Evaluation Of Corrosion Protection Of Unbonded Tendons
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Evaluation Of Corrosion Protection Of Unbonded Tendons
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Author :
language : en
Publisher:
Release Date : 1978
Evaluation Of Corrosion Protection Of Unbonded Tendons written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Corrosion resistant materials categories.
Corrosion Protection Of Unbonded Tendons
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Author : FIB – International Federation for Structural Concrete
language : en
Publisher: FIB - International Federation for Structural Concrete
Release Date : 1986-01-01
Corrosion Protection Of Unbonded Tendons written by FIB – International Federation for Structural Concrete and has been published by FIB - International Federation for Structural Concrete this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986-01-01 with Technology & Engineering categories.
Unbonded tendons are popular in certain types of structure for reasons of economy and speed of construction. The FIP Commission on Pre-stressing Steels and Systems accordingly appointed an ad hoc committee to investigate available knowledge and experience and to instigate research if necessary.
Heron
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Author : C. F. Etienne
language : en
Publisher:
Release Date : 1981
Heron written by C. F. Etienne and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with categories.
Corrosion Protection Of Prestressing Steels
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Author : FIB – International Federation for Structural Concrete
language : en
Publisher: FIB - International Federation for Structural Concrete
Release Date : 1996-09-01
Corrosion Protection Of Prestressing Steels written by FIB – International Federation for Structural Concrete and has been published by FIB - International Federation for Structural Concrete this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996-09-01 with Technology & Engineering categories.
Flexible Filler Corrosion Protection Of Unbonded Post Tension Tendons
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Author : Carlos F. Castaneda
language : en
Publisher:
Release Date : 2017
Flexible Filler Corrosion Protection Of Unbonded Post Tension Tendons written by Carlos F. Castaneda and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Nanocomposites (Materials) categories.
Flexible fillers has recently been implemented as corrosion protection for post-tensioning tendons used in bridge structures in Florida. There are two different explanations why corrosion could take place: 1. water is able to reach the steel 2. Microbiologically Influenced Corrosion. The aim of this research is to evaluate corrosion protection effectiveness of five different microcrystalline waxes under different environmental conditions. Specimens tested ranged from 7-wire steel strands to single wires (12-16 cm). Another aim is the appraisal of wax degradation by fungi species. Single wires coated with each of the investigated protection materials, were sprayed with suspensions of three different fungi species and a mix of them. For single wires, independent of the environmental condition the specimen with more corrosion was Nontribos, as well as the filler coated wires contaminated with Fungi. Fungi species investigated were able to utilize the waxes as carbon source and caused different extents of MIC.
Durability Of Post Tensioning Tendons
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Author : fib Fédération internationale du béton
language : en
Publisher: fib Fédération internationale du béton
Release Date : 2001-01-01
Durability Of Post Tensioning Tendons 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 2001-01-01 with Technology & Engineering categories.
In some countries durability problems with post-tensioning tendons have in the past led to fairly restrictive regulations. Improvements to execution procedures have been developed since, and new or improved prestressing systems have been proposed, too. This development was, of course, subject of discussions in fib Commission 9 Reinforcing and Prestressing Materials and Sytems and in IABSE Working Commission 3 Concrete Structures. It was decided to organise a workshop with the aim to review the different aspects of the problems encountered and to discuss solutions available today. Keynote speakers from various countries were invited to contribute. Their papers are published in this bulletin, grouped together under the following themes: Inventory and condition (6 papers) Investigation and repair (5 papers) Technical progress (4 papers) Strategies for improvement (6 papers) Supported by the international federation for structural concrete fib, and the international association for bridge and structural engineering IABSE, the workshop took place on 15-16 November 2001 at Ghent University, celebrating the 75th anniversary of the Magnel Laboratory for Concrete Research, whose director also chaired the Scientific Committee and edited the bulletin. It needs to be emphasised that in the bulletin invited experts present their individual views. Although not yet discussed in any of the association's working bodies, the highly topical contents of the bulletin is believed to be of general interest to fib's members and to document a starting point for future work in this field. Therefore, the Council of fib agreed to exceptionally publish these papers within fib's series of Bulletins.
Corrosion Engineering And Cathodic Protection Handbook
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Author : Volkan Cicek
language : en
Publisher: John Wiley & Sons
Release Date : 2017-02-17
Corrosion Engineering And Cathodic Protection Handbook written by Volkan Cicek and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-02-17 with Technology & Engineering categories.
