Wishful,  We need to factor in the tradeoffs for useing less concrete.  But you're correct that we have scant information on the costs to process the graphene. I suspect there will be a range of processing costs depending on purity or molecular specification for end product use.

In any case, it's clear that we'll need a price point well below G's quoted range for use as a concrete additive.  Still could be feasible if the Albany graphite needs only sonification to produce dirty graphene. :-)