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Bond In Concrete
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Download or read book Bond in Concrete written by Peter Bartos and published by . This book was released on 1982 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :FIB – International Federation for Structural Concrete Publisher :FIB - International Federation for Structural Concrete ISBN 13 :2883941637 Total Pages :326 pages Book Rating :4.8/5 (839 download)
Book Synopsis Advances on bond in concrete by : FIB – International Federation for Structural Concrete
Download or read book Advances on bond in concrete written by FIB – International Federation for Structural Concrete and published by FIB - International Federation for Structural Concrete. This book was released on 2022-12-01 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural behavior of reinforced concrete elements strongly depends on the interaction between the reinforcing bars and the surrounding concrete, which is generally referred as “bond in concrete”. In service conditions, the reinforcement-to-concrete bond governs deformability through the tension stiffening of concrete surrounding the bar as well the crack development and crack width. At Ultimate Limit State, bond governs anchorage and lap splices behavior as well as structural ductility. When plain (smooth) bars were used, the steel-to-concrete bond was mainly associated with “chemical adhesion/friction” that is related to the surface roughness of the rebar. As steel strengths increased the need to enhance interaction between steel and the surrounding concrete was recognized, and square twisted rebars, indented rebars or, later on, ribbed rebars came into the market, the latter being the type of deformed bar most commonly adopted since the 1960/70s. When ribbed rebars became widely used, several research studies started worldwide for better understanding the interaction between ribs and the surrounding concrete. Researchers evidenced the development of micro-cracks (due to the wedge action of the ribs) towards the external face of the structural element. If confinement is provided by the concrete cover, by transverse reinforcement or by an external transverse pressure, the full-anchorage capacity is guaranteed and a pull-out failure occurs, with crushing of concrete between the ribs. On the contrary, with lesser confining action, a splitting failure of bond occurs; the latter may provoke a brittle failure of the lap splice or, in some cases, of anchorages. However, after many years of research studies on bond-related topics, there are still several open issues. In fact, new materials entered into the market, as concrete with recycled aggregates or fibre reinforced concrete; the latter, having a kind of distributed reinforcement into the matrix (the fibres), provides a better confinement to the wedge action of the ribs. In addition, concrete and steel strength continuously increased over the years, causing changes in the bond behavior due to differences in mechanical properties of materials but also to the different concrete composition at the interface with the steel rebar causing a different bond behavior. Moreover, the lower water/cement ratio of these high-strength concrete makes the bleeding phenomena less evident, changing the concrete porosity in the upper layers of the structural element and thus making the current casting position parameters no-longer reliable. Finally, concrete with recycled aggregates are becoming more important in a market that is looking forward to a circular economy. As such, all the experimental results and database that allowed the calibration of bond rules now present in building codes for conventional concrete, may be not be representative of these new types of materials nowadays adopted in practice. Furthermore, after more than 50 years of service life, structural elements may not satisfy the current safety requirements for several reasons, including material degradation (with particular reference to steel corrosion) or increased loads, by also considering the seismic actions that were non considered by building codes at the time of the original design. The structural assessment of existing structures requires proper conceptual models and new approaches for evaluating the reliability of existing structures by also considering the remaining expected service life. In addition, specific rules for older materials, as plain smooth bars, should be revised for a better assessment of old structures. Last, but not least, interventions in existing structures may require new technologies now available such as post-installed rebars. While many advances have been achieved, there remain areas where a better understanding of bond and its mechanisms are required, and where further work is required to incorporate this understanding into safe and economic rules to guide construction and maintenance of existing infrastructures. These aspects were widely discussed within the technical community, particularly in the fib Task Group 2.5 and in the ACI 408 Committee dealing with bond and anchorage issues. Furthermore, special opportunities for discussing bond developments were represented by the International Conferences on ‘Bond in Concrete’ held each decade since 1982 as well as by joint workshops organized by fib TG2.5 and ACI 408. Within this technical collaboration, this Bulletin was conceived, and, thus, it collects selected papers presented at the joint fib-ACI Convention Session on Bond in Concrete held in Detroit (USA) in 2017. The bulletin is based on four main Sections concerning: - General aspects of bond - Anchorages and laps of bars and prestressing tendons - Bond under severe conditions - Degradation of bond for corrosion - Bond in new types of concrete The main aim of the Bulletin is to shed some new lights on the advances in understanding and application of bond related issues achieved over the last few years, and identify the challenges and priorities to be addressed in the next years. Another important aspect of the bulletin is to provide practical information from research findings.
