Susilorini, Retno (2007) THE PERFORMANCE IMPROVEMENT of FIBER PULL-OUT of NYLON 600 by CLUMPED EMBEDDED FIBER END. In: The 1 st International Conference of European Asian Civil Engineering Forum. EACEF.
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Abstract
The fiber pull-out is an effort to characterize the fiber-cementitious matrix interface that becomes a basis for fiber reinforced cementitious composites design. Obviously, the fiber performance is influenced by embedded fiber end condition, especially for synthetic fiber such as nylon. The surface of nylon is very smooth and slippery that causes the low bond stress between fiber-cementitious matrix interface. Therefore, a strong effort to improve better fiber performance is very important to be done by implementing special treatment for embedded fiber end condition. The research purposes to show the performance improvement of nylon fiber by fiber pull-out experimental test and modeling. Fiber pull-out experimental test used fiber pullout specimens with fiber of nylon 600 made in Indonesia, 1.1 mm in diameter, and fiber embedded length l f of 100 mm, and also vary with clumped and straight embedded fiber end condition. The clumped embedded fiber end condition was made by burning the end of fiber until the fiber’s end change into clumped form. The modeling of fiber pull-out with clumped embedded fiber end is an improvement of Susilorini’s previous model of straight embedded fiber end that is conducted analytically. The experimental and theoretical model has shown that all type of specimens were broken. Better performance shown by clumped embedded fiber end specimens that were reaching loads of 14-35% higher than straight embedded fiber end specimens, about 1200-1400 N. The research met conclusions of several theories that: (a) The clumped embedded fiber end condition generates higher shear-friction stress τ to against the fiber tension load will improve the specimen’s pull-out load; (b) During the crack Δx formation to left side direction, the shear- friction τ along the embedded fiber gives contribution to against the displacement of fiber free- end; (c) The higher bond capacity m σ is, the higher shear-friction stress τ will be; (d) The length of stable crack is determined by the position of crack arrester; (e) A new equation derived for load P n for a model for fiber pull-out of nylon 600 with clumped embedded fiber end; and (f) The clumped embedded fiber end improves the pull-out load of nylon 600 fiber pull-out specimens.
| Item Type: | Book Section |
|---|---|
| Subjects: | 600 Technology (Applied sciences) > 620 Engineering > 624 Civil engineering > Civil Engineering > Concrete |
| Divisions: | Faculty of Engineering > Department of Civil Engineering |
| Depositing User: | Mrs Rikarda Ratih |
| Date Deposited: | 30 Aug 2018 04:03 |
| Last Modified: | 30 Aug 2018 04:03 |
| URI: | http://repository.unika.ac.id/id/eprint/16851 |
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