High strength, density controlled cold fusion concrete cementitious spray applied fireproofing

A sprayable, fire resistant, cold fusion concrete formulation containing a geopolymer cement that uses no liquid hydroxide additives as a primary activator or a pH elevator, and wherein said formulation exhibits an equilibrium density of less 60 pounds per cubic foot and a cured compressive strength above 1,000 pounds per square inch, said formulation comprising:

• 15-50 wt % of at least two aggregates of different sizes, each aggregate exhibiting a diameter ranging from about 0.025 mm to about 12.5 mm and having a bulk specific gravity of not greater than 0.60 and that when subject to temperatures in excess of 1,999° F. do not produce smoke, said lightweight aggregates being selected from the group consisting of silicon dioxide, expanded glass, manmade or coal combustion by-product cenospheres, vermiculite, volcanic cinders, expanded glass, glass bubbles, aluminum bubble, bottom ash, perlite, and expanded shale;
• 2-25 wt % of at least one geopolymer activator consisting of sodium metasilicate, potassium metasilicate, sodium pentahydrate, or potassium pentahydrate;
• 5-60 wt % of at least one geopolymer cementitious material comprising granulated ground blast furnace slag;
• up to 15 wt % of at least one set-time retarder comprising sodium tetraborate, sodium citrate dihydrate, citric acid, or boric acid;
• 0.05-5 wt % of a water retention and volume maintenance aid comprising at least one protein material or synthetic protein material comprising biomolecules, macromolecules, or amino acid residues;
• about 3 to about 9 pounds per cubic yard of at least one alkali-resistant fiber comprising fibers formed from glass, basalt, or ceramic;
• and
• water.