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Applications : Slabs For years, steel fibers have been accepted around the world for use in commercial slabs, lowering labor costs involved with the placement of traditional steel reinforcement and distributing the reinforcement more evenly. The slightly higher price of PVA fibers tended to limit their use in slabs. But steel fibers have potential problems in these applications. During vibration compaction, the dense steel fibers tend to settle toward the bottom of the slab in higher slump mixes, reducing their effectiveness. This problem can be even worse for the newer self-compacting/consolidating designs. These highly fluid mix designs exacerbate the problem of segregation. PVA fibers address this problem. PVA's density of 1.3 is high enough to discourage floating, but low enough not to sink to the bottom of the slab. In addition, PVA structural fibers don't rust, are 1/6th the weight of steel, won't spark and won't stab people and equipment. For slab on grade, 10 lbs/yd3, (6kg/m3) of RF4000/30mm is our recommended dosage. Recent studies suggest that a hybrid combination of different sized PVA fibers can deliver even better performance at a lower cost. Give us a call if you would like more information on using PVA fibers in your slab installation. |
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