Patent ID: 8518176
Filing Date: 2013-08-27
Classification: C04B,Y02W

Abstract:
1. A method for making a blended fly ash Portland cement composition, comprising: mixing together (A) Portland cement and (B) pre-hydrated, unponded fly ash in a cement to fly ash ratio (C:FA) of 95:5 to 21:79 by dry weight to obtain a mix; the Portland cement and pre-hydrated, unponded fly ash mix comprising a source of soluble sulfate in an amount sufficient to sustain hydration of the Portland cement when water is added to the mix to initiate hydration of the Portland cement; pre-hydrated, unponded fly ash having a total alkaline earth metal content, when expressed in terms of molar equivalent of calcium oxide, of at least 10% based on total weight of the fly ash; and the pre-hydrated, unponded fly ash being pre-hydrated