JL, Tend to agree that there are more exciting uses for Zen's graphene than as a concrete additive.  But it begins to look viable and competitive for Ultra High Strength Concrete that normally costs $2,500/yd and used in extraordinarily high structures and bridges - which require 36,360 psi concrete (verses 4,000 psi concrete for sidewalks,etc that cost $130/yd). 

My math indicates that Zen's graphene additive for UHS Concrete would be competitive if it could be supplied for $312/oz.  In the end, not too shabby for the lower end of Zen's graphene product mix if the costs to produce are less. IMO, this very well may be possible and desirable. 

Desirable, because well rounded, graphene product offerings across many different market segments would be a huge benefit to the company.

Cheers, J