Bond Behaviour Of Fusion Bonded Epoxy Coated Reinforcement
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Bond Behaviour Of Fusion Bonded Epoxy Coated Reinforcement
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Author : Ramli Bin Abdullah
language : en
Publisher:
Release Date : 1992
Bond Behaviour Of Fusion Bonded Epoxy Coated Reinforcement written by Ramli Bin Abdullah and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
Effect Of Thermal Variations On Bond Strength Of Fusion Bonded Epoxy Coated Bars
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Author : WM. Elleithy
language : en
Publisher:
Release Date : 1998
Effect Of Thermal Variations On Bond Strength Of Fusion Bonded Epoxy Coated Bars written by WM. Elleithy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Adhesion categories.
Fusion-bonded epoxy coating is extensively used to enhance the corrosion resistance of reinforcing steel. The bond strength between these bars and the concrete is expected to be less than that of the uncoated bars and it may be further impaired due to prolonged exposure to thermal variations. This investigation was conducted to evaluate the effect of thermal variations, simulating the changes in the night to day temperature, on the bond strength of fusion-bonded epoxy-coated steel reinforcement. The pull-out specimens, prepared using bars of two different sizes and two coating thickness, were exposed to thermal cycling. The critical and ultimate bond strength of the fusion-bonded epoxy-coated bars were compared with that of the uncoated bars. The results indicated a reduction in the critical bond strength between concrete and the fusion-bonded coated bars. Furthermore, the difference between the critical bond strength in the coated and uncoated bars decreased with increasing thermal cycles, indicating that thermal variation has a greater effect on bond strength than the coating thickness.
Bond Of Reinforcement In Concrete
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Author : fib Fédération internationale du béton
language : en
Publisher: fib Fédération internationale du béton
Release Date : 2000-01-01
Bond Of Reinforcement In Concrete written by fib Fédération internationale du béton and has been published by fib Fédération internationale du béton this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000-01-01 with Technology & Engineering categories.
"In 1993, the CEB Commission 2 Material and Behavior Modelling established the Task Group 2.5 Bond Models. It's terms of reference were ... to write a state-of-art report concerning bond of reinforcement in concrete and later recommend how the knowledge could be applied in practice (Model Code like text proposal)... {This work} covers the first part ... the state-of-art report."--Pref.
Bond Between Epoxy Coated Reinforcing Bars And Concrete Under Impact Loading
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Author :
language : en
Publisher:
Release Date : 1994
Bond Between Epoxy Coated Reinforcing Bars And Concrete Under Impact Loading written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
The bond between epoxy-coated reinforcing bars and concrete under static, high strain rate, and impact loading was studied for plain concrete, polypropylene fibre reinforced concrete, and steel fibre reinforced concrete. The bond stress, slip, crack development, the bond stress-slip relationship, and the fracture energy during the bond-slip process were investigated experimentally. The results were compared with those for uncoated reinforcing bars. It was found that for epoxy-coated erbars, the bond resistance decreased, in terms of the maximum local bond stress and the average bond stress; wider cracks developed during the bond process; and the fracture energy during bond failure decreased. It was also found that the influence of epoxy coating on the bond behaviour for push-in loading was much more significant than for pull-out loading. However, steel fibre additions at asufficient content, and higher concrete strength, can mitigate the above effects to a considerable degree. Polypropylene fibres were much less effective in this regard than steel fibres.
Bond Strength Of Prefabricated Epoxy Coated Reinforcement
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Author : Liliana De Anda
language : en
Publisher:
Release Date : 2004
Bond Strength Of Prefabricated Epoxy Coated Reinforcement written by Liliana De Anda and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Epoxy coatings categories.
Prefabricated epoxy-coated reinforcement is used increasingly in reinforced concrete construction in which high corrosion resistance is required. It is well established that epoxy coating reduces bond strength between reinforcement and concrete, and some tests have found that bond strength decreases as coating thickness increases. For prefabricated epoxy-coated reinforcement, it can be difficult to maintain coating thicknesses within required tolerances 175 to 300 im. Beam-end tests were carried out on uncoated bars, bars with green epoxy coating (203 im coating thickness), and prefabricated (gray) epoxy coating (203 to 508 im coating thickness). Tests showed that epoxy coating reduces bond strength, with similar reductions for green and gray coatings. In some cases, bond strength decreased with increasing coating thickness, but for the range of thicknesses investigated the reduction factor of current building codes was found to be conservative
Fusion Bonded Epoxy Coated Reinforcement
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Author :
language : en
Publisher:
Release Date : 1989
Fusion Bonded Epoxy Coated Reinforcement written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.
Bond Behavior Of Uncoated And Epoxy Coated Reinforcement In Concrete
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Author : Timothy Matthew Grundhoffer
language : en
Publisher:
Release Date : 1992
Bond Behavior Of Uncoated And Epoxy Coated Reinforcement In Concrete written by Timothy Matthew Grundhoffer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Epoxy coatings categories.
Parameters Governing The Corrosion Protection Efficiency Of Fusion Bonded Epoxy Coatings On Reinforcing Steel
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Author :
language : en
Publisher:
Release Date : 2008
Parameters Governing The Corrosion Protection Efficiency Of Fusion Bonded Epoxy Coatings On Reinforcing Steel written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Cathodic protection categories.
The purpose of this study was to investigate various epoxy coating and exposure parameters to determine their effects on the corrosion of reinforcing steel. The parameters investigated were: chloride content at the bar depth, coated bar corroded area, corrosion product color under the coating, epoxy coating adhesion, coating color, coating damage (holidays and holes), coating thickness, TGA, DSC and EDS analysis and SEM coating cracking investigation. This study demonstrated that the ECR coating samples extracted from concrete exhibited extensive cracking compared to the new ECR samples in which the coating cracking was limited to only one sample. The coating cracking correlated with the amount of chloride at bar level, residual adhesion of the epoxy to the steel surface, and the percent moisture in the coating. The coating cracking is also related to the change in color of the epoxy and indicates that the epoxy coating degradation in concrete influences the surface condition of the coating. The DSC results showed that both the extracted epoxy coating samples as well as new samples are not fully cured during the manufacturing process. Additionally, the extracted epoxy coated samples investigated presented significant permanent adhesion loss with little or no epoxy coating residue present on the bar surface, while the EDS analysis showed that once adhesion is lost, corrosion will proceed unimpeded under the coating even in the absence of chlorides. The parameters that presented a direct correlation with the observed corrosion activity were the number of holidays and the number of damaged areas per unit length of bar. The results also show a distinct loss of quality control in the handling and possibly storage of new coated bars. The new ECR samples had significantly higher damage density than the samples extracted from concrete, while there was no change in the number of holidays and cure condition.
The Structural Engineer
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Author :
language : en
Publisher:
Release Date : 1996
The Structural Engineer written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Concrete construction categories.
Standard Recommended Practice
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Author : NACE International
language : en
Publisher:
Release Date : 1999
Standard Recommended Practice written by NACE International and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Corrosion and anti-corrosives categories.