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Tensile Testing of Fiber Reinforced Plastic FRP Re-bars

Overview. DefinitionAdvantagesDisadvantagesApplicationsTensile Strength Testing. Definition. fiber reinforced plastic rebar designed to reinforce concrete due to concrete's low tensile strength. Advantages Disadvantages. Corrosive resistantTensile strength > steel? weight of st

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Tensile Testing of Fiber Reinforced Plastic FRP Re-bars

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    1. Tensile Testing of Fiber Reinforced Plastic (FRP) Re-bars By: Carrie Richey And Michael Zolezzi

    2. Overview Definition Advantages Disadvantages Applications Tensile Strength Testing

    3. Definition fiber reinforced plastic rebar designed to reinforce concrete due to concrete’s low tensile strength

    4. Advantages Disadvantages Corrosive resistant Tensile strength > steel ¼ weight of steel Electric and thermally non-conductive Impervious to chloride and chemical attack Brittle More expensive than steel No industry standard Low Modulus of Elasticity Lack of familiarity within field

    5. Applications Areas conducive to corrosion: Architectural Concrete Columns, pre-cast elements, cladding Concrete exposed to de-icing salts Bridge decks, parking garage Concrete exposed to marine salts Sea walls, piers, beachfront buildings

    6. Testing of FRB Specimens OBJECTIVE: To determine the tensile strength of FRB specimens and how comparatively relates to steel.

    7. Experimental Program SETUP: Cut four pieces of equal length Affix strain gauges Prepare ends of rebar

    8. Testing Procedure Place specimen in the SATEC machine and lock clamps Attach wires from strain gauges to stain gauge boxes Start computer program on both computer systems Let run until specimen breaks

    9. Observations Slippage Diameters of specimen too small Failure of epoxy Failure of specimen Data fluctuations

    10. Results and Measurements

    11. Stress vs. Strain FRP Rebar 1

    12. Stress vs. Strain FRP Rebar 2

    13. Stress vs. Strain FRP Rebar 3

    14. Conclusion modulus of elasticity of the #4 FRP rebar was 4.06 * 10^6 psi #3 rebar too small to be securely clamped into the SATEC machine two-part epoxy did not hold the pipe to the FPR rebar which caused slipping

    15. Sources of Error Improvements Slipping Epoxy was not mixed in the right proportions Pipe used was too small Specimen not completely vertical Use more ductile polymer Different method of applying casing Different casing “wrap around” method More specimen

    16. THE END thanks

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