How is Greenest Brick made? Does it require the use of any binder?
For fly ash that contains a large amount of calcium (e.g., Class C fly ash), the fly ash is cementious (i.e the fly ash reacts chemically with water in the same way that Portland cement does with water — a synonym of “cementious” would be “self-cementing.”) in nature, and no binder is required to make bricks or blocks at room temperature using such fly ash, and using ET’s patent pending process, which we chose to call it “Greenest Brick”. However, for fly ash that is low in calcium (ex. Class F fly ash), the fly ash is not cementious. It consists of mostly inert materials that don’t react chemically with water. In this case, it is necessary to add certain binder before bricks can be made at room temperature. Therefore, it is much easier and less costly to make fly ash brick using the room-temperature process (Greenest Brick) than if the fly ash is Class C rather than Class F.
