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CONCRETE PLASTIC SHRINKAGE-REDUCTION POTENTIAL OF SYNERGY FIBERS.
| 题名： | CONCRETE PLASTIC SHRINKAGE-REDUCTION POTENTIAL OF SYNERGY FIBERS. |
| 作者： | Ramakrishnan-V |
| 关键词： | Concrete-; Cracking-; Fiber-content; Laboratory-tests; Shrinkage-; Slabs-; Synthetic-fibers |
| 摘要： | The contribution of synergy fibers to plastic shrinkage reduction of concrete was studied using cement-rich concrete, and the experimental results are reported. The fiber dosages were 0.5, 1.0, and 2.0 vol% of concrete. Three different batches of concrete were made, and 15 slabs were tested. The tests were conducted using slabs 51 mm (2.0 in.) thick, 1 m (3 ft) long, and 0.6 m (2 ft) wide. The crack development was enhanced by using fans that can produce a wind velocity of 22 km/h. The performance of these fibers was compared using the crack areas of control slabs with no fibers and fiber-reinforced slabs. The results indicate that synergy fibers, at the specified dosages, tremendously reduced the plastic shrinkage in concrete. The crack-area reduction varied from 100 to 92% of the plain concrete. There was absolutely no cracking when a fiber dosage of 2.0 vol% of concrete was used. There was 98% and 92% reduction of plastic shrinkage cracking when the fiber dosages were 1.0% and 0.5%, respectively, by volume of concrete. |
| 总页数： | Transportation Research Record. 2001. (1775) pp106-117 (2 Phot., 7 Fig., 11 Tab., 4 Ref.) |
| 报告类型： | 科技报告 |
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