Ann: Second Lab Trial Produces Geopolymer Concrete, page-3

That appears to answer the question posed by Hatmotpit after the previous announcement. The recipes they are coming up with do not have any OPC in them and that is what making the co2 reductions. Great to see that the addition of flyash reduces the CO2 emissions even further and will increase our maximum output of kaolin by diluting it and reducing the cost. The only issue i foresee with using flyash is that once people realise the waste product is useful, the price of said waste product will increase. Can you imagine if this all works out and we can start selling this stuff to concrete manufacturers or start producing it ourselves. We have two supplies on the East coast and one on the west coast. We could end up being the main supplier for green concrete in Australia and that should read ALL concrete in Australia as once the concept is proven and running commercially, no-one will be allowed to produce dirty high polluting concrete for use when there is an alternative with such large reductions in CO2. Happy days ahead