Material, and method of producing it, for immobilizing heavy metals later entrained therein

An improved heavy metal immobilizing structural material for use in a structural component, said structural component comprising:

• cement;
• fine aggregate;
• foam;
• at least one fiber selected from the group consisting of a natural fiber, a synthetic fiber and a steel fiber;
• and
• calcium phosphate in an amount sufficient to provide an erosion deterrent coating on heavy metal particles that are later entrained in said concrete,
• wherein the improvement comprises,
• the addition of an aluminum compound in an amount sufficient to enhance said erosion deterrent surface of said heavy metal particles,
• wherein said aluminum compound facilitates the formation of a sticky gel on the surfaces in immediate contact with said heavy metals and further entrains fine particles that may contain said heavy metals.

An improved heavy metal immobilizing structural material for use in a structural component, comprising:

• about 1 part by mass Portland cement;
• about 1 part by mass crushed limestone;
• a determinable quantity of foam based on pre-selected criteria;
• a pre-selected quantity of a fiber selected from the group consisting of a natural fiber, a synthetic fiber and a steel fiber;
• and
• about 0.05 part calcium phosphate by mass,
• wherein the improvement comprises:
• the addition of about at least 0.065 parts by mass of an aluminum compound,
• wherein said aluminum compound facilitates the formation of a sticky gel on the surfaces in immediate contact with said heavy metals and further entrains fine particles that may contain said heavy metals.