Author :fib Fédération internationale du béton Publisher :fib Fédération internationale du béton ISBN 13 :9782883940505 Total Pages :448 pages Book Rating :4.9/5 (45 download)
Book Synopsis Bond of Reinforcement in Concrete by : fib Fédération internationale du béton
Download or read book Bond of Reinforcement in Concrete written by fib Fédération internationale du béton and published by fib Fédération internationale du béton. This book was released on 2000-01-01 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: "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.
Book Synopsis Studies on Bond Between Concrete and Steel by : Duff Andrew Abrams
Download or read book Studies on Bond Between Concrete and Steel written by Duff Andrew Abrams and published by . This book was released on 1925 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tests of Bond Between Concrete and Steel by : Duff A. (Duff Andrew) Abrams
Download or read book Tests of Bond Between Concrete and Steel written by Duff A. (Duff Andrew) Abrams and published by Hardpress Publishing. This book was released on 2012-01 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.
Book Synopsis Bond Strength of Deformed Bars in Tension by : G. C. Reynolds
Download or read book Bond Strength of Deformed Bars in Tension written by G. C. Reynolds and published by . This book was released on 1982 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tests of Bond Between Concrete and Steel (Classic Reprint) by : Duff Andrew Abrams
Download or read book Tests of Bond Between Concrete and Steel (Classic Reprint) written by Duff Andrew Abrams and published by Forgotten Books. This book was released on 2016-09-02 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Tests of Bond Between Concrete and Steel Present American practice is fairly standardized as to the bond stresses to be used in designing, but a rational basis for the stresses used is lacking and there is a great diversity of practice in the methods of calculating these stresses. There are many phases of bond action which are not now understood. It is evident that the distribution of bond stress in reinforced concrete members under load and the nature and value of bond resistance under given conditions may well be the subject of experimental investigation. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Book Synopsis Bond in concrete 2012 : bond, anchorage, detailing ; proceedings of the 4. Bond in Concrete Conference: Bond, Anchorage, Detailing ; Brescia, Italy, 17 - 20. June 2012. 1. General aspects of bond by : Bond in Concrete Conference
Download or read book Bond in concrete 2012 : bond, anchorage, detailing ; proceedings of the 4. Bond in Concrete Conference: Bond, Anchorage, Detailing ; Brescia, Italy, 17 - 20. June 2012. 1. General aspects of bond written by Bond in Concrete Conference and published by . This book was released on 2012 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Adhesion between polymers and concrete / Adhésion entre polymères et béton by : H. R. Sasse
Download or read book Adhesion between polymers and concrete / Adhésion entre polymères et béton written by H. R. Sasse and published by Springer. This book was released on 2013-11-27 with total page 761 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preface Adhesion is a phenomenon architects and civil engineers are not very familiar with. In other disciplines knowledge about surface properties and the background of bonding energies is also far from satisfactory; nevertheless there are many important· applications in concrete engineering, where adhesion is necessary for success and durability. These include: - coating and painting - repair of concrete surfaces - bonding of fresh to old concrete - crack injection - glueing of precast elements - glueing of steel to concrete, etc. In 1981 RILEM established the technical committee 52-RAC 'Resin Adherence to Concrete'. The main aims of the committee's work were - to collect research results and practical experiences - to initiate and coordinate research programs - to develop, on a scientific base, test methods for field and for laboratory purposes. One of the results of the committee's work is a state-of-the-art report, which will be presented orally as a General Report at the International Symposium ISAP '86, and will be printed either in the RILEM journal Materials and Structures or separately. Several test recommendations have been elaborated and will be prepared as drafts for the participants ofISAP '86. These are: - direct tensile test - pull-off test - direct shear test - slant shear test - four-point bending test - dynamic loading test - thermal compatibility test (two versions) - injectibility test.
