Structures and components comprising blast-resistant concrete also suitable for limiting penetration of ballistic fragments

US8016938B2 · kind B2 · utility

Assignee

• The United States of America as represented by the Secretary of the Army · US

Inventors

• Bartley P. Durst · Vicksburg, US
• Billy D. Neeley · Vicksburg, US
• Edward F. O'Neil · South Burlington, US
• Toney K. Cummins · Vicksburg, US

Key dates

• Filing date: May 7, 2010
• Grant date: Sep 13, 2011
• Expiry date: May 7, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24479
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Concrete structures and components with improved strength and toughness. A uniform mix of first constituents comprises: cement of Blaine fineness of 280-360 m2/kg; sand at a mass ratio of 0.75-1.25 of the cement; silica fume at a mass ratio of 0.15-0.4 of the cement; silica flour at a mass ratio of 0.15-0.3 of the cement; and microinclusions at a mass ratio up to 0.35 of the cement. This is then mixed with a blend of second constituents comprising a specified amount of an HRWRA and an amount of water at a mass ratio of 0.2-0.35 of the cement. This is mixed sufficiently to form a uniform cement-based paste to which an amount of macrofibers at a mass ratio of up to 0.35 of the cement is added to yield a uniform product. Nanoinclusions may be added to improve crack resistance and increase density.