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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: High-Performance Fiber-Reinforced Concrete Mixture Proportions with High Fiber Volume Fractions
Author(s): P. Balaguru and H. Najm
Publication: Materials Journal
Appears on pages(s): 281-286
Keywords: compressive strength; fiber-reinforced concrete; flexural strength; high-performance concrete; lightweight concrete; silica fume; toughness
Abstract:An experimental investigation of high-performance fiber-reinforced concrete (FRC) was performed that showed high-performance FRC with fiber volume fractions up to 3.75% of 30 mm-long hooked steel fibers can be achieved using conventional mixing and appropriate matrix compositions. Based on this investigation, the optimum fiber content was dependent on mixture design constituents, fiber types, and mixing procedure. Test results showed high-performance steel FRC (SFRC) with 3.75% fiber volume fraction is attainable and can be successfully applied in the field. The fibers were mixable with the mortar and concrete matrixes. The mixture was workable and flowable and fiber distribution was uniform. Six mortar mixture proportions and one lightweight concrete mixture and three fiber types were tested. Mortar mixtures included cement Types II and V, mortar sand, condensed silica fume, and high-range water-reducing admixtures (HRWRA). The fiber types were hooked steel fibers, straight steel fibers, and polypropylene macrofibers. The mixtures were successfully produced in a ready-mix plant. Flexural strengths obtained varied from 12 to 24 MPa. Compressive strengths varied from 74 to 100 MPa and splitting tensile strengths were from 12.6 to 17 MPa. The flexural toughness of mixtures achieved in this study was two to three times higher than those of conventional FRC.
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