Diagnostic Of Concrete Samples Affected By Internal Swelling Reactions

Author : António C. Azevedo,Fernando A.N. Silva,João M.P.Q. Delgado,Nicole P.S. Souza,Mahfoud Tahlaiti,Abdelhafid Khelidj
Publisher : Springer Nature
Page : 82 pages
File Size : 48,9 Mb
Release : 2021-06-18
Category : Technology & Engineering
ISBN : 9783030764975

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Diagnostic of Concrete Samples Affected by Internal Swelling Reactions by António C. Azevedo,Fernando A.N. Silva,João M.P.Q. Delgado,Nicole P.S. Souza,Mahfoud Tahlaiti,Abdelhafid Khelidj Pdf

This book offers a complete diagnosis of concrete samples collected from a pile cap block of residential buildings affected by internal swelling reactions. Covering an extensive laboratory campaign to evaluate the transport properties of concrete samples, as well as their physical and chemical composition using advanced techniques to analyse cores extracted from real buildings that have concrete elements affected by internal swelling reactions (ISR). It features several rehabilitation procedures, pile caps repair and rehabilitation design, executed using strengthening procedures to provide the complete restoration of the structural integrity of the element deteriorated. These rehabilitation procedures proved to be a good solution to retrofit pile cap deteriorated by expansions due to internal swelling reactions of concrete. The book also offers a systematic review of the current state of knowledge and it is a valuable resource for scientists, students, and practitioners in various scientific and engineering disciplines, namely, civil and materials engineering, as well as and other interested parties.

Author : Leandro F. M. Sanchez
Publisher : CRC Press
Page : 0 pages
File Size : 55,6 Mb
Release : 2024-02-10
Category : Electronic
ISBN : 1032035986

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Internal Swelling Reactions in Concrete by Leandro F. M. Sanchez Pdf

This looks at internal swelling reaction mechanisms in concrete such as alkali-aggregate reaction, delayed ettringite formation, and freeze-thaw cycles. It outlines qualitative and quantitative protocols for multi-level assessment, using advanced microscopic and mechanical techniques, and includes a detailed case study.

Author : António C. Azevedo,Fernando A.N. Silva,João M.P.Q. Delgado,Isaque Lira
Publisher : Springer Nature
Page : 93 pages
File Size : 47,8 Mb
Release : 2022-09-14
Category : Technology & Engineering
ISBN : 9783031122675

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Concrete Structures Deteriorated by Delayed Ettringite Formation and Alkali-Silica Reactions by António C. Azevedo,Fernando A.N. Silva,João M.P.Q. Delgado,Isaque Lira Pdf

This book discusses the behaviour of isolated concrete bottle-shaped struts affected by internal expansion reactions (ISR). For that purpose, the numerical modelling of damaged concrete was performed using the Concrete Damaged Plasticity Model (CDPM) implemented in ABAQUS and validated the model through Sankovich's tests. A procedure to automatically obtain the concrete plasticity and damage parameters, essential for CDPM, was developed in Matlab. The inputs were the characteristic compressive strength of the concrete, the equivalent length of the finite element mesh and the ratio between the plastic and inelastic compressive strains. The results showed that the CDPM could represent the load-bearing mechanisms of isolated concrete bottle-shaped struts for a range of several stress levels to which these elements may be subjected in the panels investigated. The numerical simulations for different expansion levels consistently captured the expected damage profile of the panels and the load corresponding to the formation of the first crack, the estimated crack opening, and the ultimate load. For the panels investigated, the reduction observed in the failure load reached values close to 70%, the increase of the tensile plastic deformation was more than 60%, and the maximum crack opening can reach an increase of 113% when compared with those observed experimentally in panels without internal swelling reactions The book also offers a systematic review of the current state of knowledge and it is a valuable resource for scientists, students, practitioners, and lecturers in various scientific and engineering disciplines, namely, civil and materials engineering, as well as and other interested parties.

