Author: John Harder Publisher: ISBN: Category : Post-tensioned prestressed concrete construction Languages : en Pages : 46
Book Description
There is more than one billion square feet of concrete structures which utilize unbonded post-tensioned reinforcement in North America. In general, these buildings perform well provided that moisture access to the unbonded post-tensioned reinforcement is avoided. However, buildings constructed in this manner do require special evaluation techniques to avoid misdiagnosis that can lead to inappropriate, expensive, or unnecessary repairs. Alternatively, serious safety issues may be left undiscovered if the evaluation program fails to recognize the unique issues related to unbonded post-tensioning systems. The purpose of this document is to provide an understanding of the unique technical requirements for investigation and maintenance of buildings with unbonded tendons. It is intended that this document be a guide for owners, property managers, and others with an interest in real estate, to develop consistent standards and expectations for the assessment and maintenance of unbonded post-tensioned structures.
Author: fib Fédération internationale du béton Publisher: fib Fédération internationale du béton ISBN: 9782883940734 Category : Technology & Engineering Languages : en Pages : 84
Book Description
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.
Author: Michael Grantham Publisher: CRC Press ISBN: 1138027081 Category : Technology & Engineering Languages : en Pages : 838
Book Description
The Concrete Solutions series of International Conferences on Concrete Repair began in 2003 with a conference held in St. Malo, France in association with INSA Rennes. Subsequent conferences have seen us partnering with the University of Padua in 2009 and with TU Dresden in 2011. This conference is being held for the first time in the UK, in association with Queen’s University Belfast and brings together delegates from 36 countries to discuss the latest advances and technologies in concrete repair. Earlier conferences were dominated by electrochemical repair, but there has been an interesting shift to more unusual methods, such as bacterial repair of concrete plus an increased focus on service life design aspects and modelling, with debate and discussion on the best techniques and the validity of existing methods. Repair of heritage structures is also growing in importance and a number of the papers have focused on the importance of getting this right, so that we may preserve our rich cultural heritage of historic structures. This book is an essential reference work for those working in the concrete repair field, from Engineers to Architects and from Students to Clients.
Author: Denys Breysse Publisher: Springer Science & Business Media ISBN: 9400727364 Category : Technology & Engineering Languages : en Pages : 389
Book Description
This book gives information on non destructive techniques for assessment of concrete structures. It synthesizes the best of international knowledge about what techniques can be used for assessing material properties (strength) and structural properties (geometry, defects...). It describes how the techniques can be used so as to answer a series of usual questions, highlighting their capabilities and limits, and providing advices for a better use of techniques. It also focuses on possible combinations of techniques so as to improve the assessment. It is based on many illustrative examples and give in each case references to standards and guidelines.
Author: Antonin Fabbri Publisher: Springer Nature ISBN: 303083297X Category : Technology & Engineering Languages : en Pages : 317
Book Description
This book presents the work done by the RILEM Technical Committee 274-TCE. It focuses on the estimation of the parameters which are necessary to properly design earthen constructions. It provides a compilation of the value classically obtained for the key parameters of earthen materials, a pedagogical presentation of the main testing procedures for earthen materials, their advantage and their drawback and an overview of most standards on earthen materials, whatever their origin and their language.The book is divided into eight chapters. After a general introduction on earthen materials and constructions, the state of the art on the material characterisation technics, the assessment of hygrothermal performance, the mechanical behaviour, seismic resistance and the durability will be presented, each in a dedicated chapter. On the basis of these last chapters, a critical review of the standards which are used for earthen material will be presented in the last chapter. The last chapter is dedicated to the analysis of the environmental potential of earth-based building materials.
Author: John Harder
Author: Canada Mortgage and Housing Corporation
Author: John Harder
Author: fib Fédération internationale du béton
Author: 
Author: United States. National Bureau of Standards
Author: National Institute of Standards and Technology (U.S.)
Author: Michael Grantham
Author: Denys Breysse
Author: Antonin Fabbri