High Tensile Strength, High Modulus, High Bond Strength
Like steel, carbon, aramid and fiberglass, PVA fibers have a modulus of elasticity (resistance to stretching) greater than concrete, making them truly structural fibers. Unlike other structural fibers, PVA is hydrophilic, causing it to form a molecular bond with the matrix during hydration and curing. This unique combination of bond strength, tensile strength and high modulus of elasticity gives PVA-reinforced concrete substantial tensile and flexural strength. In an engineered matrix designed by University of Michigan researchers, KURALON™ PVA fibers are able to absorb as much as 500 times more energy than typical fiber-reinforced concrete in tension and bending.
"PVA-ECC provides up to 500 times the tensile strain capacity of fiber-reinforced concrete. The combination of high tensile strength of PVA fibers and controlled interface bond with mortar makes it a true structural fiber."
Dr. Victor Li, University of Michigan, Ann Arbor
Proof of our structural performance is evidenced by Lafarge's choice of PVA fibers for "Ductal"®, their revolutionary ultra-high performance (UHPC) material that offers a unique combination of strength, ductility, durability and aesthetic flexibility. (See sidebar.)
Where normal concrete might have 3,000 psi to 7,000 psi compressive strength, Ductal® offers 20,000 psi to 30,000 psi. Due to these impressive characteristics, Ductal® solutions can be designed with smaller elements, without the use of passive reinforcement and, in many applications, without prestressed or post-tensioned reinforcement. Ductal® is used to build bridges and other structures with discontinuous fibers as its primary reinforcement (generally, steel fibers are selected for their high ultimate strength). But, where there is a chance of people touching the surface or a concern that rust might impair the aesthetics, Lafarge employs PVA as their structural fiber of choice.
To learn more about Ductal®, please visit their web site: imagineductal.com. To learn more about PVA fibers, or to request a free sample, please contact us at pvafiber@kuraray-am.com or call 212 986-2230, extension 120.
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Ductal®: A Revolutionary, Ultra-High Performance Material uses fibers for its primary reinforcement and is up to ten times stronger than normal concrete! imagineductal.com |
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