Author : Leandro F. M. Sanchez
Publisher : Springer Nature
Page : 748 pages
File Size : 47,7 Mb
Release : 2024-07-02
Category : Electronic
ISBN : 9783031593499

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Proceedings of the 17th International Conference on Alkali-Aggregate Reaction in Concrete by Leandro F. M. Sanchez Pdf

Author : João M. P. Q. Delgado
Publisher : Springer Nature
Page : 159 pages
File Size : 41,5 Mb
Release : 2021-09-16
Category : Technology & Engineering
ISBN : 9783030804961

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Masonry: Building Pathologies and Design by João M. P. Q. Delgado Pdf

This book presents a collection of recent research works related to blast resistant design, building pathologies, seismic coating, bottle-shaped concrete struts, delayed ettringite formation and waterproofing. It features eight chapters on building pathologies as well as a detailed set of references and suggestions for further reading. Offering a systematic review of the current state of knowledge, it is a valuable resource for scientists, students, practitioners, and lecturers in various scientific and engineering disciplines, including civil and materials engineering, as well as and other interested parties.

Author : Bruno Godart,Mario de Rooij,Jonathan G.M. Wood
Publisher : Springer Science & Business Media
Page : 91 pages
File Size : 50,7 Mb
Release : 2013-04-08
Category : Technology & Engineering
ISBN : 9789400765672

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Guide to Diagnosis and Appraisal of AAR Damage to Concrete in Structures by Bruno Godart,Mario de Rooij,Jonathan G.M. Wood Pdf

This book describes procedures and methodologies used predominantly to obtain a diagnosis of damaged concrete possibly caused by Alkali-Aggregate Reaction (AAR). It has two primary objectives, namely firstly to identify the presence of AAR reaction, and whether or not the reaction is the primary or contributory cause of damage in the concrete; and secondly, to establish its intensity (severity) in various members of a structure. It includes aspects such as field inspection of the structure, sampling, petrographic examination of core samples, and supplementary tests and analyses on cores, such as mechanical tests and chemical analysis. Evaluation of test data for prognosis, consequences and appraisal will be more fully set out in AAR-6.2.

Author : Leandro F. M. Sanchez
Publisher : CRC Press
Page : 220 pages
File Size : 48,7 Mb
Release : 2024-02-19
Category : Technology & Engineering
ISBN : 9781003837923

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Internal Swelling Reactions in Concrete by Leandro F. M. Sanchez Pdf

As critical concrete infrastructure deteriorates, engineers need efficient and reliable techniques to appraise the causes and the extent of deterioration, to evaluate the structural consequences and to select effective management protocols and rehabilitation strategies. This book looks at deterioration caused by internal swelling reaction (ISR) mechanisms in concrete, such as alkali-aggregate reaction, delayed ettringite formation and freeze-thaw cycles. The book provides accessible and comprehensive coverage of recent work and developments on the most common ISR mechanisms leading to induced expansion and deterioration. It addresses the implications of ISR on different scales (micro, meso and macro), outlines qualitative and quantitative techniques to assess the condition of affected concrete and introduces the multi-level assessment protocol, using advanced microscopic and mechanical techniques, particularly the stiffness damage test and damage rating index, as a reliable approach to appraise ISR-affected infrastructure. Also included is a detailed case study of the Robert-Bourassa Charest Overpass in Quebec. Internal Swelling Reactions in Concrete: Mechanisms and Condition Assessment is primarily intended for undergraduate and graduate students, as well as academics interested in the field of concrete durability and condition assessment of concrete. It will also be of interest to engineers and infrastructure owners dealing with ISR-related problems.

Author : James A. Farny,Beatrix Kerkhoff,Portland Cement Association
Publisher : Unknown
Page : 28 pages
File Size : 44,8 Mb
Release : 1997
Category : Technology & Engineering
ISBN : CORNELL:31924080951043

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Diagnosis and Control of Alkali-aggregate Reactions in Concrete by James A. Farny,Beatrix Kerkhoff,Portland Cement Association Pdf

Aggregates containing certain constituents can react with alkali hydroxides in concrete. The reactivity is potentially harmful only when it produces significant expansion. This alkali-aggregate reactivity (AAR) has two forms--alkali-silica reaction (ASR) and alkali-carbonate reaction (ACR, sometimes called alkali-carbonate rock reaction, or ACRR). ASR is of more concern than ACR because the occurrence of aggregates containing reactive silica minerals is more common. Alkali-reactive carbonate aggregates have a specific composition that is not very common. Alkali-silica reactivity has been recognized as a potential source of distress in concrete since the later 1930s. Even though potentially reactive aggregates exist throughout North America, ASR distress in structural concrete is not common. There are a number of reasons for this: 1. Most aggregates are chemically stable in hydraulic-cement concrete 2. Aggregates with good service records are abundant in many areas 3. The concrete in service is dry enough to inhibit ASR 4. The use of certain pozzolans or slags controls ASR 5. In many concrete mixtures, the alkali content of the concrete is low enough to control harmful ASR 6. Some forms of ASR do not produce significant deleterious expansion To reduce ASR potential requires understanding the ASR mechanism; properly using tests to identify potentially reactive aggregates; and, if needed, taking steps to minimize the potential for expansion and related cracking. Alkali-carbonate reaction in concrete was not documented until 1957. Although ACR is much less common, this report also briefly reviews the mechanism, visual distress symptoms, identification tests, and control measures.

