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http://dx.doi.org/10.11112/jksmi.2014.18.1.075

Evaluation of Mechanical Properties and Crack Resistant Performance in Concrete with Steel Fiber Reinforcement and CSA Expansive Admixture  

Choi, Se-Jin ((재)포항산업과학연구원, 강구조연구소)
Park, Ki-Tae (한국건설기술연구원)
Kwon, Seung-Jun (한남대학교 건설시스템공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.18, no.1, 2014 , pp. 75-83 More about this Journal
Abstract
In order to prevent brittle failure of concrete, steel fiber reinforcement is effective composite material. However ductility of steel fiber reinforced concrete may be limited due to shrinkage caused by large content of cement binder. Chemical prestressing for steel fiber reinforcement in cement matrix can be induced through expansive admixture and this can increase reinforcing effect of steel fiber. In this study, mechanical performances in concrete with CSA (Calcium sulfoaluminate) expansive admixture and steel fiber reinforcement are evaluated. For this work, steel fiber reinforcement of 1 and 2% of volume ratio and CSA expansive admixture of 10% weight ratio of cement are added in concrete. Mechanical and fracture properties are evaluated in concrete with steel fiber reinforcement and CSA expansive admixture. CSA concrete with steel fiber reinforcement shows increase in tensile strength, initial cracking load, and ductility performance like enlarged fracture energy after cracking. With appropriate using expansive admixture and optimum ratio of steel fiber reinforcement, their interactive action can effectively improve brittle behavior in concrete.
Keywords
Steel fiber reinforcement; CSA expansive admixture; Initial cracking load; ductility; Fracture energy;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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