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http://dx.doi.org/10.7843/kgs.2007.23.8.159

Unconfined Compressive Strength of Fiber-reinforced Cemented Sands by Fiber Reinforcement Form  

Park, Sung-Sik (Division of Civil, Environmental & Urban Engrg., Wonkwang Univ.)
Kim, Young-Su (Dept. of Civil Eng. Kyungpook National Univ.)
Lee, Jong-Cheon (Division of Civil, Environmental & Urban Engrg., Wonkwang Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.23, no.8, 2007 , pp. 159-169 More about this Journal
Abstract
The behavior of fiber-reinforced cemented sands (FRCS) was studied to improve a brittle failure mode observed in cemented sands. Nak-dong River sand was mixed with ordinary Portland cement and a Polyvinyl alcohol (PVA) fiber. A PVA fiber is widely used in concrete and cement reinforcement. It has a good adhesive property to cement and a specific gravity of 1.3. A PVA fiber has a diameter of 0.1 mm that is thicker than general PVA fiber for reinforced cement. Clean Nak-dong River sand, cement and fiber at optimum water content were compacted in 5 layers giving 55 blows per layer. They were cured for 7 days. Cemented sands with a cement/sand ratio of 4% were fiber-reinforced at different locations and tested for unconfined compression tests. The effect of fiber reinforcement form and distribution on strength was investigated. A specimen with evenly distributed fiber showed two times more strength than not-evenly reinforced specimen. The strength of fiber-reinforced cemented sands increases as fiber reinforcement ratio increases. A fully reinforced specimen was 1.5 times stronger than a specimen reinforced at only middle part. FRCS behavior was controlled not only by a dosage of fiber but also by fiber distribution methods or fiber types.
Keywords
Cemented sand; Distribution; Fiber-reinforced; Unconfined compression test;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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