Book Synopsis An Evaluation of Equipment and Procedures for Tensile Bond Testing of Concrete Repairs by : Alexander M. Vaysburd
Download or read book An Evaluation of Equipment and Procedures for Tensile Bond Testing of Concrete Repairs written by Alexander M. Vaysburd and published by . This book was released on 1999 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: If the durability of repaired concrete structures is a primary objective of any repair project, then every effort should be made to ensure adequate bonding between the repair and the existing concrete substrate. A total of 257 partial-depth cores in 77 experimental repairs were tested in Florida, Illinois, and Arizona in order to evaluate the effect of material properties and environmental conditions on the bond between repair and concrete substrate. Three pull-off testing devices were used to determine the bond strengths for each of the experimental repairs. In addition, the testing devices themselves were evaluated by analyzing the magnitude and relative precision of the pull-off strengths, modes of failure, and ease of use in an effort to identify a reliable and practical device for determining in situ tensile bond. The optimum depth of core drilling into the existing substrate was determined by comparing theoretical finite element analysis of failure zone stress distribution with measured test results.
Book Synopsis A Measure of the Bond Between Asphalt and Concrete by : Bruce B. Bolton
Download or read book A Measure of the Bond Between Asphalt and Concrete written by Bruce B. Bolton and published by . This book was released on 1928 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bond in concrete 2012 : bond, anchorage, detailing ; proceedings of the 4. Bond in Concrete Conference: Bond, Anchorage, Detailing ; Brescia, Italy, 17 - 20. June 2012. 2. Bond in new materials and under severe conditions by : Bond in Concrete Conference
Download or read book Bond in concrete 2012 : bond, anchorage, detailing ; proceedings of the 4. Bond in Concrete Conference: Bond, Anchorage, Detailing ; Brescia, Italy, 17 - 20. June 2012. 2. Bond in new materials and under severe conditions written by Bond in Concrete Conference and published by . This book was released on 2012 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Studies of Bond Between Concrete and Steel and Related Factors by : Carl A. Menzel
Download or read book Studies of Bond Between Concrete and Steel and Related Factors written by Carl A. Menzel and published by . This book was released on 1952 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :fib - federation internationale du beton Publisher :John Wiley & Sons ISBN 13 :3433030618 Total Pages :434 pages Book Rating :4.4/5 (33 download)
Book Synopsis fib Model Code for Concrete Structures 2010 by : fib - federation internationale du beton
Download or read book fib Model Code for Concrete Structures 2010 written by fib - federation internationale du beton and published by John Wiley & Sons. This book was released on 2013-12-04 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Federation for Structural Concrete (fib) is a pre-normative organization. 'Pre-normative' implies pioneering work in codification. This work has now been realized with the fib Model Code 2010. The objectives of the fib Model Code 2010 are to serve as a basis for future codes for concrete structures, and present new developments with regard to concrete structures, structural materials and new ideas in order to achieve optimum behaviour. The fib Model Code 2010 is now the most comprehensive code on concrete structures, including their complete life cycle: conceptual design, dimensioning, construction, conservation and dismantlement. It is expected to become an important document for both national and international code committees, practitioners and researchers. The fib Model Code 2010 was produced during the last ten years through an exceptional effort by Joost Walraven (Convener; Delft University of Technology, The Netherlands), Agnieszka Bigaj-van Vliet (Technical Secretary; TNO Built Environment and Geosciences, The Netherlands) as well as experts out of 44 countries from five continents.
Book Synopsis Tests of Bond Between Concrete and Steel by : Theodore Lincoln Condron
Download or read book Tests of Bond Between Concrete and Steel written by Theodore Lincoln Condron and published by . This book was released on 1907 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tests of Bond Between Concrete and Steel by : Duff A. B. 1880 Abrams
Download or read book Tests of Bond Between Concrete and Steel written by Duff A. B. 1880 Abrams and published by Palala Press. This book was released on 2016-05-02 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Book Synopsis Bonded Cement-Based Material Overlays for the Repair, the Lining or the Strengthening of Slabs or Pavements by : Benoît Bissonnette
Download or read book Bonded Cement-Based Material Overlays for the Repair, the Lining or the Strengthening of Slabs or Pavements written by Benoît Bissonnette and published by Springer Science & Business Media. This book was released on 2011-03-16 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: Among different approaches that can be considered for concrete rehabilitation, bonded overlays are often the most economical alternative. The primary purpose of overlays is to extend the life of the candidate structures, either by restoring the quality and integrity of the surface and/or the re-establishing or improving the load-carrying capacity. Nevertheless, the durability of bonded overlay systems still draws concerns in the technical community because of bond sustainability problems encountered in a number of cases. At this time, there is still no accepted design approach or methodology that can warrant the practitioner a successful outcome of the repair. This State-of-Art report summarizes the findings with respect to all aspects involved in the overlaying process.