Patent ID: 7243921

Claim:
A method of providing an additive in a self-dispensing form for stabilizing a projectile-trapping medium and passivating spent projectiles trapped therein, comprising: selecting at least one dry component from the group consisting of low-solubility phosphate compounds, low-solubility aluminum compounds, iron compounds, sulfate compounds, and calcium carbonate; selecting at least one cementing material; providing water; mixing substantially stoichiometric amounts of said dry components, said cementing material, and said water to yield a workable paste; wherein said mixing substantially stoichiometric amounts of said dry components, said cementing material, and said water comprises mixing about one part by mass said low-solubility phosphate compound, about one part by mass said cementing material, and about 0.4 parts by mass said water; adding a quantity of an aqueous-based foam to said paste to form a slurry, wherein the quantity of said foam is sufficient to yield a density of said additive sufficiently high to prevent buoyancy of said additive and sufficiently low to prevent said additive from sinking in said projectile-trapping medium; casting said slurry in at least one mold suitable to establish said form; at least partially curing said slurry in said mold; and removing said cured slurry from said mold to yield said self-dispensing form.