We're installing a latex-modified concrete overlay on a deteriorated bridge deck. However, the existing deck has several patches of magnesium-phosphate-cement mortar. Will we encounter any bond problems in these areas or any other problems with compatibility of these two materials?
We spoke to Bob Gulyas of Master Builders Inc. and he said that you should not experience any problems. Before placing the overlay, prepare the surface of the patches in the same manner as the rest of the deck.