Porous, permeable metal-cement based concretes and methods for making same

A method for manufacturing a porous, permeable concrete product, comprising:

• providing a metal-based cementing agent;
• providing an acid-based cement reacting agent of the form HnXOm, wherein “X” is an element selected from group consisting of phosphorous, carbon, sulfur and boron, “n” and “m” are selected so that the acid-based cement reacting agent is an acid, and “X” in the acid-based cement reacting agent will bond with the metal-based cementing agent to form a metal cement;
• providing an aggregate, the aggregate being defined by an exposed surface area having metallic aggregate linking elements thereon which can chemically bond with “X” in the presence of the acid-based cement reacting agent;
• providing a hydroxide-supplying additive;
• providing a supplemental liquid to enable mixing of components;
• combining and mixing together the metal-based cementing agent, the acid-based cement reacting agent, the hydroxide-supplying additive, the supplemental liquid and the aggregate to form a mixture;
• allowing the mixture to dry to a solidified unit;
• and
• heating the solidified unit to a temperature of between 300° F. and 550° F. for a period of time of between 30 minutes and 60 minutes per inch of thickness of the solidified unit to generate the porous, permeable concrete product.