Author : Hiroshi Yokota,Dan M. Frangopol
Publisher : CRC Press
Page : 8732 pages
File Size : 54,6 Mb
Release : 2021-04-20
Category : Technology & Engineering
ISBN : 9781000173819

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Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations by Hiroshi Yokota,Dan M. Frangopol Pdf

Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations contains lectures and papers presented at the Tenth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2020), held in Sapporo, Hokkaido, Japan, April 11–15, 2021. This volume consists of a book of extended abstracts and a USB card containing the full papers of 571 contributions presented at IABMAS 2020, including the T.Y. Lin Lecture, 9 Keynote Lectures, and 561 technical papers from 40 countries. The contributions presented at IABMAS 2020 deal with the state of the art as well as emerging concepts and innovative applications related to the main aspects of maintenance, safety, management, life-cycle sustainability and technological innovations of bridges. Major topics include: advanced bridge design, construction and maintenance approaches, safety, reliability and risk evaluation, life-cycle management, life-cycle sustainability, standardization, analytical models, bridge management systems, service life prediction, maintenance and management strategies, structural health monitoring, non-destructive testing and field testing, safety, resilience, robustness and redundancy, durability enhancement, repair and rehabilitation, fatigue and corrosion, extreme loads, and application of information and computer technology and artificial intelligence for bridges, among others. This volume provides both an up-to-date overview of the field of bridge engineering and significant contributions to the process of making more rational decisions on maintenance, safety, management, life-cycle sustainability and technological innovations of bridges for the purpose of enhancing the welfare of society. The Editors hope that these Proceedings will serve as a valuable reference to all concerned with bridge structure and infrastructure systems, including engineers, researchers, academics and students from all areas of bridge engineering.

Author : Geoffrey E. Blight,Mark G Alexander
Publisher : CRC Press
Page : 250 pages
File Size : 48,8 Mb
Release : 2011-01-18
Category : Science
ISBN : 9780203093214

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Alkali-Aggregate Reaction and Structural Damage to Concrete by Geoffrey E. Blight,Mark G Alexander Pdf

Since AAR was first identified in 1940, it has been a subject dominated by studies of the mineralogy of AAR-susceptible aggregates, the chemistry of the AAR and related reactions and laboratory tests used to diagnose AAR and predict potential future swelling. Civil and structural engineers have found the literature bewildering and difficult to appl

Author : Marc-Andre Berube,Benoit Fournier
Publisher : Unknown
Page : 128 pages
File Size : 45,9 Mb
Release : 2024-07-02
Category : Electronic
ISBN : 2884492151

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Alkali-Aggregate Reaction in Concrete by Marc-Andre Berube,Benoit Fournier Pdf

Author : Bruno Godart,Mario Robert de Rooij,Jonathan G. M. Wood
Publisher : Springer
Page : 104 pages
File Size : 51,8 Mb
Release : 2013-04-30
Category : Aggregates (Building materials)
ISBN : 9400765681

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Guide to Diagnosis and Appraisal of AAR Damage to Concrete in Structures by Bruno Godart,Mario Robert de Rooij,Jonathan G. M. Wood Pdf

This book describes procedures and methods for obtaining a diagnosis of concrete damage caused by Alkali-Aggregate Reaction (AAR). Covers field inspection, sampling, petrographic examination of core samples and supplementary tests and analyses on cores.

