Blast-resistant concrete also suitable for limiting penetration of ballistic fragments

A method of producing concrete having a combination of strength and toughness suitable to resist levels of blast and to resist penetration by ballistic fragments, comprising:

• mixing first constituents comprising:
• cement of Blaine fineness of about 280 to about 360 m2/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 mixing results in a first homogeneous mix;
• mixing 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 mixing of said second constituents results in a second homogenous mix;
• mixing said first homogeneous mix with said second homogeneous mix to form a uniform cement-containing paste;
• blending macrofibers into said uniform cement-containing paste such that said macrofibers are distributed approximately uniformly in a resultant cement-containing paste;
• and
• hydrating said resultant cement-containing paste.

Concrete having a combination of strength and toughness to resist blast and penetration by ballistic fragments, comprising:

• first constituents, comprising:
• cement of Blaine fineness of about 280 to about 360 m2/kg;
• sand,
• wherein said sand is mixed with said cement at a mass ratio of about 0.75 to about 1.25 of said cement;
• silica fume,
• wherein said silica fume is mixed with said cement at a mass ratio of about 0.15 to about 0.4 of said cement;
• silica flour,
• wherein said silica flour is mixed with said cement at a mass ratio of about 0.15 to about 0.3 of said cement;
• microinclusions,
• wherein said microinclusions are mixed with said cement 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 to a second homogeneous mix prior to mixing with said first homogenous 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 at least hydrated to yield said concrete.

A concrete having a combination of strength and toughness to resist levels of blast and to resist penetration by ballistic fragments, comprising:

• first constituents, comprising:
• cement of Blaine fineness of about 280 to about 360 m2/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 the mass of said cement;
• microinclusions,
• wherein said microinclusions are provided at a mass ratio 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 homogeneous mix prior to mixing with said first homogeneous mix to form a uniform cement-containing paste;
• and
• macrofibers,
• wherein said macrofibers are provided at a mass ratio 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.