Fiber Reinforced Polymer ( FRP )

An important feature of fibre reinforced polymer composites (FRP) is their extremely high corrosion resistance. This makes them suitable for use in structures subjected to severe environmental exposure. Applications for FRP bars as internal reinforcement in concrete structural members include parking garages, multi-storey buildings and industrial structures. In many of these applications provision of appropriate fire resistance is one of the major design requirements.
Similar to other materials, the properties of Fiber Reinforced Polymer composite materials deteriorate when exposed to fire. One of the major concerns with FRP reinforcing bars is the loss of strength and stiffness at elevated temperatures. There is very little information in literature on the variation of strength and stiffness of FRP with temperature [1,4,5].To develop such information on strength and stiffness degradation with temperatures for FRP at elevated temperatures a joint research program between University of Manchester, U.K., and NRC was initiated. As part of this project, experimental studies on the tensile mechanical properties of steel and FRP bars at elevated temperatures were undertaken. Results from these experimental studies are presented in this paper to illustrate the comparative variations of tensile strength and stiffness of different types of FRP bars with traditional steel rebars. The objective of these tests is to develop material property data on the variation of strength and stiffness of FRP reinforcement bars at elevated temperatures that can be used in computer models for evaluating fire resistance of concrete structural members reinforced with FRP rebars.

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FRP Procedure

1. Cleaning
Clean all of substrate surface will be FRP lined with scrapper, and then the surface is cleaned with sand paper and thinner

2. Capstans Protection
Cover all capstans with plastic to keep it from FRP affection during the process.

3. Layer Process I
Mix resin and powder, then apply it to all substrate surface using hand brush, wait 15 minutes until dry.

4. Layer Process II
After dry, brush all surface then make MET and mixing resin + powder on it until covering all of MET surface. And then wait 15 minutes to drying process.

5. Layer Process III
Apply all surface with sand paper, and mixing resin + catalyst + pigment + powder with hand brush with 3 mm thickness, then wait 30 minutes for FRP drying process. For using and to get a good result, it may need 1 day to be dry completely.

6. Finishing
After all of process are finish, then the area to be FRP lined cleaned with water. All surface to be Inspected to found any Pin Hole Test with Spark Test Machine and Hardness Test.