abstract |
One embodiment comprises at least one Grade C fly ash; One or more alkali hydroxides; One or more phosphate sources; And a Grade C fly ash (CFA) cementitious composition with adjustable set time, comprising water. Alternative embodiments include one or more grade C fly ash; One or more alkali carbonates; One or more phosphate sources; And a grade C fly ash (CFA) cementitious composition with a solid activator, comprising water. |