초록 ▼

Bonded aggregate compositions such as concrete, concrete repair products, high temperature refractories, high temperature insulation and fire resistant insulation are made from an aqueous solution of phosphoric acid and a separate, storable dry mixture of suitable aggregate, monocalcium phosphate, a

Bonded aggregate compositions such as concrete, concrete repair products, high temperature refractories, high temperature insulation and fire resistant insulation are made from an aqueous solution of phosphoric acid and a separate, storable dry mixture of suitable aggregate, monocalcium phosphate, and calcium in the form of calcium aluminate cement or calcium oxide. The proportion of wet to dry constituents is variable so as to select the working time and strength of the aggregate composition, typically on the order of ten to fifteen minutes. The mixture of the preferred dry constituents, and the binder to be mixed with the aggregate to yield the preferred dry mixture, are also disclosed. The binder system is particularly advantageous in that the same set of binder constituents can readily be employed with a variety of aggregates, reducing the cost of providing a variety of aggregate compositions due to the ready availability of the raw materials and obviating the need to stock different binders for different aggregate compositions. Cost is additionally reduced through the use of less purified, and therefore less expensive constituents.

대표청구항 ▼

1. 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; and a dry component comprising CaO

1. 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; 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 between 0.8 and 1.0 percent by weight of said binder.