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http://dx.doi.org/10.11112/jksmi.2014.18.3.125

Evaluation of Crack Resistant Performance in Cement Mortar with Steel Fiber and CSA Expansion Admixture  

Ahn, Jung-Kil (한국철도공사)
Park, Ki-Tae (한국건설기술연구원)
Kwon, Seung-Jun (한남대학교 건설시스템공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.18, no.3, 2014 , pp. 125-132 More about this Journal
Abstract
Steel fiber is a effective composite for crack resistance and improve structural performance under tensile loading. This study presents an evaluation of crack resistance and structural performance in cement mortar with steel fiber and expansion agent through internal chemical prestressing. For this work, cement mortar samples with 10% replacement of cement binder with CSA (Calcium-Sulfo-Aluminate) expansion agent and 1% volume ratio of steel fiber are prepared. Including basic mechanical properties, initial cracking load and fracture energy are evaluated in cement mortar beam with notch. Initial cracking load and fracture energy in cement mortar with CSA and steel fiber increase by 1.75 and 1.41~1.53 times compared with those in cement mortar with steel fiber. With optimum mix design for steel fiber and CSA expansive agent, the composite with chemical prestressing can be applied to various members and effectively improve crack resistance to external loading.
Keywords
Steel fiber; CSA expansion agent; Crack resistance; Initial cracking load; Fracture energy;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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