Method for the production of cementitious compositions and aggregate derivatives from said compositions, and cementitious compositions and aggregates produced thereby

In a method of preparing synthetic shaped cementitious compositions having high quality even without the addition of high energy binders such as portland cement, the steps which comprise:

• (a) collecting and admixing the spent residue from a fluidized combustion bed of the type wherein limestone particles are suspended in a fluidized medium and sulfur oxides are captured and pulverized coal fly ash,
• (b) adding controlled amounts of water to said residue-fly ash mixture,
• (c) compacting and forming the mixture produced as a result of step (b) to the desired shape, and
• (d) curing the shaped article, whereby the article, even if prepared without any such high energy binder, has a Los Angeles Rattler abrasion resistance of less than 50%.