I have an asphalt driveway and a concrete area at the bottom of my back steps that abuts the asphalt driveway. The concrete area is lower than the driveway and water pools from rain or melting. In the winter it is especially problematical as it melts and refreezes and makes for dangerous walking. Is there anyway to remedy this? I want to make the area at the foot of the steps higher. I have been told that you cannot add another layer of concrete on top of an existing layer. Help please.