Cover moldy wood floor with concrete?

Update: Really would mold actually go through cement? That is exactly what I am wondering. We want to fix the mold problem properly however want to work with and be in contact with the mold as little as possible. Was hoping we could just encase it in concrete. The weight won't be a problem . It sits on metal joists.
Update 2: Yes I suppose you're right, it would eventually eat through the plywood. It would take while but it would happen. We'll pull the floor first and pour the concrete.
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