GS interviewed by Alan Kohler, page-96

On the other hand successfully completed multi year trials for roads and bridges and marine applications at the Ports of Augusta coupled with increased infra structure spending could lead to increased revenue. The problem is not so much that Edencrete is too expensive (it's price is comparable to other additives on the market) but that infra structure maintenance has been neglected in the US for decades, so the opportunities for Edencrete have been reduced.
Hopefully the recent infrastructe spending push will help along with a desire to use environmentally friendly solutions.