The effect of silica fume and steel fiber on the dynamic mechanical performance of high-strength concrete

The impact and fatigue performance of high-strength concrete (HSC), silica fume high-strength concrete (SIFUHSC), steel fiber high-strength concrete (SFRHSC), and steel fiber silica fume high-strength concrete (SSFHSC) under the action of repeated dynamic loading were studied. The mechanisms by whic...

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Bibliographic Details
Published inCement and concrete research Vol. 29; no. 3; pp. 423 - 426
Main Authors Yan, Handong, Sun, Wei, Chen, Huisu
Format Journal Article
LanguageEnglish
Published New York, NY Elsevier Ltd 01.03.1999
Elsevier Science
Subjects
Admixtures for concrete, mortar and grouts
Applied sciences
Buildings. Public works
Concretes. Mortars. Grouts
Exact sciences and technology
Fatigue
Fiber reinforcement
High-performance concrete
Interfacial transition zone
Materials
Properties and performance tests of mortar and hardened concrete
Reinforced concrete
Silica fume
Fatigue
High-performance concrete
Fiber reinforcement
Silica fume
Interfacial transition zone
Performance evaluation
Bending strength
Formulation
Cracking
Mechanical properties
Steel fiber
Experimental study
High strength concrete
Interfacial area
Reinforced concrete
Dynamic load
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Summary:The impact and fatigue performance of high-strength concrete (HSC), silica fume high-strength concrete (SIFUHSC), steel fiber high-strength concrete (SFRHSC), and steel fiber silica fume high-strength concrete (SSFHSC) under the action of repeated dynamic loading were studied. The mechanisms by which silica fume and steel fiber reduce damage were also investigated. The results indicate that steel fiber effectively restrained the initiation and propagation of cracks during the failure of an HSC structure, mitigated the stress concentrations at the tips of cracks, and delayed the damage process under impact and fatigue. Silica fume effectively improved the structure of the interface, eliminated the weakness of the interfacial zone, reduced the number and size of cracks, and enhanced the ability of steel fibers to resist cracking and restrain damage. As a result, the corporation of steel fibers and silica fume can increase greatly the performance of HSC subjected to impact and fatigue.
ISSN:0008-8846
1873-3948
DOI:10.1016/S0008-8846(98)00235-X