Patent ID: 8137490

Claim:
A method of making a blast resistant panel comprising: preparing a self leveling cementitious aqueous mixture of 25-45 weight % inorganic cement binder, an absence of silica flour, 35-65 weight % sand having a particle size of about 150-450 microns, 5-15 weight % pozzolanic filler having a median particle size of less than or equal to 50 microns, 0.25-5.0 weight % polycarboxylate based self-leveling agent, and 6-12 weight % water, forming the uniform mixture into a fiber reinforced cementitious panel; curing the fiber reinforced cementitious panel to produced a partially hardened cementitious panel, sanding the surfaces of the partially hardened cementitious panel, cutting the partially hardened cementitious panel to a desired size, curing the partially hardened cementitious panel to a final hardened cementitious panel.