Bonded aggregate composition and binders for the same

A method for forming a bonded aggregate structure, said method comprising the steps of:

• admixing a wet or aqueous phosphate-providing component with a dry aggregate composition to form a mixture, said dry aggregate composition containing an aggregate and a binder component, said binder component comprising CaO,Al2O3,SiO2, and Fe2O3 in proportions adequate to yield a settable mixture, wherein said Fe2O3 comprises between 0.8 and 1.0 percent by weight of said mixture;
• and
• allowing said mixture to set.

The method of claim, 15, wherein the heat-containing vessel is a kiln.

A binder useful for bonding an aggregate into a rigid structure upon mixing and setting of said binder said aggregate, said binder comprising:

• an acidic phosphate-providing component, said component being in a liquid phase at ambient temperature and pressure;
• and
• a dry component comprising CaO,Al2O3,SiO2, and Fe2O3 in proportions adequate to allow working upon mixing of said binder and said aggregate and adequate to yield a rigid structure upon setting of said mixed binder and aggregate, wherein said Fe2O3 comprises approximately 1.0 percent by weight.

A binder useful for bonding aggregate into a rigid structure upon mixing and setting of said binder and said aggregate, said binder comprising:

• an acidic phosphate-providing component, said component being in a liquid phase at ambient temperature and pressure and comprising SO4;
• and
• a dry component comprising CaO,Al2O3,SiO2, and Fe2O3 in proportions adequate to allow working upon mixing of said binder and said aggregate and adequate to yield a rigid structure upon setting of said mixed binder and aggregate.

A binder useful for bonding an aggregate into a rigid structure upon mixing and setting of said binder and said aggregate, said binder comprising:

• an acidic phosphate-providing component, said component being in a liquid phase at ambient temperature and pressure, said phosphate-providing component having a specific gravity between approximately 1.14-1.71;
• and
• a dry component comprising CaO,Al2O3,SiO2, and Fe2O3 in proportions adequate to allow working upon mixing of said binder and said aggregate and adequate to yield a rigid structure upon setting of said mixed binder and aggregate.