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http://dx.doi.org/10.7855/IJHE.2013.15.1.011

Evaluation of Mechanical Properties and Fiber Dispersing Characteristics of Fiber Reinforced Lean Concrete Using Fly Ash and Reject Ash  

Jang, Young Jae (강원대학교 토목건설공학과)
Park, Cheol Woo (강원대학교 토목공학과)
Park, Young Hwan (한국건설기술연구원 인프라구조연구실)
Yoo, Pyeong Jun (한국건설기술연구원 도로연구실)
Jung, Woo Tae (한국건설기술연구원 인프라구조연구실)
Kim, Yong Jae (한양대학교 건설환경공학부)
Publication Information
International Journal of Highway Engineering / v.15, no.1, 2013 , pp. 11-21 More about this Journal
Abstract
PURPOSES: As pavement generally provides service shorter than an expected life cycle, maintenance cost increases gradually. In order to help extending the service life and reduce maintenance cost, a new multi-functional composite pavement system is being developed in Korea. METHODS: This study is a part to develop the multi-functional composite pavement and is to investigate the mechanical performances of fiber-reinforced lean concrete for pavement subbase. The inherent problem of fiber reinforced concrete is dispersion of fibers in concrete mix. This study additionally evaluated fiber dispersion characteristics with respect to different fiber types. RESULTS: From the test results, the compressive strengths of the concretes satisfied the required limit of 5MPa at 7days. The standard deviation of the measured number of fibers were lower in the order of nylon, steel fiber and polypropylene. CONCLUSIONS: Reject ash was shown to be satisfactory as a replacement material to Portland cement in lean concrete base. The fiber volume fraction is suggested to be 0.4% even though the fracture toughness did not vary significantly with respect to fiber types. However, fracture energy absorbed up to complete failure increased with the increased fiber volume fraction increment.
Keywords
fiber reinforced lean concrete; fly ash; reject ash; dispersibility;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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