My house was built in the late 70's with an in ground fire pit or some people call it a conversation pit. Its about 14' x 8' in front of the fire place. I would like to fill this in and make it level with the rest of the existing slab. Does anyone know how to best do this. I was going to drill into the existing slab and place re-bar in it sticking out about 1 foot. A contract suggested I put re-bar into the floor of the pit also. Any help would be greatly appreciated.