Patent ID: 7892479
Filing Date: 2011-02-22
Classification: C04B,Y02P,Y10S

Abstract:
1. A method of forming a shaped article having a matrix containing sintered fly ash, said method comprising the steps of: blending fly ash together with water to produce a fly ash dough; forming a green article in a desired shape from the fly ash dough; curing the green article to at least partially solidify the article at between 30-80° C. and 20%-60% relative humidity; and firing the green article so that the shaped article is hardened by sintering its fly ash matrix; wherein the water is added in excess of that which is absorbed by the fly ash so that the dough contains free water so as to be in at least a partially fluid state; and removing at least a portion of the free water from the fly ash dough during and/or after forming of the green article.