Patent ID: 8016938

Claim:
A structure incorporating components of concrete having a combination of strength and toughness to resist blast and penetration by ballistic fragments, said components comprising: first constituents, comprising: cement of Blaine fineness of about 280 to about 360 m 2 /kg; sand, wherein said sand is provided at a mass ratio of about 0.75 to about 1.25 of said cement; silica fume, wherein said silica fume is provided at a mass ratio of about 0.15 to about 0.4 of said cement; silica flour, wherein said silica flour is provided at a mass ratio of about 0.15 to about 0.3 of said cement; microinclusions, wherein said microinclusions are provided at a mass ratio of up to about 0.35 of said cement, and wherein said first constituents are mixed to yield a first homogeneous mix; second constituents comprising: at least one high-range water-reducing admixture; and water, wherein said water is provided at a mass ratio of about 0.2 to about 0.35 of said cement, and wherein said high-range water-reducing admixture and said water are blended into a second homogenous mix prior to mixing said second homogenous mix with said first homogeneous mix to form a uniform cement-containing paste; and macrofibers, wherein said macrofibers are provided at a mass ratio of up to about 0.35 of said cement, and wherein said macrofibers are blended into said uniform cement-containing paste such that said macrofibers are distributed approximately uniformly in a resultant cement-containing paste, and wherein said resultant cement-containing paste is hydrated.