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 percent of the plain concrete. There was absolutely no cracking when a fiber dosage of 2.0 vol% of concrete was used. There was 98 percent and 92 percent reduction of plastic shrinkage cracking when the fiber dosages were 1.0 percent and 0.5 percent, respectively, by volume of concrete.
Concrete Plastic Shrinkage-Reduction Potential of Synergy Fibers
Transportation Research Record: Journal of the Transportation Research Board
Transportation Research Record: Journal of the Transportation Research Board ; 1775 , 1 ; 106-117
2001-01-01
Article (Journal)
Electronic Resource
English
Concrete Plastic Shrinkage-Reduction Potential of Synergy Fibers
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