The Corrosion Engineering and Cathodic Protection Handbook combines the author's previous three works, Corrosion Chemistry, Cathodic Protection, and Corrosion Engineering to offer, in one place, the most comprehensive and thorough work available to the engineer or student. The author has also added a tremendous and exhaustive list of questions and answers based on the text, which can be used in university courses or industry courses, something that has never been offered before in this format. The Corrosion Engineering and Cathodic Protection Handbook is a must-have reference book for the engineer in the field, covering the process of corrosion from a scientific and engineering aspect, along with the prevention of corrosion in industrial applications. It is also a valuable textbook, with the addition of the questions and answers section creating a unique book that is nothing short of groundbreaking. Useful in solving day-to-day problems for the engineer, and serving as a valuable learning tool for the student, this is sure to be an instant contemporary classic and belongs in any engineer's library.
Durability Of Post Tensioning Tendons
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Author : fib Fédération internationale du béton
language : en
Publisher: fib Fédération internationale du béton
Release Date : 2006
Durability Of Post Tensioning Tendons 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 2006 with Technology & Engineering categories.
The durability of post-tensioning tendons depends undoubtedly on the durability of the materials used, but there are design concept specifics which are also of major importance: the post-tensioning layout and layers of protection such as concrete cover and selected materials in view of the aggressivity of the environment for instance. It is well known that sustainability principles guide the Engineer from the very beginning, at the project conception, during construction and the service life of a structure. Decisions made during conceptual and design stage have the largest influence on the durability and sustainability of post-tensioning tendons. fibBulletin 33 addresses the specifics for prestressed concrete structures: the durability of post-tensioning tendons. It should be noted that it does not repeat topics that have been addressed in other fib bulletins and which is common for both reinforced concrete and prestressed concrete structures. Pre-tensioning, which is used extensively in the precast industry, is not considered here, although conclusions and recommendations herein may, in many cases, also be applicable. This recommendation was prepared by Working Party 5.4.2, Durability specifics for prestressed concrete structures, in cooperation with fib Commission 9,Reinforcing and prestressing materials and systems. A preliminary version of this recommendation served as the basic document for the second workshop on "Durability of post-tensioning tendons", held on 11-12 October 2004 in Zurich. This workshop was a follow-up to the first workshop held in Ghent in 2001. Bulletin 33 includes revisions corresponding to the agreed results of the Zurich workshop.
Recommended Practice For Evaluation Of Metal Tensioned Systems In Geotechnical Applications
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Author : James Lawrence Withiam
language : en
Publisher: Transportation Research Board
Release Date : 2002
Recommended Practice For Evaluation Of Metal Tensioned Systems In Geotechnical Applications written by James Lawrence Withiam and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Anchorage (Structural engineering) categories.
Prestressed Concrete Slabs With Bonded And Unbonded Tendons
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Author : Jasmin Abdelhalim
language : en
Publisher:
Release Date : 2021
Prestressed Concrete Slabs With Bonded And Unbonded Tendons written by Jasmin Abdelhalim and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with Prestressed concrete categories.
Abstract: Post-tensioning concrete technology increases the resistance of flexural concrete members. This technology allows for the production of slenderer sections, and sequentially less usage of material preserving the sustainability concept in construction engineering. Post-tensioning process can be done using bonded or unbonded steel tendons. The unbonded tendons are thought to have better resistance to corrosion for structures exposed to severe environmental conditions. The unbonded tendon's steel strands are painted with grease and covered with plastic sheathing to prevent the moisture from reaching the steel strands thus they can provide high corrosion resistance. According to the ACI 318-19 and other codes of practice, the stress in the unbonded tendon at the ultimate limit state is limited to less than or equal to the tendon's yield stress. On the other hand, the bonded tendon's stress at this state is determined to be more than or equal to the tendon's yield stress. This limitation for the unbonded tendons restrained the widespread usage of the unbonded system. Through this research, six-simply supported one-way slabs; two with bonded tendons, two with unbonded tendons and two with unbonded tendons and non-prestressing steel reinforcement are tested in flexure to failure. The post-tension slabs are of 4.0-meters in span and the flexural tests are carried in the AUC structural engineering laboratory in a four-point loading scheme. The ultimate stress of the unbonded tendons are measured at the failure stage. The results of both systems are compared against each other and against the provisions of the ACI 318-19. The unbonded post-tension slabs with non-prestressing steel reinforcement showed higher failure loads than the bonded and unbonded slabs without reinforcement. The ACI 318-19 provisions were critically reviewed versus the results of the experimental investigation. The review reveals that the limitation of the unbonded tendon's ultimate stress is not accurate and can be reviewed.