Author : G. A. R. Parke,P. Disney
Publisher : Thomas Telford Publishing
Page : 696 pages
File Size : 46,9 Mb
Release : 2005
Category : Technology & Engineering
ISBN : UOM:39015063675683

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Bridge Management 5 by G. A. R. Parke,P. Disney Pdf

Contains over eighty papers covering the fields of bridge management systems, inspection methods, structural assessment and maintenance strategies; together with the reliability and risk management techniques. This book is useful for bridge owners and engineers engaged in bridge design, assessment, repair and strengthening. The last five years have seen the art of bridge management develop into a mature subject. Bridge owners and engineers recognise the importance of implementing fully operational bridge management strategies to ensure that all road and rail bridges remain functional for as long as possible. Bridge structures form a major part of the vast financial investment in infrastructure and consequently their careful management involving structural appraisal, repair and strengthening is of paramount importance. Factors such as the chosen repair method can influence how often and for how long a bridge structure is out of operation. This in turn, determines the ensuing traffic and/or rail delay costs and also any resulting increase in traffic pollution.The 5th volume on Bridge Management contains over eighty papers which span the fields of bridge management systems, inspection methods, structural assessment and maintenance strategies; together with the latest reliability and risk management techniques. Almost all of these papers have been presented at the Fifth International Conference on Bridge Management held at the University of Surrey in Guildford, UK in 2005. The book will prove to be a very useful reference manual for all bridge owners and engineers engaged in bridge design, assessment, repair and strengthening. The volume is also recommended as a reference text for other professionals who are concerned with care of the environment and the minimisation of pollution due to traffic delays and non-conventional repair and protection methods.

Author : Alain Sellier,Étienne Grimal,Stéphane Multon,Eric Bourdarot
Publisher : John Wiley & Sons
Page : 388 pages
File Size : 54,5 Mb
Release : 2017-08-07
Category : Technology & Engineering
ISBN : 9781786302137

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Swelling Concrete in Dams and Hydraulic Structures by Alain Sellier,Étienne Grimal,Stéphane Multon,Eric Bourdarot Pdf

The swelling of concrete is a major concern for the owners and operators of dams and hydraulic structures. Faced with irreversible movement of their dams or with observations of cracking processes, operators need to explain the phenomena observed in order to justify safety conditions and in some cases to plan remedial works. Over the last 20 years, active research has been carried out in the field, resulting in practical results in phenomena interpretation and dam modeling. At the same time, an increasing number of affected dams have undergone safety re-evaluations and in some cases remedial work. Several of them have been removed altogether. Although it remains difficult to establish a “state of the art” in this domain due to the rapidly changing context, regular international exchanges in the field appear fruitful and necessary. Following on from previous conferences in the field organized by Robin Charlwood, former President of the ICOLD Concrete Committee, the initiative was taken by EDF and Toulouse University-LMDC to organize a workshop to provide a new opportunity for sharing experience. The aim of this workshop is to assemble active researchers, leading engineers, and experts from the practicing community and administration interested directly or indirectly in concrete swelling effects in dams and hydraulic structures. All types of chemical expansion phenomena, including those due to alkali aggregate reactions and those due to ettringite formation, are addressed. These proceedings include 24 papers written by experts renowned in their field, illustrating the need to progress with interdisciplinary approaches.

Author : Victor E. Saouma
Publisher : Springer Nature
Page : 594 pages
File Size : 51,6 Mb
Release : 2020-09-21
Category : Technology & Engineering
ISBN : 9783030440145

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Diagnosis & Prognosis of AAR Affected Structures by Victor E. Saouma Pdf

This book presents the work of the RILEM Technical Committee 259-ISR. Addressing two complementary but fundamental issues: the kinetics of the reaction, and how this will affect the integrity of the structure (serviceability and strength), it also provides methodology for assessing past deterioration to enable readers to make engineering/science-based predictions concerning future expansion. The book is divided into six major topics: selection and interpretation of optimal monitoring system for structures undergoing expansion to monitor the progress of the swelling evolution and its consequences; development/refinement of current laboratory procedures to determine the kinetics of the reaction i.e. expansion vs (future) time, and to determine the kinetic characteristics of the time-dependent reaction to be used in a finite element simulation; extrapolation of results from structural component laboratory testing; selection of material properties based on data from existing structures affected by the alkali silica reaction or delayed ettringite formation; identification of critical features that should be present in a finite element code, development of test problems for validation, and a survey of relevant programs able to conduct a transient structural analysis of a structure undergoing chemically induced expansion; and lastly guidelines for finite element codes. The book is intended for practitioners responsible for concrete structures affected by the damaging alkali aggregate reaction, engineers dealing with aging structures, and researchers in the field.