Concrete Over Old Concrete

However this approach is not suitable option unless the existing concrete is in good shape structurally.

Concrete over old concrete. Steps involved in pouring concrete over existing concrete slab step 1. The condition of the existing slab is the primary factor that determines how long the new concrete will last. It rolls or brushes on like paint very easy to install creates a bond between the old new concrete floors. This includes removing sand dead leaves and gravel.

Concrete surface suffers from wearing and damages over time disregard of its strength. One of the best tools that can be clean all the debris out of crack is a stiff bristle broom. Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan. If done properly new concrete can often be poured right over an existing slab.

Make sure the braces are level and lay down a barrier of wire mesh over the existing concrete inside of the barrier. If you re concrete has large cracks and the slab may still be moving due to freeze and thaw conditions or settling then a tear out and replace is a better solution. Smooth the surface using a two by four or float then add texture as desired using tools or a broom. When we pour concrete floors over existing concrete floors and the new floor is less than 3 inches thick we use a product called weld crete to bond the two floors together.

Layering new concrete over old isn t a durable option only when the materials used are of poor quality or if one skips the binding procedure. New concrete is commonly poured over old concrete which may have been damaged for any reason for repairing purpose. The acid can cause. To lay new concrete sweep and clean the old concrete and saturate the old concrete with water.

If the foundation beneath the slab is not sound the new concrete could sink or develop deep potholes. Pour the mixture directly from the bucket or use a plastic sprinkler can to distribute it over the old concrete. For this to be feasible the contractor needs to pour at least 2 inches thick use smaller aggregate and incorporate reinforcement such as welded wire mesh or fiber mixed into the concrete. Placement of new concrete over old concrete.

Cleaning old concrete surface. Then build a perimeter or a wood brace that is the same height as you want the concrete to be. There are cases when pouring new concrete over old just isn t a viable solution. When pouring new mix over old concrete make the mixture stiffer than usual by adding less water.

Pour the acid mixture over the old concrete. When wouldn t i want to pour new concrete over old concrete. Be sure to cover all of the concrete evenly. Sweeping dirt s debris over the existing concrete slab will allow bonding to take place.