trowel. Use a broom to create a non-slip texture on the surface if desired.

7. Allow the new concrete to dry and cure according to the manufacturer's instructions. This may take several days depending on the weather conditions.

8. Once the new concrete has cured, seal the surface with a concrete sealer to protect it from water and other elements.

It's important to note that adding new concrete to existing concrete may not always be the best solution. In some cases, it may be more appropriate to replace the entire concrete surface rather than patching it. Additionally, adding concrete to an old and weakened surface may not necessarily increase its strength or durability. In such cases, it's recommended to consult with a professional to determine the best course of action.