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Applications : Roads, Runways, and Tunnels PVA fibers have been used in roads around Japan for over a decade. Anywhere there is concrete and harsh conditions, you should consider the long-lived, rust-proof option that PVA fiber structural reinforcement provides. Here are just a few examples: Japan Highway. In a new standard applying to all areas of Japan the national highway agency, Japan Highway, has selected the RF4000/40mm at 6.5 lbs/yd3 dosage for tunnel linings, to prevent steel reinforcement from rusting and spalling. Kanetsu road Ishiuchi tunnel Client: Japan Highway Construction date: November,1995 Quantity: 100m Fiber: RF4000/30mm, 0.75vol%=10kg/m3; 5.9 lbs/yd3 Country route repair construction of Tsugawa city, Niigata Prefecture Client: Niigata Prefecture Construction Administration Construction date: October, 1998 Quantity: 930m Airport runways are another application for PVA fibers. Steel fibers have demonstrated their superiority to rebar construction in conventional and seamless airport runway construction. However ongoing concerns for safety have been raised in these installations. With normal wear and tear, steel fibers may become dislodged and sucked into the turbines of jets landing or departing. The damage that would occur from such an incident could endanger public safety, therefore PVA fibers may provide a safer alternative. Another application is for precast airstrip panels. It is often easier to manufacture strips offsite rather than disrupt air travel. There is also concern about abrasion of rubber tires against steel fibers, and the possibility of the induction of steel fibers into airplane jet engines. Here the light weight and rustproof characteristics of PVA fibers may prove preferable over steel fibers. Project name: Fukuoka Airport runway Client: Fukuoka Municipal Airport, Japan Construction date: December, 2002 Quantity : 425m3 Fiber: RF4000x30mm/0.75vol%=10kg/m3; 5.9lbs/yd3 |
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