LIGHTWEIGHT "MINERAL FOAM" COMPOSITE MATERIALS AND METHODS OF MAKING AND USING SUCH COMPOSITE MATERI

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Lightweight "mineral foam" composite materials from reactive metal oxides a re disclosed. Said materials result from a reaction of metal oxide(s), phosphate(s) and residual materials to which are added a reactive foaming agent to provide enhanced physical properties. The metal oxide may comprise MgO, CaO, ZnO, TiO2 or the like. Said phosphate(s) may comprise mono-potassium phosphate, mono-ammonium phosphate, mono-sodium phosphate, liquid polyphosphates or the like. Said residual material may be fly ash, mine tailing slurries, mining waste, agricultural fibers or the like. The composite materials disclosed in the instant invention will have a density of between 0.35 to 2.25 g/cc and may be used for many applications including, p re- cast structures, in-situ structures, insulating blocks, slabs and composite wall sections, light weight spheres, mixes and coatings.