Carbon Fiber Rebar in PCC.docx - Carbon Fiber Rebar in PCC...

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Carbon Fiber Rebar in PCC Author Institution
Reinforced concrete is cement in which bars (" rebars ") or fibres have been incorporated to strengthen a material that would otherwise be brittle. Nearly all cement used in construction today is reinforced. The most widely-accepted form of enhancement is welded-wire fabric, a mesh of steel wires that is placed in cement . Synthetic-fibre can also be used and can reduce the labour costs and difficulty in placement of the welded-wire mesh. These reinforcing methods are incorporated into the cement when it is made. But when structures crack, begin to fail, or the initial construction did not account for additional strength needed for unpredictable circumstances, such as wind loads , rebar or other synthetic reinforcing materials cannot be added to existing structures . Carbon-fibre kevlar technology, has been used in a wide range of applications to provide reinforcement to existing structures . Concrete reinforcement with carbon-fibre sheet straps is a time-proven and tested method of reinforcing existing concrete and masonry structures for the purposes of repair or to strengthen the integrity and load tolerance of existing structures . Repair and rehabilitation of our rapidly deteriorating infrastructure is of significant concern in most countries of the world. Critical efforts are needed to develop sustainable materials and placement technologies that can produce long-lasting repairs. This paper will present data to support the argument that fiber reinforced concrete (FRC) placed by various means is an ideal material for achieving these goals. Results from several series of tests measuring permeability under stress, bulk chloride diffusion, control of rebar corrosion and bond developed with old concrete are presented. In all instances, benefits of fiber reinforcement are demonstrated. Renewable fiber production research [ edit ] Currently, a number of research institutions are carrying out research to try to synthesise carbon fiber from renewable, non-fossil fuel based feedstocks.

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