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Shvoong Home>Science>Architecture>THRESHOLDS OF CONSTRUCTION ANOMALIES IN FRP REPAIR SYSTEMS Summary

THRESHOLDS OF CONSTRUCTION ANOMALIES IN FRP REPAIR SYSTEMS

Article Summary   by:toffi_75     Original Authors: Baris Yalim; Ahmet Serhat Kalayci; Ahmet Serhat Kalayci
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Fiber reinforced polymer (FRP) composites have been used extensively in repair applications over the last two decades. In addition to their high-strength and lightweight properties, important characteristics of FRP systems for structural repair and strengthening applications include their resistance to electro-chemical corrosion, and speed and ease of installation. Therefore, FRP systems can be efficient and economical options to traditional repair methods. However, relationship between the long-term performance of FRP repair systems and their construction processes are not easy to quantify. Moreover, tolerances for most construction anomalies such as surface irregularities and crack widths are not yet based on adequate scientific data. For instance, depending on their state (i.e. shear or flexural) and size, cracks in the concrete may either be left untreated or epoxy injected. The thresholds separating these approaches may depend on technical and economical considerations. This paper presents the current study to evaluate the effect of surface flaws on the performance of wet lay-up FRP systems. Four types of flaws are considered; surface roughness, surface flatness, voids and bug holes, and cracks/discontinuities. Discussions of test results and recommendations are also provided.
Published: August 29, 2007   
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